My heater will not blow heat even through the.

Tiny
KEN COOPER
  • MEMBER
  • 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
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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