2002 Other Oldsmobile Models heater blowing cold and overhea

Tiny
SRQ1022
  • MEMBER
  • 2002 OLDSMOBILE
  • V8
  • FWD
  • AUTOMATIC
  • 92,000 MILES
I have a 02 Olsmobile Silohette and recently the heater started blowing only luke warm to cold air and my temp gauge is going all over the place and overheats if the car isn't moving. The heater blows luke warm when the temp gauge shows ablut 1/4 and then blows cold when it gets up to 1/2. We replaced the thermastat and it is still having the problem. Can you help please.
Friday, January 25th, 2008 AT 1:06 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Did you check the heater core could be partially clogged-also bleeding the cooling system. Might also be a heater control valve/air mix and blend/mode door/actuators and vacuum/hose problem.

Water pump failing or Fan clutch or fan not functioning right
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Friday, January 25th, 2008 AT 1:14 AM

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