MY HEATER WILL NOT BLOW HEAT EVEN THROUGH THE ...

  • Tiny
  • ken cooper
  • 1965 Ford Mustang
  • 61,000 miles

My heater will not blow heat even through the blower works plus when the engine warms up water will flow back through the over fill hose until I turn the engine off. Can you please tell me what my problem or problems may be? Thanks in advance

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Tuesday, December 18th, 2012 AT 10:35 PM

4 Replies

  • Tiny
  • rasmataz
  • Member

Replace the thermostat and then get asap so that we can continue to help-Possibilities here could be blocked heater core, heater control valve and airlock-Feel the heater hose are they both equally hot?

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Tuesday, December 18th, 2012 AT 11:11 PM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,409 posts

Feel both heater core hoses to see if both are hot. If they are, the heater core is flowing. Make sure the engine is running at a normal operating temp.

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Wednesday, December 19th, 2012 AT 12:58 AM
  • Tiny
  • ken cooper
  • Member

About your reply to check if the engine is running at a normal operating temp; according to my dash gauge it is. So what other thing may be making the radiator flush water back through the rubber over flow tube when it is hot? Thanks

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Wednesday, December 19th, 2012 AT 3:18 AM
  • Tiny
  • rasmataz
  • Member

Pressure test the cooling system to include the radiator cap-

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Wednesday, December 19th, 2012 AT 9:07 AM

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