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1995 Pontiac Grand Am eratic heat and overheating

Tiny
MSENG0809
  • MEMBER
  • 1995 PONTIAC GRAND AM
Heater problem
1995 Pontiac Grand Am 6 cyl Front Wheel Drive Automatic 113k miles

Driving home, the heat blew cold and the water temp rose to red, I turned on the defroster and the heat blew warm again and the water temp dropped. After about 5 to 10 minutes, the defroster went cold and the temp rose, I turned it on the heater and temps dropped as the heater blew hot air. This cycled back and forth for about 30 minutes of city driving. Then it was fine - drove another 30 minutes with no problems.
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Thursday, January 3rd, 2008 AT 6:04 PM

2 Replies

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Think it may be time for a radiator/heater core flush and a new thermostat.
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Thursday, January 3rd, 2008 AT 7:33 PM
Tiny
DWAYNE GELEN
  • MEMBER
  • 7 POSTS
If flushing system don't help make sure fluid levels are not low.
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Thursday, January 10th, 2008 AT 2:00 PM

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