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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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Trouble with our AC - when we move the slide on the

Customer Question

trouble with our AC - when we move the slide on the thermostat the fan comes on and makes a sound like the ac is trying to come on, but it doesn't. It does finally come on, but the fan stays on even after the temperate is where we wanted it. We are full time RV'ers and live in a 2011 Rockwood Windjammer and have for the last 5 years. The unit has been serviced and this year we had it cleaned by a professional. Need to know if you think its the motor or something else. Please advise. Thanks, Willis ***************************************
JA: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat?
Customer: we think it is an AC problem
JA: Do you plan on doing the work yourself?
Customer: yes
JA: Anything else we should know to help you best?
Customer: sometimes when the unit is first turned on it sounds like the motor is seized up but after a few times turning on and off it turns on
Submitted: 10 months ago.
Category: HVAC
Expert:  Phil replied 10 months ago.

Hello, is this happening on shore power or when the AC is running on the motor homes generator.

So far it sounds like a voltage regulation issue from the generator if this is happening on generator power, or a weak run capacitor if the AC is running on RV park (shore) power.

Expert:  Phil replied 10 months ago.

The fan running all the time should not be related, look for a FAN switch on the thermostat and set it to 'auto'.. if your thermostat has that feature.

Customer: replied 10 months ago.
always on shore power
Customer: replied 10 months ago.
sorry we'll take it from here thanks