where and how do i replace a temp controller that is faulty

1999 MERCURY SABLE
120 MILES
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ELAINE04
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had car checked by friend-put feron in,clutch is engaging,blind door is opening he thinks it might be the temp contol
Aug 17, 2012 at 8:32 PM
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ASEMASTER6371
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if the blend door is working, the control is working as it is changing from heat to cold.

what are the exact pressures for the ac??

Roy
Aug 17, 2012 at 8:37 PM
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ELAINE04
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not sure i just know that he put two 12oz cans in
Aug 17, 2012 at 8:45 PM
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ASEMASTER6371
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the amount of freon has to exact. there may have been freon in the system and he overcharged it.

you need to start at basics. the fren needs to be removed, evacuated and recharged with the exact amount and we need to see the pressures

Roy
Aug 18, 2012 at 5:28 PM