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Ac is not blowing cold in RV. Coleman mack. Compressor not

Customer Question
coming on. Any suggestion other...
Ac is not blowing cold in RV. Coleman mack. Compressor not coming on. Any suggestion other than buy a new one
Submitted: 2 years ago.Category: HVAC
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Answered in 5 minutes by:
7/19/2015
HVAC Technician: Phil, Mechanical Engineer replied 2 years ago
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6,938
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified
Hello,
Locate the thermostat, it is directly behind the thermostats temperature control knob in most cases... if you find that, turn the power off, remove the two wires attached to it and connect them together with a heavy alligator clip or some such item.
If the compressor runs, replace the thermostat.
Beyond that level diagnosis is more difficult. Tell about how old the unit is, and a bit about your technical skill levels, we can go from there.
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Customer reply replied 2 years ago
I don't see thermostat. Trying to get cover off
HVAC Technician: Phil, Mechanical Engineer replied 2 years ago
Is there a temperature control knob that you use to set the temperature, or a push button pad?
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Customer reply replied 2 years ago
No but I found thermostat. It has three wire. It is a turn switch and all together
Customer reply replied 2 years ago
Sorry 4 wires. Two white a yellow and blue. Blue goes to plug not connected to anything
Customer reply replied 2 years ago
This is a Coleman Mack RV roof mounted unit
Customer reply replied 2 years ago
Are you still there?
Customer reply replied 2 years ago
Houston we have a problem
HVAC Technician: Phil, Mechanical Engineer replied 2 years ago
Hello again, I am here, but I cannot stand by, I have to answer an ongoing stream of questions and do research etc, and of course type my responses.Next locate the wiring diagram for the unit that shows that switch and I will mark the diagram up with trouble shooting instructions. Use the paper clip icon at top right to attach the picture. We can go from there.
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Customer reply replied 2 years ago
Using old I pad. Not able to do that but I did find schematic and jumped the blue and white wires going to compressor. Is the two capacitors in the compressor serviceable. We have 119 going to them and compressor is still no kicking in
HVAC Technician: Phil, Mechanical Engineer replied 2 years ago
Hello again, without a wiring diagram my hands are tied. I will opt out and hope someone else here will be able to assist.
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Customer reply replied 2 years ago
Thanks again
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Phil
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6,938
6,938 Satisfied Customers
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial

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