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Randall
Randall, RVIA Certification
Category: RV
Satisfied Customers: 10484
Experience:  RVDA/RVIA Master Certified Technician with many years experience.
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I cant get the a/c to work ,checked the breaker and fuses

Customer Question

I cant get the a/c to work ,checked the breaker and fuses
Submitted: 9 months ago.
Category: RV
Expert:  Randall replied 9 months ago.

Make and model of the A/C and brand and style of your thermostat?

Customer: replied 9 months ago.
RVP thermostat ...Chillgrille a/c
Expert:  Randall replied 9 months ago.

Do you have a model number and the part number off the thermostat? It is usually on the back. I need that information in order to direct you in some testing. Coleman has dozens of variations in both.

Customer: replied 9 months ago.
Nothing on the thermostat it's either a 8330 or a 8530
Expert:  Randall replied 9 months ago.

lt is usually on the back and if you take it off the wall, you can see it. OR tell me how many wires are coming out of it.

Expert:  Randall replied 9 months ago.

You will need a small digital multimeter for some testing here. That thermostat should have a fuse inside if you remove the cover. There will also be a fuse in your load center which may be identified as a fuse for the furnace. Some RVs are wired up so that the furnace circuit supplies the 12 VDC to the A/C controls.

Customer: replied 9 months ago.
There is a stamp..PS6 ...6 wires coming out
Customer: replied 9 months ago.
I checked the fuse. It's good what am I looking for with the multimeter..what colors will have power if any
Expert:  Randall replied 9 months ago.

The red should be the incoming 12 VDC positive lead and the blue the incoming 12 VDC negative lead. You should be about 12+ VDC between the two. A meter can show this. Is this a digital model or analog slide control?

Customer: replied 9 months ago.
Ok I've got the power now what
Expert:  Randall replied 9 months ago.

Is this a digital or analog thermostat?

Customer: replied 9 months ago.
Analog
Expert:  Randall replied 9 months ago.

No part number on the back? 4 numbers a letter and then 3 more numbers?

Expert:  Randall replied 9 months ago.

Go to the attached link and print this out. It gives the wiring and colors. With your meter you need to verify that there is 120 VAC to the A/C up in the ceiling. This can be an issue with the 12 VDC side or the 120 VAC side. A meter can help narrow this down. http://www.cleggind.com/postal_tech/pdfs/AC2/airxcel_1976376%5B1%5D.pdf

Expert:  Randall replied 9 months ago.

Just checking back in to see if you were able to resolve this or do you still need some additional input from me here?