Heater stopped blowing warm

Tiny
ZACHARY AUSTIN
  • MEMBER
  • 2003 OLDSMOBILE ALERO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 145,000 MILES
Okay, so few weeks ago heater stopped blowing warm only blows cold now. Some times the car will get to warm and push antifreeze out the overflow. Car has never gotten to more then little above the half line. Also, all the hoses connected to cooling and heating system get really hot. Help
Wednesday, February 14th, 2018 AT 7:45 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good morning.

Possible causes:

1. Thermostat stuck open.
2. Coolant level low.
3. Heater core clogged with debris.
4. Leaking head gasket allowing super heated coolant into the system.

Has the car overheated at any time?

Roy
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Thursday, February 15th, 2018 AT 1:28 AM

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