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I change the capacitor and cleaned all of the coils inside the interior unit and outside along with the fins and the blades with a professional solution. I had the HVAC refrigerant filled. I cleaned the water pump which circulates the outgoing water which was filthy. I also replaced the thermostat I don’t know what else it could be but the compressor.

Why would the unit still be running with a compressor that is not working? And also is there a way to check it without replacing it to see if it actually bad?

By the way the electric dryer vent is located directly above the outside unit. Why would anybody put it there is beyond my comprehension?

  • Is this a heat pump? If so you may have disturbed the wiring to the reversing valve, which is usually next to the compressor. – Phil G Jul 26 at 20:18
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    To answer your add-on question, the dryer vent would have little impact on the compressor function. It won't affect the temperature of the air drawn through the cooling fins significantly. – isherwood Jul 26 at 20:21
  • Phil G , It is an electric a/c -heat pump. You think I may have disturbed wiring in the outside unit? A few days ago at least the coils in the interior of the unit were cold. Today I ran it all day while I was at work with two window units and the interior coils are not cold at all. Please pardon me this is the first time I’ve used this app. Thank you! – Donna R Jul 26 at 20:43
  • I will check that now as I have company coming this weekend a good time for the AC to malfunction ! Thank you so much I’ll give you a update! – Donna R Jul 26 at 20:46
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    @isherwood the heat from the vent would not be an issue, but I had a similar setup, the condenser was extremely effective at picking up all the lint from the dryer vent, and was completely clogged over 50% of its area, – Phil G Jul 26 at 21:39
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If the unit was working somewhat fine and you were simply doing much appreciated maintenance to restore its past performance, then you mixed up the wiring during the new thermostat install.

If the unit wasn't cooling and therefore prompted the maintenance, then it would likely be that the TXV (Thermal Expansion Valve) needs to be replaced.

If the unit's inside coil was hot, then the Thermostat wiring is screwy...assuming it's set to Cool and not Heat. If the inside coil wasn't hot, then the Thermostat is still wrong, but you fortunately discovered before heating season that the Reversing Valve needs to be replaced.

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