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Open Roads Forum  >  Tech Issues  > Dou Therm 57915.622 won't work. Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  |  Oldest first Newest first  Photog101 • View posts Sparta, TN Senior Member Joined: 01/13/2005 View Profile Offline Posted: 11/01/22 10:32pm Link  |  Quote  |  Print  |  Notify Moderator I have a 1999 Newmar American Star XL With one roof air (57915.622) and one furnace (I have not found a label on it yet) with a 4 button thermostat, that I just picked up and they didn't work at that time. At this time neither unit works (A/C or Furnace) but I have power to the thermostat. I believe that I have tracked it down to the electric kit (controller) 3106481.009. 119 AC volts and 12+ volts are at the controller. I contacted Dou Therm and they do not have parts to repair or upgrade these units. If they had the parts I would be willing to upgrade, but since winter is coming on and I have a disadvantaged veteran who was homeless living in my camper at the preset time, I would like safe heating. Also everything else works on this camper All I need for now is heat and was wondering if there was a way to run just the furnace without going through the rooftop A/C. I have extensive automotive and truck electrical experience so I feel confident that I could modify it for the winter until Dou Therm gets the correct parts. I'm sure that I would have to change out the thermostat, which is no big problem, if I know which one will work ... probably an older RV analog style. Any Ideas, since running electric heaters is going to be expensive and I don't like to try and draw 2-1500 watt electric heaters on the 30 Amp service. Thanx in advance for any help. Combat Vietnam Veteran Support our troops for serving our great country. 1997 Veri Lite RL1200 on a '02, K3500, CC, DRW, 8.1L, Allison, 4.1 gears, Bridgestone 225/70R19.5 tires. '12 C2500, EC, 6.6L Duramax A couple of older 5th wheels housing homeless vets. Roger10378 • View posts Goodrich, MI. Senior Member Joined: 05/29/2008 View Profile Good Sam RV Club Member Offline Posted: 11/02/22 06:56am Link  |  Quote  |  Print  |  Notify Moderator There should be 2 wires(probably blue) from the furnace to the controller. They need to go to the thermostat. The thermostat is just a switch that connects the 2 wires to turn the furnace on and disconnect the wires to turn the furnace off. You can test the furnace by connecting the 2 wires at the controller and the furnace should work. If the furnace works just extend the wires to the thermostat(common and heat) and you should be good to go. 2005 Cardinal 30TS 2007 Chevy 2500HD D/A garym114 • View posts Bluff Dale, Texas Senior Member Joined: 07/24/2006 View Profile Offline Posted: 11/02/22 08:54am Link  |  Quote  |  Print  |  Notify Moderator Don't know what thermostat you are using On the older analog Duo thermostat the yellow wire in the RV wiring harness runs the heater 2000 Sea Breeze F53 V10 - CR-V Toad Some RV batteries live a long and useful life, some are murdered. Get a Digital Multimeter and Learn How to Use It dougrainer • View posts Carrolton, Texas Senior Member Joined: 06/11/2007 View Profile Offline Posted: 11/02/22 10:05am Link  |  Quote  |  Print  |  Notify Moderator DOMETIC, NOT Duotherm I don't know who you talked to, but you CAN upgrade to the 5 button wall tstat and 5 button board on the AC unit. Are you positive you talked to Dometic and not one of those aftermarket companies that pops up on google searches and LOOKS like the company you are trying to find? Duotherm name has not been used in over 35 years even tho they may have the Duotherm logo on the AC shroud. You just need this kit in the link I have provided. The 4 button was discontinued in 2001 and they went to the 5 button. There are NO 4 button Tstats anywhere. Doug https://pantherrvproducts.com/3310009-00........48a235Nl76bHW34iU4F2OJp-nu4aAkP8EALw_wcB When you look at the pic in the link, you will see a blue ended wire. THAT is the NEW style freeze sensor and MUST be used. You remove the OLD style freeze sensor which looks like a large button about 1 inch in diameter. This link shows what it looks like. https://www.amazon.com/Dometic-3309191009-Freeze-Control-Sensor/dp/B00JF1WC0Q ScottG • View posts Bothell Wa. Senior Member Joined: 02/25/2005 View Profile Posted: 11/02/22 01:47pm Link  |  Quote  |  Print  |  Notify Moderator A 23 y/o RV furnace is far from safe (I lost a BIL that way). If you're going to have him using it, make sure there's a new Carbon monoxide sensor present. dougrainer • View posts Carrolton, Texas Senior Member Joined: 06/11/2007 View Profile Offline Posted: 11/02/22 04:42pm Link  |  Quote  |  Print  |  Notify Moderator I am assuming that the wall tstat has NO display? If so, replace the phone type modular 4 wire plugs at the wall tstat and at the AC upper control board first. Corrosion on those modular plugs is the normal cause of NO display. Doug Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  |  Oldest first Newest first  Open Roads Forum  >  Tech Issues  > Dou Therm 57915.622 won't work.

Search:   Advanced Search Search only in Tech Issues

Jump to Forum Dear Marcus  - Good Sam Roadside Assistance  - Good Sam Club  - Good Sam Insurance  - Camping World Accessories  - Camping World RV Sales  - Good Sam Extended Service Plan  - Camping World Service and Inst...  - Coast to Coast Recreational Vehicles  - Class A Motorhomes  - Class B - Camping Van Conversi...  - Class C Motorhomes  - Fifth-Wheels  - Folding Trailers  - Hybrid Travel Trailers  - Travel Trailers  - Truck Campers  - Toy Haulers Camping  - Tent Camping  - Family Camping  - Workamping Forum General Forums  - Beginning RVing  - Rallies, Shows and Gatherings  - General RVing Issues  - RV Lifestyle  - Full-time RVing  - Camp Cooks and Connoisseurs  - RVing with Disabilities and Ge...  - RV Pet Stop Technical Resources  - Tech Issues  - Do It Yourself Modifications a...  - Towing  - Tow Vehicles  - Dinghy Towing  - Technology Corner  - Forum Posting Help and Support Locations  - RV Parks, Campgrounds and Attr...  - Roads and Routes  - Public Lands, Boondocking and ...  - RVing in Canada and Alaska  - RVing in Mexico and South Amer...  - Snowbirds Other Discussions  - Around the Campfire

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