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Vaccum leak

Tiny
FIT4DUTY
  • MEMBER
  • 1999 FORD RANGER
I have a possible vaccum leak on my 99 Ranger Is it the hose or the switch that would need replaced?
Wednesday, July 13th, 2011 AT 4:39 PM

2 Replies

Tiny
FIT4DUTY
  • MEMBER
  • 2 POSTS
The A/c switches back and forth to defrost when the truck is accelerated
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Wednesday, July 13th, 2011 AT 5:12 PM
Tiny
CARADIODOC
  • MECHANIC
  • 33,916 POSTS
Most systems are spring-loaded to default to defrost when vacuum is low or lost. That's a safety thing so you're feet might freeze but your windshield will be clear. Look for a check valve in the hose feeding the controls. If the valve is okay, Chrysler has a replacement with a built-in storage canister to address this problem.
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Wednesday, July 13th, 2011 AT 6:00 PM

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