Dometic rv ac reset

This article is about Dometic appliances or thermostats, not generic air conditioners. So the E7 code appearing on your Dometic air conditioner should have the same meaning as it does when it appears on the Dometic thermostat. There is a loss of power. However, different companies use the same codes yet do not use the same meanings.

Dometic rv ac reset. This article is about Dometic appliances or thermostats, not generic air conditioners. So the E7 code appearing on your Dometic air conditioner should have the same meaning as it does when it appears on the Dometic thermostat. There is a loss of power. However, different companies use the same codes yet do not use the same meanings.

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RV Air Conditioner / By James V. There is a sensor for everything. Once modern technology got involved, electronic devices got far more complicated than they should be. In many cases, there is nothing wrong with the device. ... Dometic E4 Code Reset. One owner went to test his control panel and he removed the red wire. Everything seemed to be ...Thermostats manage most heating, ventilation, and air conditioning (HVAC) systems. Knowing about the Dometic 3-wire thermostat wiring diagram might come in handy if you ever need to replace an old one or figure out what’s wrong with a brand-new one.. In this article, we have provided a detailed guide regarding which color wire goes where, some …To fix this, you will need to disconnect the wires leading to the thermostat and then attach them together, bypassing the thermostat entirely. If the AC starts working properly, then it is definitely a broken thermostat, to which you will need to buy a new one. 3. The Air Conditioning Unit Motor is Unusually Loud.The Dometic RML 8555 has a capacity suitable for storing various food and beverage items. It features a spacious interior with multiple shelves and compartments, providing ample storage space to keep everything organized. The cooling performance of the RML 8555 is highly efficient, ensuring that the contents are kept at the desired temperature.On reset an air conditioner, push press maintain the preset button for 3 seconds. The Dometic RV air conditioner reset button be located on this drive panel. To reset the air dust, force and hold the reset button for 3 secondaries.The reset button on a Dometic RV air conditioner is typically located on the control panel. Press the button to reset the unit if it is not working properly. ... To determine if your RV AC compressor is bad, feel the air near the fan on the unit. If the air is lukewarm or cool instead of hot, it may indicate compressor problems. Consider ...depends on the brand and model of your air conditioner, but on several varieties, E4 means it is iced up. Switch fan only for a while (ten or twenty minutes) and reset the air conditioner by turning it off for a few minutes.

The furnace control board is normally near the blower motor. Locate the control board reset switch. Hold the reset button or switch for a few seconds. Turn on the furnace after a few minutes after releasing the button or switch. If resetting the furnace doesn't work or you're unsure how, get expert help.Contact Dometic Support: If the above steps don't resolve the issue, consider reaching out to Dometic customer support or consulting the refrigerator's manual for model-specific instructions. It's important to note that the exact reset procedure can vary depending on the model and features of your Dometic RV refrigerator.It is best to know what they mean. When the Dometic RV refrigerator check light is on, it is telling you there is a problem with the gas system inside the fridge. When you see it lit up, make sure to check the gas system to see what the source of the problem is. To learn more about this issue, just continue to read our article.There is a system reset process to adhere to, which is as follows: Disconnect the plug. Next, flip the switch back to the On position while simultaneously pressing the mode and zone buttons. As you go, the digital display should show the letters FF, and they should stay there until you let go of the zone and mode keys.If your RV air conditioner won’t turn on, there are a few things you can do to reset it. First, check the power source. Make sure the RV is plugged into a power source or that the generator is running. If the …4 Dometic WH-6GEA Troubleshooting Methods Explained! You can utilize the following methods to troubleshoot common issues related to your faulty Dometic water heater. 1. Look for Issues with Thermostat. If your RV water heaters are not working properly, it is often because the thermostat is not set correctly.

The compressor in my A/C wouldn't turn off. Here is how I fixed the problem.Facebook.com/RamblinMichiganderDometic Air Conditioners 3316230.700 Control Kit/Relay Box Heat/Cool with Polar White CT Wall Thermostat. dummy. MICRO-AIR EasyTouch RV Thermostat, Wireless & Digital, WiFi & Bluetooth Function, Compatible, Coleman, Atwood, GE, Great for Outdoor RV Camping, Free & Easy Access App, 350 Black ... "Clock reset if power loss is annoying. Works fine ...The furnace can occasionally fail to ignite for a number of reasons, including a malfunctioning ignition system, fuel supply problems, a dirty air filter, and a damaged blower or thermostat. You could need to perform some analysis to solve the issue. You might also need some tools to fix the furnace if the Dometic RV furnace won’t ignite.System Reset 8. AC Power Module 17. DC V olt age 9. Reversing V alve TOOLS REQUIRED The air conditioner can be checked with a voltmeter , ohm-meter , clamp-on ammeters and two good thermometers. Some clamp-on ammeters can read voltage and ohms. ... '2002 Dometic Corporation LaGrange, IN 46761 FIG. 1. 2 B. DETAILED TROUBLESHOOTING FOR COMFORT ...Single Zone CT Thermostat only - Black. The Dometic CT Single Zone Thermostat can control your Dometic heating or cooling appliances. Find a dealer. Sold in our dealer network Art nr: 9108853325.Turn off the RV AC. Press and hold the plus (+) and the On/Off Mode buttons on the thermostat for 3 seconds. Press the On/Off Mode button again to turn off and reset the entire system. Keep in mind that resetting an RV AC also requires identifying the source of the problem.

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The E4 code has nothing to do with the Oasis unit, but with the heat pump/AC unit located on the rear roof of your coach. The "smart" thermostat is telling you that the Outdoor Temp sensor is open or bad (i.e. out of range). If you are electrically trained, this can be measure using a digital volt meter.From campground fee costs, RV types and top tips to live a successful RV lifestyle, we’ll cover what you need to know about living in an RV full-time. By clicking "TRY IT", I agree...Having a cordless telephone or cell phone really helps. If you have a digital voltmeter make sure it's at hand and have the cover off the appliance to facilitate getting at your control board. Dinosaur Electronics can be reached by phone at 541-994-4344 8 a.m. - 5 p.m. Monday through Friday, Pacific time.CCC 2 thermostat will require a system reset. For system reset procedure, see main heading, "System Reset Procedure" on page (19). Your Dometic CCC 2 thermostat has been pre-programmed. Review settings below and adjust the settings to your personal comfort level. Any time the CCC 2 is in an idle stage (not illuminated) you will need to wake it

Junior Member. Join Date: Dec 2017. Posts: 23. 2015 Dometic AC shuts off after 18 mins. Hi guys - I searched the forums and general internet but couldn't find what seemed to me to be the same issue I am having. My front dometic AC rooftop unit on our 2016 Montana is shutting off about every 18 minutes. I let it rest for 5 mins then restart it ...Resetting Narcold RV Refrigerators. The reset process of a Narcold RV refrigerator is really simple and is done on default settings. Most of these models contain a reset button which allows for an easy reset process. For rv refrigerator reset, holding down the power button does the trick. The minimum wait time between turning off and back on is ...3. Rear temp sensor (behind rear TV) and Rear AC. The "E1 error" - which is common - occurs when there is either a disruption in the communication from one or more of these cables, OR if there is a problem with the Dometic Penguin II AC control board itself. Brief troubleshooting guide for the Dometic CCC2 dual AC “E1 error” issue: Issue ...Dometic Water Heater Reset Button Location. The location for this brand’s water heater reset button is on the upper thermostat. If you are having a problem, the button should be popped out and all you have to do is reach in and push the button. When you push the reset button, you should hear a click and the button should be flush with its ...Remove the control board and look under it. You probably have a burnt trace after the relay that engages for the 120 VAC operation. -Don- Reno, NV. DonTom said: After removing all power and after writing down where each wire goes (and take a photo of it all too): Remove the control board and look under it.Exterior maintenance will require you to climb onto the roof of the RV. Confirm all power and breakers are off to the A/C unit. Remove the A/C shroud, being careful not to damage the coils on the back of the unit. Once removed spray A/C coil cleaner on the coils and allow it to break down any dirt and debris in the coils.Resetting an RV AC unit often demands users to follow specific instructions dictated by the manufacturer. For instance, here are the steps to reset a Dometic camper AC: Turn off the RV AC. Press and …Nov 19, 2022 · Locate the reset button on the circuit board and press it. The air conditioner should now be reset and ready to use. Unplug the air conditioner from the power outlet. Remove the front panel of the air conditioner. Locate the reset button on the control board inside the air conditioner. Press and hold the reset button for three seconds, then ... Dec 3, 2023 · I have been working in this field for over 5 years and have a lot of experience with different AC units. I write here to help people solve their Air Conditioning problems and find the best solutions for their needs. If you are having any issues with your air conditioner or are thinking about buying a new one, be sure to check out my blog! Name. Use a small screwdriver to gently press the reset button located on the thermostat sub-base. Hold the reset button down for 3-5 seconds, then release it. Put the thermostat cover back on. Plug the air conditioner back in or turn the generator back on. Turn on the air conditioner and see if it starts running.

By following these safety precautions, you can ensure a smooth and risk-free cleaning process for your Dometic RV air conditioner. Step 1: Turn off the Power. Before you start cleaning your Dometic RV air conditioner, it's essential to turn off the power to avoid any potential accidents or damage. Here's how you can do it:

If your Dometic fridge is properly plugged in and the AC unit is working, but the fridge still isn't cooling, one potential solution is to reset the fridge. To do this, unplug the fridge from the AC outlet and then plug it back in. Once the fridge is plugged back in, press and hold the reset button for three seconds.12 Jul 2017 ... Capacitors contain / store⚡ high voltage ⚡! With RV unplugged to AC power, short terminals with a rubber handled screw driver.Press and hold the reset button: Locate the reset button on your Dometic thermostat. Press and hold it for at least 5 seconds. Wait for the confirmation message: After holding the reset button, wait for the thermostat to display a confirmation message. This message will indicate that the hard reset process has been initiated.1 - RV Fridge Essentials. VIDEO: This video shows the components on an RV fridge. This is the index for the remainder of the Complete RV Fridge Repair Series. This video shows the back side of the fridge including propane (LP Gas) components such as the Gas Control Valve (SOV), Burner, and Boiler Assembly, along with other cooling unit ...Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!An RV air conditioner works much like a residential air conditioner - by using a compressor to cool and circulate the air. ... In most cases, your RV AC reset button is located near the compressor. It may be hidden behind a panel or on the side of the unit. ... Next Article Dometic RV Water Heater Not Working on Electric: What to Do? Leave a ...To reset a Dometic AC control panel, locate the reset switch, usually a small red button located on the outdoor unit, and press it for three seconds, then release. Another method is to use the system initialization mode by turning off the thermostat and pressing and holding the "mode" and "+" buttons until the display shows ...Dometic Brisk II | 11K BTU Air Conditioner | White | Standard Height | 9105305704 | Ducted or Non- Ducted | Quiet AC | Easy Install | Ideal For Campers, Vans, RV or Trailers | Lightweight dummy RecPro RV Air Conditioner 13.5K Ducted | Quiet AC | 110-120V | Cooling Only | Easy Install | All-in-One Unit | For Camper, Travel Trailer, Fifth Wheel ...Dometic ac that would not cool. Compressor tried to start but I could smell burned wires while it starts. I replaced the start capacitor and fixed the problem.I am only 3 years in on my Newmar, but had the E1 code show up 3 times; it turned out to be one of the 2 A/C units was drawing to much power to start the compressor, installed a hard start kit and problem solved!

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How can we help? Help me find the right product. Maintenance, upgrade or service. Product registration. FAQ, Product Manuals & Brochures. Warranty. Spare parts. Apps. Are you a business partner?Reaching in to the back via the outer access door, the tubing of the cooling unit leading down to the boiler (the fat reservoir near the lower middle) should be warm-hot but not blistering. If you test with your fingers, be careful! You can a free service manual and service tips at Dometic RM2852 - PDX RV. May 4, 2021.Step 4: Restore Power and Test the Air Conditioner. After resetting your air conditioner, restore power to your RV and turn on the air conditioner. Test the air conditioner to see if it’s working correctly. If it’s working, great! If not, you may need to call a professional to diagnose and fix the problem.CCC 2 thermostat will require a system reset. For system reset procedure, see main heading, "System Reset Procedure" on page (19). Your Dometic CCC 2 thermostat has been pre-programmed. Review settings below and adjust the settings to your personal comfort level. Any time the CCC 2 is in an idle stage (not illuminated) you will need to wake itIt has been reset and the remoted - Answered by a verified RV Mechanic. ... I have a 2005 Keystone Zepplin with a Dometic Duo-Therm air conditioner and furnace. The sensor on the ceiling is not receiving the signal from the remote. ... We have a 2006 Colorado fifth wheel RV that has a furnace operated by a Dometic Remote Comfort Control.Dometic CCC2 Thermostat not working. Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts. Zone 2 on my thermostat would not work. My first point of troubleshooting was to do a reset as directed in the manual. I made sure the mode was in the OFF position and powered down the thermostat. Optional Heat Strip. Provides 5,600 BTU of heat without any alterations to ducts or distribution box. Heat strip is pre-wired in most Penguin models for quick and easy installation. The Dometic 15000 BTU Duo Therm Brisk 2 Air RV Air Conditioner B59516.XX1C0 is a rooftop unit that's lighter, has less noise, and low amp for better cooling. Dometic Duo-Therm Thermostat Reset and Troubleshooting. Dometic rv thermostat replacement Dometic rv thermostat wiring diagram Dometic rooftop rv air conditioner thermostat wiring / dometic rooftop. My name is, i have a dometic 15,000 btu roof top a/c unit that is not.Get your 15,000 BTU Dometic RV Air Conditioner from United RV Parts! Free Shipping on orders over $100. Shop now for the best selection and prices. ... The highest price is $2,099.99 Reset. From $ To $ Product Category. 0 selected Reset. Air Conditioner (22) Manufacturer. 0 selected Reset. Dometic (22) Sort by:For instance, here are the steps to reset a Dometic camper AC: Turn off the RV AC. Press and hold the plus (+) and the On/Off Mode buttons on the thermostat for 3 seconds. Press the On/Off Mode button again to turn off and reset the entire system. Keep in mind that resetting an RV AC also requires identifying the source of the problem. ….

Dometic Air Conditioners 3316230.700 Control Kit/Relay Box Heat/Cool with Polar White CT Wall Thermostat. dummy. MICRO-AIR EasyTouch RV Thermostat, Wireless & Digital, WiFi & Bluetooth Function, Compatible, Coleman, Atwood, GE, Great for Outdoor RV Camping, Free & Easy Access App, 350 Black ... "Clock reset if power loss is annoying. Works fine ...The e5 code is coming on - we have gone through the reset feature-it didn't change anything except now it says auto zone 1 E5 fan hi. ... Question for Randall. I am troubleshooting a Dometic RV AC. The unit starts and runs properly on Hi Cool and blows cold air, but after running for a while, the cooling coils freeze up. ...The RV heater's reset button is located inside the blower compartment on the side of the furnace motor and is usually a red button which is labeled 'reset'. Turn off the power supply and shut off the gas to your camper furnace, press the button, and turn everything back on and see if your RV heater is still blowing cold air or if ...The best places to visit in an RV this summer including Ridgway State Park, Devils Lake State Park, Priest Lake, Big Bend National Park, and more. When social-distancing norms came...3. The display is stuck- if this happens, the usual source for the problem is a mistake in the configuring process. When you see the display is stuck, you have to reset the thermostat. To do that, you just need to remove the power supply, wait a few minutes and then reconnect the power and re-configure the device.Sources include Learn To RV, The RVGeeks, RV Share, Dometic, and Life on Route. How To Fix An RV AC Turning On With The Furnace. To answer this question, you have to know what kind of climate control system you have. Some RVs have a combined HVAC unit, which both heats and cools the inside of the RV. Other RVs have the AC and the heating ...Rooftop RV air conditioner units are positioned over the window in your vehicle’s roof. If you have a smaller camper or RV, these are great because they don’t take up valuable storage space inside. Because they are on top of the vehicle, they add to your overall height and clearance. However, many low profile options exist now, making this ...Troubleshooting Tips. Check the fault codes (if applicable). Many RV air conditioner models, for example, the Dometic Brisk 2, will display a fault code on the unit when there is an issue. Check your owner's manual for the meaning of the code. Check the high-pressure switch circuit.If so, then it's probably the same lockout that prevents the air conditioner or furnace from operating if under 40F or over 100F. If the temperature in the trailer is below 40F, try a hair dryer to blow on the thermistor (the little bumpout with the slits molded in it) and see if that will unlock the air conditioner. Dometic rv ac reset, To reset a Dometic thermostat, locate the reset button and hold it for a few seconds until the screen goes blank. Then release the button and wait for the thermostat to restart. Resetting a Dometic thermostat is a simple process that can help resolve common issues, such as temperature discrepancies or unresponsive controls., If your RV air conditioner won’t turn on, there are a few things you can do to reset it. First, check the power source. Make sure the RV is plugged into a power source or that the generator is running. If the …, Turn off the dometic RV fridge and unplug it from its power source. Leave it unplugged for 10-15 minutes to allow all internal components and refrigerant to reset themselves. Reconnect the appliance ‘s power cord and turn on the fridge at its lowest or default settings (around 3 or 4). Once the fridge has been running for a few minutes ..., Turn off the RV AC. Press and hold the plus (+) and the On/Off Mode buttons on the thermostat for 3 seconds. Press the On/Off Mode button again to turn off and reset the entire system. Keep in mind that resetting an RV AC also requires identifying the source of the problem., With power to the Passport control disconnected, press and hold the Down button while reconnecting the AC power. When the display indicates "888" and all LEDs are lit (Power-On Reset), release the Power button. While the display shows "tSt" the following commands cycle continuously: "Hr" displays for one second., New powerful Dometic RV Air Conditioners that can keep you cool whatever the adventure. FreshJet 3 Series RV AC Units & ABD Models. Dometic FreshJet 3 Series 15K. Rooftop RV Air Conditioner, 15,000 BTU, standard profile, Ducted or Non-Ducted Application. Sold in our dealer network., If you are still having problems after trying this solution, then you may still have some air in your propane lines that need to be purged. Since you can’t light the furnace, light the water heater instead. Let the water heater run for about 30 minutes and your furna c e should relight on the first try., To reset a Dometic RV air conditioner, turn off the unit and disconnect power for at least 30 seconds. Then, reconnect power and turn the unit back on. This can help resolve minor issues and reset the system. Troubleshooting Common Issues., 6 Pin Out From AC to Control Box. Terminal 1 BLUE Compressor. Terminal 2 BLACK High Fan. Terminal 3 YELLOW Medium Fan. (or Heat Pump Rev Valve CCC/Analog) Terminal 4 RED Low Fan. Terminal 5 WHITE Neutral. Terminal 6 GREEN / YELLOW Ground. (Ground is sometimes GREY), RV Furnaces. If you are planning to travel when the weather’s cold, a heat source is a must. Dometic provides a selection of furnaces to keep you warm – even if it’s well below zero outside. Engineered for easy maintenance and excellent air delivery, our lightweight products are compact and reliable. Multiple duct options are available., rv air conditioners. what should i do to make sure the filter on my rooftop unit is clean for maximum efficiency? my rooftop unit has the electric heat strip option (non-heat pump electric heat option), but when it gets colder outside it doesn't seem to maintain the temperature. what should i do? what are the benefits of a rv air conditioner?, If so, then it's probably the same lockout that prevents the air conditioner or furnace from operating if under 40F or over 100F. If the temperature in the trailer is below 40F, try a hair dryer to blow on the thermistor (the little bumpout with the slits molded in it) and see if that will unlock the air conditioner., Get your 15,000 BTU Dometic RV Air Conditioner from United RV Parts! Free Shipping on orders over $100. Shop now for the best selection and prices. ... The highest price is $2,099.99 Reset. From $ To $ Product Category. 0 selected Reset. Air Conditioner (22) Manufacturer. 0 selected Reset. Dometic (22) Sort by:, 6 Pin Out From AC to Control Box. Terminal 1 BLUE Compressor. Terminal 2 BLACK High Fan. Terminal 3 YELLOW Medium Fan. (or Heat Pump Rev Valve CCC/Analog) Terminal 4 RED Low Fan. Terminal 5 WHITE Neutral. Terminal 6 GREEN / YELLOW Ground. (Ground is sometimes GREY), The various costs associated with traveling mean that even a vacation can be a time to pinch pennies. Owning an RV is one way to travel, while renting a motel room offers a differe..., Our Dometic RV refrigerator stopped working right before a big trip. See what I did to figure out the issue. Parts available here: https://amzn.to/3z5ssWE#..., 6) The thermal switch has a reset button in the center. If power is not getting to the fridge controller, start by pushing the reset switch. If the reset switch keeps tripping, the switch is warn out, these switches have a high failure rate and rarly trip due to high temperatures. 7) The power runs from the thermal switch to the thermal fuse. 8 ..., Press and hold the reset button: Locate the reset button on your Dometic thermostat. Press and hold it for at least 5 seconds. Wait for the confirmation message: After holding the reset button, wait for the thermostat to display a confirmation message. This message will indicate that the hard reset process has been initiated., Dometic CRX 50TFP3 is a 47L 3-in-1 RV refrigerator. This smart refrigerator has a stainless steel effect front, offers 47L of cool storage, including an optional 4.4L of freezer space. It's also superbly efficient and generates minimal noise. Read more. $599. In Stock Art nr: 9600002646., Description. Dometic SmartStart 9610004642. The Dometic SmartStart accessory for RVs is a soft starter that reduces AC start-up power demand by as much as 75%. The innovative device enables air conditioners to run on a generator as small as 2,000W, helping eliminate the need for shore power and making boondocking easy., Where is the reset button on an RV AC? The location of the reset button varies from model to model, but it's usually easy to find. The "reset" button is located on the back of the unit. The reset button is on the inside of the unit. The power button is usually behind the button. What does E5 mean on Dometic thermostat? The open circuit or ..., Zone 2 on our dometic air conditioner will not recognize- we have already tried a thermostat reset as well as checking - Answered by a verified RV Mechanic ... I purchased 2 B59516.xx1c0 Top Unit Only45399 Dometic 15000 BTU Duo Therm Brisk 2 Air RV Air Conditioner Top Unit, White. ..., Our RV air conditioners are engineered with advanced technology to provide efficient cooling performance, even in the harshest weather conditions. With features like low power consumption, quiet operation, and precise temperature control, Dometic air conditioners ensure a pleasant indoor climate wherever you roam. Browse by type., Press and hold the reset button: Locate the reset button on your Dometic thermostat. Press and hold it for at least 5 seconds. Wait for the confirmation message: After holding the reset button, wait for the thermostat to display a confirmation message. This message will indicate that the hard reset process has been initiated., RV Air Conditioners. Dometic Brisk II Evolution 15K. 15,000 BTU Standard Profile Rooftop Air Conditioner, Ducted or Non-Ducted Application. The Brisk II Evolution's smart design and improved materials combine to maximize air flow and performance. It is best-in-class of any standard RV rooftop air conditioner for weight, air flow and capacity., When it comes to an RV's Dometic Thermostat E1 error, most owners run to a mechanic to fix it. ... And it can be reset by following the list below: Restart the Dometic thermostat. If it doesn't work, open the front panel and remove and plug the power cables. ... and one air-conditioner cannot maintain the whole temperature alone, which is ..., Step 4: Restore Power and Test the Air Conditioner. After resetting your air conditioner, restore power to your RV and turn on the air conditioner. Test the air conditioner to see if it’s working correctly. If it’s working, great! If not, you may need to call a professional to diagnose and fix the problem., Provides 5,600 BTU of heat without any alterations to ducts or distribution box. Heat strip is pre-wired in most Penguin models for quick and easy installation. The Dometic 13500 BTU Duo Therm Brisk 2 RV Air Conditioner B57915.XX1C0 is a tough RV a/c, made from high-impact polystyrene with a reusable filter, rated at 13,500 BTU., My dometic thermostat was blinking E2, so I reset it. The ac comes on but doesnt blow cool air. It also keeps tripping - Answered by a verified RV Mechanic. We use cookies to give you the best possible experience on our website., The fan would not come on, on this Dometic AC. Does the AC need to be replaced?Merchandise https://hillbilly-rv.creator-spring.com ..., Model number 3309518.003. Dometic Duo Therm 13500 BTU Air Conditioner Replacement Shroud 3309518.003 is for a Dometic Duo Therm Brisk Air RV air conditioner. This shroud will fit both the 13.5 and the 15k. Dimensions are 34.4" L x 29.5" W x 12.7" H. Shrouds have a vulnerability to break, so replace yours with a new sturdier RV air conditioner ..., Step #2: Let the water heater cool if it has been on for some time. Step #3: Slowly open the pressure relief valve. This will let residual pressure out of the system and make it safer to drain the heater. Step #4: Remove the plastic drain plug and let the water drain out onto the ground., Description. Dometic Commercial-Grade Air Conditioner - 15,000 BTU. Commercial-grade rooftop air conditioners offer heavy-duty, long-lasting cooling for tough environments. Lightweight, energy-efficient and shock- and vibration-resistant to withstand harsh or unusual road and weather conditions. Built stronger to last up to 20% longer than ...