Car heater and defroster

Tiny
OYESHECAN
  • 1993 LINCOLN TOWN CAR
  • V8
  • AUTOMATIC

What is causing my defroster not to work, my heater works one day then the next time it does not. It sounds like its trying to start but can't.

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Friday, February 4th, 2011 AT 2:25 PM

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Tiny
MMPRINCE4000
  • EXPERT
  • 8,710 POSTS

Quickly touch the top and bottom heater hoses, if both are hot, then you may have a diverter valve bad, or blend door.

If both are cool then thermostat, if one hot and one cold then heater core is partially blocked.

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Friday, February 4th, 2011 AT 2:33 PM

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