when i turn on ac it sounds like the heat flapper opens and then the heat turns on

Asked by Jul 05, 2013 at 04:25 PM about the 1999 Ford F-150 Lariat 4WD Extended Cab SB

Question type: Maintenance & Repair

ac was blowing cold then when I put truck in gear I hear the flapper switch over and then the heat comes on . a/c is fully charged

3 Answers

17,930

Is the a/c compressor running? If it is, then the a/c is probably ok. The problem is probaby in the mixture door actuator (electrical driven gear) if you have one or the blend door itself. Is the air coming out HOT (like having the heat on) or tempid like outside air?

1 out of 1 people think this is helpful.

Yes how do I fix it

Blows ac for a minute then I hear a thump then blows hot

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