Heater only blows heat about half the time

Tiny
ANONYMOUS
  • 2002 FORD EXPLORER
  • 230,000 MILES

Heater only blows heat about half the time. I've replaced the thermostat, heater control valve, the t by the heater control valve, radiator cap, can't see any visible leaks. It will often overheat for a second then you hear a gurgling sound and the temp drops way down. When I give it gas I can alsohear the gurgling, its coming from passenger side around the heater core/hoses/ reservoir tank. Any suggestions other then to take to a mechanic?

Thursday, January 24th, 2013 AT 9:11 PM

1 Reply

Tiny
ASEMASTER6371
  • EXPERT
  • 25,520 POSTS

It sounds like a bad thermostat but first make sure there is no air in the system. The overheating concerns me. It could be a blown head gasket

remove the radiator cap and start the motor, does any coolant come out the top of the radiator?

Roy

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Thursday, January 24th, 2013 AT 11:04 PM

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