Skip to main content ↑ ↓
Topic: No heat from Coleman roof unit. (Read 578 times) previous topic - next topic

No heat from Coleman roof unit.

Have an older Coleman roof AC/Heat unit giving me no heat. Not a heat pump model.
1)  I replaced the selector/function switch last year.
2)  I BELIEVE but cant prove it was working yesterday after a moving day
3)  Tried cycling temp controller with no success.
4)  Heating element cold to touch.

Blue and orange wires come from element into junction box with selector/function switch. Blue wire connected to another blue wire that exits junction box. Orange wire goes to a pin on back of selector/function switch.

Any suggestions as to where to check voltages (what pins to what wires)?
Resistance across heating element?
Any other ideas?

Re: No heat from Coleman roof unit.

Reply #1 –
No suggestions?

Re: No heat from Coleman roof unit.

Reply #2 –
unplug the element and see if its calling for heat through the plug(electric side).. if not element is bad?

Thought Coleman made tents ?  :))

Re: No heat from Coleman roof unit.

Reply #3 –
Hmmmm.
God forbid I try the simple stuff first.
That's a duh on me.

Re: No heat from Coleman roof unit.

Reply #4 –
Coleman is Dometic. Dometic is Coleman. I have two Coleman/Dometic ACs up on the roof of our '89 GV.

Re: No heat from Coleman roof unit.

Reply #5 –
UH, are you hooked up to 120V? ACs won't run/heat with 12V.

Re: No heat from Coleman roof unit.

Reply #7 –
The resistance heating element should be similar to ones used in water heaters and electric stoves.

If you unplug the element from the wiring harness it can then be tested for continuity with a multi-meter.

Touch probes to the two male (or female) wiring plug connection points on the element.

If no BEEP (open circuit) then element is bad (burned out).

Re: No heat from Coleman roof unit.

Reply #8 –
Quote from: nitehawk –
Coleman is Dometic. Dometic is Coleman. I have two Coleman/Dometic ACs up on the roof of our '89 GV.

That was a joke .. maybe I should have used a smiley face.. oh wait  ^.^d

Re: No heat from Coleman roof unit.

Reply #9 –
Quote from: DavidS –
That was a joke .. maybe I should have used a smiley face.. oh wait  ^.^d
We got it.
If you have 2 coleman dometic units, does that mean you have 4 total units up there.

Re: No heat from Coleman roof unit.

Reply #10 –
Quote from: Chuck & Jeannie –
The resistance heating element should be similar to ones used in water heaters and electric stoves.

If you unplug the element from the wiring harness it can then be tested for continuity with a multi-meter.

Touch probes to the two male (or female) wiring plug connection points on the element.

If no BEEP (open circuit) then element is bad (burned out).
AND I can verify the element is getting 120

Re: No heat from Coleman roof unit.

Reply #11 –
I have had Coleman heating elements fail in coaches long ago

Re: No heat from Coleman roof unit.

Reply #13 –
Of course you are correct.  No help at all.

Replaced dozens of elements and maybe a few controls.  I came from Coleman days long ago