Good Sam Club Open Roads Forum: Class A Motorhomes: Coleman rooftop a/c


Open Roads Forum	Already a member? Login here. If not, Register Today! \| Help

Newest | Active | Popular | RVing FAQ

Forum Rules | Forum Posting Help and Support | Contact

Open Roads Forum > Class A Motorhomes > All

Reply to Topic | Subscribe | Print Topic | Post New Topic |

mfinnerty

Wentzville, Mo.

Senior Member

Joined: 05/02/2007

View Profile

Good Sam RV Club Member

Offline

Posted: 01/15/23 01:17pm

Link | Quote | Print | Notify Moderator

I have a dumb question. Where is the temp sensor for the rear or what triggers the rear ac/heat pump or furnace to turn on? Maybe the answer points to the solution. Both my last MH and my current MH have thermostats in the front and rear.

Mike & Linda Finnerty with Finn & Rosco (Golden mix brothers)

dougrainer

Carrolton, Texas

Senior Member

Joined: 06/11/2007

View Profile

Offline

Posted: 01/16/23 11:31am

Link | Quote | Print | Notify Moderator

https://www.amazon.com/Coleman-83305191-........07-8b92551a3e5c&pd_rd_i=B019QH3QVC&psc=1

It looks like this and can be brown also. It is usually located in the rear bedroom area on the wall. Some OEM's install on the ceiling, but this old of a RV it is probably on the wall or bottom of a bedroom overhead cabinet. Lack of or a bad sensor would not cause the problem he has. Doug

jaycocamper62301

Illinois

Senior Member

Joined: 10/10/2007

View Profile

Good Sam RV Club Member

Offline

Posted: 01/16/23 12:17pm

Link | Quote | Print | Notify Moderator

swap control boards and watch the problem follow the board and then buy a new board on Amazon. Been there done that. I bet thats your problem

Bamshell

Orlando

New Member

Joined: 01/13/2023

View Profile

Offline

Posted: 01/19/23 03:36pm

Link | Quote | Print | Notify Moderator

Finally fixed!! After buying a new control board and 2 thermostats it ended up being a $20 temp sensor for the coil which was actually the very first thing i looked at.. i tested both for continuity and neither had it so i ruled it out because 1 unit was working fine. Turns out i needed to ohm it out. The giod one had 11k ohms and the other was 80k ohms.. i swapped them out and then the unit worked.. in hind sight i see why it would let the heat pump come on and not the a/c. 6 hrs of trouble shooting and it was the very first thing i looked at. Oh well hope this helps someone!

dougrainer

Carrolton, Texas

Senior Member

Joined: 06/11/2007

View Profile

Offline

Posted: 01/21/23 10:13am

Link | Quote | Print | Notify Moderator

Bamshell wrote:

You said in your first post HP function, the compressor would not come ON. Now you say it worked in HP mode but not in COOL mode. Doug

You state TEMP sensor for the coil. Do you mean the FREEZE sensor installed in the evaporator? If so, that part is NOT supplied when replacing a complete upper unit. And yes, that defective part will keep the compressor from running.

Reply to Topic | Subscribe | Print Topic | Post New Topic |

Open Roads Forum > Class A Motorhomes > All

	New posts		No new posts
	Closed, new posts		Closed, no new posts
	Moved, new posts		Moved, no new posts

Adjust text size:

Terms of Use | Privacy Policy | Do Not Sell or Share My Personal Information | Targeted Advertising Opt Out | California Privacy Rights