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Discussion Starter #1
Hello all this is my first visit and post. Im sure you guys can help so heres the problem. I have a heat pump, (package i guess, its all outside). Im not a pro at this hvac stuff yet, but can change stat, capacitor and motors and such, but am confused about this. I can turn the heat on and the unit runs fine, no issues at all with heat. When i switch to ac, I get nothing but the blower fan in the unit. If the capacitor was bad, wouldnt it stop the compressor from running in the heat and ac position? :confused1:
 

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I'm Your Huckleberry
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Hello all this is my first visit and post. Im sure you guys can help so heres the problem. I have a heat pump, (package i guess, its all outside). Im not a pro at this hvac stuff yet, but can change stat, capacitor and motors and such, but am confused about this. I can turn the heat on and the unit runs fine, no issues at all with heat. When i switch to ac, I get nothing but the blower fan in the unit. If the capacitor was bad, wouldnt it stop the compressor from running in the heat and ac position? :confused1:
Yes. Are you saying the compressor is running in cool mode or not running?
 

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When in heat mode, did you actually see the outdoor can running and hear the compressor running, ot did you just check for warm air at the registers?
 

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Yes i can see and hear that the compressor is running in heat mode. Also I have hot air coming from the vents. It just will not run in cool mode, only the blower fan runs, I have room temp air coming from the vents, and the compressor or fan do not run. Its very confusing.
 

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Compressor is not running in cool mode. I have air coming from vents but its just room temp air. No matter where i set the stat, the compressor will not come on in cool mode.
 

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The call/signal for the compressor to run comes through the same wire for heat as it does for cooling.

Its possible that your unit has a low pressure switch, and its shutting the outdoor unit down in cooling mode because the pressure is too low.
 
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