Question about Friedrich QuietMaster Electronic SS12J30D Air Conditioner

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Compressor failure, sends out hot air

Compressor will not stay on, runs for about 25 seconds

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Hi,
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heatman101

Posted on Jun 03, 2010

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Why did you change compressor? If for failure, or even just changed because not cold, did you flush out entire system? Compressor failure can lead to a clog in the high pressure line. The low pressure line will usually become very cold-may even ice up- but the receiver/dryer will not be very cold to touch. Monitor your head pressure and make sure your pulling less than 25 lbs. on low side 75 F ambient. High side should not exceed 300 lbs.
Charge weights should also be exact as overcharge has same results as undercharge-hot air. If all is good under hood and head pressures o.k., look for debris build up on evaporator core in air box under dash, clean as required. Also make sure blend door is closing properly and heat is not staying on.

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