Mechanics

FRONT A/C WORKS SOME DAYS AND NOT OTHERS

2000 Ford Expedition • 120,000 miles

My rear a/c always works perfectly. My front a/c will work all day sometimes and other times not at all. And some days it works off and on as you drive. I've checked the pressure and refrigerant level and everything is normal.

I've read a number of online posts and I've seen suggestions from actuators and blend doors to evaporators and thermostatic switches, but, the symptoms for those items don't seem to quite match my situation.

Any suggestions?

Thanks.
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Bunyon2
June 7, 2012.



When it doesn't work what does it do? Not blow air? Not cold what?

Hmac300
Jun 7, 2012.
When its not working is the blower not blowing or the air temp not cold. If the rear temp is good then the r134a level should be good.

Djcl
Jun 7, 2012.
Sorry, I wasn't clear. The air still blows but it's hot air. There is no decrease in the air flow at all.

Tiny
Bunyon2
Jun 8, 2012.
I would start with checking the r134a pressures. The best way is to suck it out and see how much you recover. Then charge with the corect amount.

Djcl
Jun 8, 2012.
Check your actuators the rearand front use the same a/c chargeand you say it works sometimes and other times it doesnt'. You may have a lazy actuator or it'snot getting vacuum/electric and dnot working. It would be the actuator that controls temp

Hmac300
Jun 8, 2012.