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1999 Silhouette minivan heater

Tiny
TRINAWILES
  • MEMBER
  • 1999 OLDSMOBILE
The heater will not blow hot air. I had the thermostat replaced at the end of last winter, which seemed to fix the problem, but now it is cold again and the heater is not working properly. What do you think the problem could be? The car has over 175,000 miles on it.
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Monday, November 26th, 2007 AT 6:17 PM

1 Reply

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
For starters the coolant has to be full. Feel the heater hoses going into the heater core, are they hot? Or is the one coming out cold?

Has any additives for leak stop been added?

Don't overlook a theremostat that went bad, regardless if it is fairly new.
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Monday, November 26th, 2007 AT 6:20 PM

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