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Scott W.
Scott W., Ford Technician
Category: Ford
Satisfied Customers: 3288
Experience:  28 yrs. experience as Ford ASE Master Technician. Accolades include being a 2005 Ford PTS Regional Finalist and 2006 ASE Ford National Technician.
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Ford fiesta: 2011 Ford Fiesta AC compressor periodically coming

Customer Question

2011 Ford Fiesta AC compressor periodically coming on ; Blows hot when you come to a stop but comes back on when on highway; just recharged;
Submitted: 1 year ago.
Category: Ford
Expert:  Scott W. replied 1 year ago.
Hello my name is Scott
Expert:  Scott W. replied 1 year ago.
Is the engine cooling fan running? What are the system pressures when it isn't cooling?
Customer: replied 1 year ago.
according to the "tech" pressures were good -- no leaks; No I don't think the fan was running actually -- So "if the coolant temp is too high it will keep the compressor from engaging" ?
Customer: replied 1 year ago.
What could be wrong with the Fan? How much is it to replace? what else could be wrong if not the "radiator/cooling" of the engine (periodic compressor engage when at highway speed)
Expert:  Scott W. replied 1 year ago.
Could be a bad fan. Open circuit. The fan needs to run when the ac is on or it will quit cooling. Going down the road you don't need the fan unless it is really hot out.
Customer: replied 1 year ago.
This would cause the compressor clutch to "not engage"? Then it is true that a hot radiator will "keep the clutch from engaging"?
Expert:  Scott W. replied 1 year ago.
Yes, if the engine temperature is too high, the computer will shut down the ac system since it takes more cooling when the ac is on.
Customer: replied 1 year ago.
Ok. .. otherwise what are other common failures with the symptoms I described....please list all thank you
Expert:  Scott W. replied 1 year ago.
Here is a list of all possible cause from workshop manual. The air conditioning (A/C) is inoperativeFuse(s)Wiring, terminals or connectorsA/C system discharged/low chargePCMHVAC moduleA/C clutch relayA/C compressor clutch air gapA/C pressure transducerEvaporator discharge air temperature sensorA/C compressor clutch field coil
Customer: replied 1 year ago.
Are any of these are linked to SYNCH?
Expert:  Scott W. replied 1 year ago.
No they aren't, are you having sync concerns also?
Customer: replied 1 year ago.
No...i have no indicators in my SYNC report...so I would expect a failure code with some of the items listed...ie PCM; Is that a safe assumption?
Expert:  Scott W. replied 1 year ago.
Yes you are correct, something needs to be coding to to be listed.
Expert:  Scott W. replied 1 year ago.
PCM, module, ect.
Expert:  Scott W. replied 1 year ago.
Do you have any more questions?
Customer: replied 1 year ago.
Not now..i will finalize tomorrow
Expert:  Scott W. replied 1 year ago.
Ok sounds good, thank you.
Customer: replied 1 year ago.
Thank you
Expert:  Scott W. replied 1 year ago.
Not a problem, if need anything answered we are here.

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