Question about Coleman Propane Forced Air Heater w/Electronic Ignition (50,000-80,000 BTU)

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Colman furnace I have a 75 dodge rv with a colman furnace. I need to find a place to get the wiring schematic to hook up the thermostat. Any help would be appreciated.

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Look on your burner control relay - look for terminals marked T and TH.  connect up a honeywell thermostat here.

Posted on Oct 15, 2007


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I have a Dometic DuoTherm ac/furnace unit in an rv. The thermostat got knocked off the wall and now the ac nor the furnace will work. Fan works in manual position only. What could be wrong?

When the thermostat was knocked off it may have damaged the wiring. I would start by checking continuity of all wires from thermostat to unit.

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Check for a bad thermostat and wire by jumping the red and white wire together at the thermostat. If the unit fires, you have a bad thermostat. If it does not, jump the R and W terminals at the furnace (or where ever the thermostat wires are connected to). If the unit fires you have a bad wire. If it still does not fire, you have an issue with the heating system not the thermostat or its wires.

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I have a DuoTherm BriskAIr 13.5K BTU. The Dometic thermostat also controls my HydroFlame 8531-IV furnace. This morning, the furnace would not come on. I checked the wiring and there is no voltage at the...

If you look at control box at roof unit, they usually use a separate set of wires for furnace. See what colors they are attached to at harness to thermostat. Some just follow other harness, and come out at thermostat. (bypass control box) Once you've determined which 2 they are, join them together & see if furnace starts, as it should. If it does, thermostat is faulty. If not, pull outside cover off & check voltages at furnace. I'm guessing by furnace model that your unit is approx 30 ft , but if it's a park model, you may have 24 volt system on furnace or 12 volt. Another way of confirming is to go to back of furnace where air intake grille is inside your unit, and locate 2 blue wires going to furnace & remove whatever wires are attached to them & connect them together. Furnace should start up.

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I have a travel trailer with a roof top a/c colman mach111 and I hooked up a thermostate digital. The heat works but cant get a/c to come on. the termanials on hunter thermostate are G W Y RC RH

OK, the wiring that you should have in your RV is as follows: Red White Blue Yellow Green Gray.

This Thermostat will not work on this Air conditioner because the tstat you are installing is a 24V thermostat. The connections are as follows G = Fan, W = White, Y = Cooling, RC = 24V Cool, RH = 24V. The only thing that I can think to do is hook it up like so.

On the G Terminal, Hook up the Green wire from the wall. On W, hook up the White wire, Y, hook up the yellow wire. RC = run a jumper from the RH terminal, RH = hook up the red wire. If this doesn't work then you will have to go back with the coleman thermostat.

Jul 03, 2009 | Heating & Cooling

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