Community Forums

RYandris · 05-20-2013, 08:02 PM

I have a 39 ft 2006 Grand Junction 5th Wheel and the main air conditioner (roof mounted) which is thermostat controlled will not come on. The light indicators which used to blink red when on is dead and nothing indicates power. I have checked the main breakers and nothing is tripped. I am at a loss.

Thanks for your input.

Roam America · 05-21-2013, 11:34 AM

when you checked the breaker, did you turn it off and then back on? most circuit breakers, when tripped, the tab only moves slightly and can be mistaken for set OK.

BFlinn181 · 05-21-2013, 11:55 AM

Your thermostat is 12 v, have you checked the batteries and fuses in that system? Is the house battery switch on? Does the fridge work? (RV fridges also use 12 v to control 120 and propane) You must have 12 v power to control the Air Conditioner(s) water heater, refrigerator, CO and propane detectors, etc. Also check battery connections and ground connections.

jamvir · 05-21-2013, 01:12 PM

Will the fan turn on - if it is in fan only mode or A/C mode?
Will the furnace turn on?

BFlinn181 · 05-21-2013, 02:24 PM

No, all controls need 12 v power to operate. AirCpn fan is 120 v, but it needs signal from thermostat to operate. Furnace fan is 12 v, but it also needs signal from thermostat. Do your interior (12 v) lights work? Do you have a battery isolation switch (often near the door) to shut off batteries when in storage? That switch must be in the on position at all times unless unit is in storage and not connected to shore power.

RYandris · 05-21-2013, 11:30 PM

Thanks so much for all of the answers you all have given. In response to "will the fan turn on?" No...nothing happens. There is power to everything, all lights and appliances. No fuses have been blown and I have re-tripped the breakers just to make sure but I get nothing. water heaters and everything else controlled by 12V works just fine. I am starting to think it may be a thermostat issue as there is no life in it at all. It is remote controlled or manual. Neither works. I guess I will have to have a mobile RV repair help out. I am at my Wits end with this.

Jamvir....I am not sure if the furnace will turn on as it is all controlled by the thermostat.

Again, thanks. You guys gave me a good check off list.

Skip426 · 05-21-2013, 11:43 PM

If you just arrived, at the site your in, and it has 50 amp service , check that both power legs in the post are live. Hate to pay a call out for a mobile and find out the issue is in the park wiring.
Don't know if this applies , just a thought.