Question about Carrier 52CQ315 Air Conditioner

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Fan quits and the compressor still runs

You turn on the cool on the thermostat the fan runs for about five minutes and quits but the compressor still runs and so does the air handler?

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  • fondrenjack May 27, 2009

    not real sure just bought the house about 3 months ago

  • fondrenjack May 27, 2009

    Yes its a split residential unit. yes the motors realy hot. And today i put a knew fan motor on it and it does the same thing.

  • fondrenjack May 28, 2009

    I appreciate the help I got it figure out. The old motor had three wires the new had four. So i took off the brown white wire and it runs like a dream.So i guess you don't need the brown and white wire on my unit just the brown, black and yellow.

  • fondrenjack May 28, 2009

    Yea I realy appreciate your help. I have better undersdtanding now

  • Ken Bledsoe May 11, 2010

    Is your unit getting a little old. Sounds like the fan motor is going bad.

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Is this a split residential system. it sounds like you are talking about the condenser fan either way it seems like the fan is overamping and tripping on thermal overload which is a device in the motor that protects itself. when you shut it off for a while and turn it back on does the fan work. if you turn it off then turn it right back on does the fan work. when it shuts off is the motor really hot. if possible, and you know how, check amp draw. typically you can find the rated amp draw on the motor nameplate.

Posted on May 27, 2009

  • shizznat May 27, 2009

    when u put the new motor on did you also replace the capacitor. if the caps not working correctly this can also be a cause. the new motor you have should say what size capacitor the motor needs i always install new caps with new motors. 5 or 7.5 mfd capacitor is most likely what u will need but you will have to check the motor nameplate to make sure or the box it came in might have it on the outside. with out the right meter you wont be able to check the capacitance of the existing cap. also make sure the fan prop is positioned right and turning the right way pulling through the coil and out the top as this is the most common flow of condensing units. if u can check voltage and amps if you have a meter and are capable. make sure power is off before replacing capacitor cause it will bite. when checking nameplate make sure you are reading the new motor for cap size and not the old one.

  • shizznat May 28, 2009

    three wire hook up or 4. the differance is in the capacitor. the brown and the brown and white is for a permanent split capacitor which is the motor runs of its own capacitor and uses the two wires on each pole of the cap. 3 wire hook up is with a dual cap which charges the condenser fan and compressor but uses the same common. cap com fan are the normal connections on the dual cap. now if u had a brown and a brown and white with you're four wire motor u can use that either with a split cap by putting the brown on one terminal and brown and white on the other. u obviously have a dual cap which only uses the brown and u cap off the b/w wire make sure u cap the unused wires because any unused wire on there can short to the housing. good job on figuring that one out caps are hard for people to understand sometimes.

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Air handler runs & stops after a short time

Posted on Jul 07, 2012

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