budwich wrote:
OK... so now you are getting to the "root cause" of the problem... although you didn't indicate why the ac was changed out.
Basically, there are "considerations" when trying to wire an AC unit in a travel trailer. The heating / furnace work on 12v systems entirely while the AC needs 120v... so there are different relay "options" that need to be used. Dometic offers a "few" different ones. Overall, the system is relatively simple in terms of electronics and tracing IF you have a little electrical knowledge and a meter. My guess based on my limited experience converting / adding a digital thermostat to my system (which is coleman based I think). The fan selection / speeding will not having any effect on the furnace operation as the furnace control takes care of it all. Basically, the thermostat just causes an "ON/OFF" function based on the temperature.
The AC side has more "considerations". My old dometic analog only had heating (two wires only) so I don't have much more to go on other than what I have read on the various sites.
Again, you need to look at the wires that are at the thermostat (copy down the terminal and color) then "trace" this over to the "jumble" and see which colors show up there, and then even further, you need to see which wires go where inside the AC "box" where the relays and others terminals are. From there, it will likely be possible to understand the issue... hopefully.
I guess depending on what the "work order" was with the install company, their stance of "it will cost you" is probably "reasonably" IF it was stated as "replace my AC UNIT" which they did. It appears that the "real problem" was never addressed or "paid for" to get resolved.
Thank you so much for all your info. It is very helpful. They were told to fix the AC. We never told them to replace it. The girl that works at this RV place was the seller's best friend.(girl we bought it from) She just told us they would look at the AC and fix it and said it might have to be replaced. They told us it was the compressor!! and also told us they tested the system.
