- Nov 17, 2023
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I have a thru the wall AC unit which no companies will service hence DIY I am a licensed electrician and worked on larger units many years ago. My unit is blowing cool air but not cool enough. The unit uses 410A refrigerant it calls for a low psig of 300 and a high psig of 500. These are terms I'm not familiar with. With the unit running the refrigerant reads about 120psi. But the compressor is only drawing about 1/2 it's rated amps. The coils are all clean as is the filter. Blower fans are running fine. The line coming off the compressor is cold just not cold enough. Can anyone tell me what to check or why the capacitor would not be drawing full amps.