2001 Ford Ranger Heater stops working when truck idles

Tiny
SAKRANMM
  • MEMBER
  • 2001 FORD RANGER
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 131,000 MILES
When I am driving with the heat on, it works fine. But when I come to a red light for more than a few seconds, the heater temperature drops dramatically. When I start moving again, the temperature is fine.
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Friday, December 28th, 2007 AT 3:38 PM

1 Reply

Tiny
MERLIN2021
  • EXPERT
Try warming the Vehicle, then carefully feel the heater hoses, are they both hot? If one is cooler than the other, You need to flush the core, or do a replacement job on the heater core. Also if the system has a heat control valve on the heater hose, make sure it is working! Also check the thermostat, and the temperature blend door, thats under the dash, in the heater plenum.
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Friday, December 28th, 2007 AT 4:43 PM

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