Replaced the mother (control) board, changed the thermostat. Sometimes when we shut off the breaker, it starts working for awhile, then goes right back into the same problem. Furnace is only 6 years old, and has had problems for 5 years now!!!
I wish I was a furnace expert but I will give a push in the right direction. When a gas/electric fan runs it has two speeds. When you turn on the FAN ON switch it should run at the slower speed. If it doesn't turn on or turn off again when you turn it back you have a wiring problem or a thermostat problem. Make sure the thermostat is compatible with your unit and wired properly (on both ends). The other time the fan runs is "in session" when heat or cooling is applied to the system. It should run until the system finishes the cycle then a bit more (30 seconds or 1 minute) to blow the treated air completely through the ducts. If it doesn't stop then you may have a bad fan time delay or relay. Check parts for your model and various appliance repair site online.
I wish I was a furnace expert but I will give a push in the right direction. When a gas/electric fan runs it has two speeds. When you turn on the FAN ON switch it should run at the slower speed. If it doesn't turn on or turn off again when you turn it back you have a wiring problem or a thermostat problem. Make sure the thermostat is compatible with your unit and wired properly (on both ends). The other time the fan runs is "in session" when heat or cooling is applied to the system. It should run until the system finishes the cycle then a bit more (30 seconds or 1 minute) to blow the treated air completely through the ducts. If it doesn't stop then you may have a bad fan time delay or relay. Check parts for your model and various appliance repair site online.
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SOURCE: compressor tries to turn on but cant.
Try changing out the start up and run capacitors for the compressor.
SOURCE: Coleman (RVP) 7000 AC unit compressor problem
I had a problem with my coleman mach 3 AC, we were at an RV park up at lake shasta CA and the fan would stay on but the compressor would come on for a few seconds and then trip off. It was the motor overload relay on the compressor that was tripping. the RV park was old and apparently the wiring to the panelboard at the RV park was too small, when you are drawing a lot of current there was too much voltage drop across their line, to make up for this the motor tries to draw more current and heats up the motor overload and it trips off. I solved this problem by buying an autoformer from Camping World, it senses a voltage drop and automatically boosts the voltage.
I am now having a seperate problem, the compressor is either locked up or has too much back pressure and trips off the service breaker when trying to start. The only solution I can see with my current problem is to replace the entire unit.
SOURCE: Coleman A/C-Heat Pump Start and Stop Run Problems
well you have it great job! on the out door unit when it will not shut off disconnect the yellow wire on the stat wires coming from inside if unit stops stat bad if not contactor "points' if they look pitted or buzz change them #1 reason for compressor failure high amp draw thru bad contactor hope this helps aboout 15.00 at hvac store seperate wires with zip ties so dont get mixed up if only one set of points then 30amp single pole 24vac coil contactor
SOURCE: air conditioning runs all the time
I assume this is a manufactured home, this is probably a two transformer system, either your contactor is welded in the on positon or wyou have control wiring issues, (could be the thermostat)
SOURCE: thermostat keeps blowing fuses
There is a short in one of the thermostat wires. The fuse is triggered on the low voltage side of the unit. Replace the wires.
Testimonial: "Thanks for the info ,I will try this"
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