Vaccum leak

1999 FORD RANGER
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FIT4DUTY
  • MEMBER
  • 2 POSTS
I have a possible vaccum leak on my 99 Ranger Is it the hose or the switch that would need replaced?
Jul 13, 2011 at 4:39 PM
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FIT4DUTY
  • MEMBER
  • 2 POSTS
The A/c switches back and forth to defrost when the truck is accelerated
Jul 13, 2011 at 5:12 PM
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CARADIODOC
  • ✓ASE Certified Mechanic
  • 34,321 POSTS
  • ASE Certified Mechanic
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.
Jul 13, 2011 at 6:00 PM
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