Camper Air Conditioning
PTCR WSX-7 MOTOR STARTER
The compressor kicks on and this part was sparking.
Resetting the AC System
I posted this on the 2007 model year quality thread, because I reported the problem there, but it seems like it should go here also.
On our last night out, our Dometic air conditioner stopped working. It had been working fine in the 95-degree FL day and keeping the inside at a comfortable 74 degrees. Then about 5:00 p.m., it just would not come back on. After checking everything I could get to without getting on the roof, we switched the unit off. The voltage was on the low side, but still in the green area of our plug-in meter. We left to get some dinner, and buy a fan so we could have a tolerable night.
When we returned a few hours later, it came on again, but after cooling the inside down to the set temperature, it switched off never to come on again. Voltage was in the middle of the green area. We had a warm but comfortable night thanks to the fan we bought.
I called Airstream and they said to take it to the nearest Dometic Factory Authorized Service Center. Last Friday I towed our Airstream to Giant RV World; Melbourne, FL. The technician ran through his diagnostics and could not find anything wrong. He reset the controller, and the unit ran for several hours performing splendidly. I asked him to show me how to do the reset if it happened again. Here is the process:
- Switch unit off with the on/off switch on the thermostat
- Hold down the top (Mode) and bottom (Zone) buttons.
- Switch the unit on.
- When FF appears in the display, release the buttons.
- Unit should now operate normally.
I hope that I don't have to do this again. If I do and it gets to be a frequent activity, I'll be returning to the service center asking for a new controller. Everyone should take note of this procedure, as I couldn’t find it in any of the factory literature.
Thanks Lew, for posting the start capacitor and PTCR service instructions. I'm filing both of these procedures in my "Junior RV Tech Manual."