No heat from heater

Tiny
QUETSY
  • MEMBER
  • 1999 FORD WINDSTAR
  • 6 CYL
  • AUTOMATIC
These is no heat coming from the vents of my car, were do I look first?
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Tuesday, December 20th, 2016 AT 9:12 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Make sure the coolant is full. Make sure the engine is warming up to a normal operating temp. With the engine running, hot, and the heater on, feel both heater core hoses. Both should be hot. If only one is hot, flush the heater core. If both are hot, check the blend door.
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Tuesday, December 20th, 2016 AT 9:12 PM (Merged)
Tiny
ALMARLBORO
  • MEMBER
  • 1998 FORD WINDSTAR
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 260,000 MILES
Heater problem
1998 Ford Windstar 6 cyl Front Wheel Drive Automatic 260000 miles

when I turn on the heater, the fan of raditor start
and that make the temp for the engine go down to zero and the air for the heater start come cold & cold
please if you can tell me how I can fix this problem special we are now in winter & I need to use the heater.
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Tuesday, December 20th, 2016 AT 9:12 PM (Merged)
Tiny
SCHRIMPIEMAN
  • MEMBER
When using the heater, try using the "Vent" option on the selector dial, with the temperature dial set to red (warm/hot) setting. Vent should be just in-between the "A/C" selection and "Off". Using the selector switch on defrost setting or anything other than "vent" causes the A/C to kick in, alas causing the radiator fan to turn on.
As for your engine temp to go down, I suspect you may have a stuck open thermostat. A properly operating thermostat would prevent the engine from over-cooling regardless of the radiator fan being on or not.

It should go without saying that you need to make sure the heater has its radiator hoses attached, and the hoses (generally 3/4 inch ID) must not have any kinks preventing water flow. The cabin heater works by circulating the engine coolant through it. No hot water = no cabin heat.

Good luck.
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Tuesday, December 20th, 2016 AT 9:12 PM (Merged)

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