1991 Plymouth Acclaim Temperature goes up and down

1991 PLYMOUTH ACCLAIM
50,000 MILES • 4 CYL • 2WD • AUTOMATIC
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TMURF422
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  • 1 POST
I have a 1991 Plymouth Acclaim. The temperature gauge goes almost all the way to "H" and then goes back down to "C", then it will settle in the middle for about 5 to 10 minutes and then go back up to "H" and then right before it hits "H" it goes back down "C" then comes up a little. this continues to go on as I drive the car. I changed the thermostat and it still does it. This use to never happen.
Nov 8, 2008 at 8:32 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,992 POSTS
Check the coolant temperature switch and the coolant temperature sensor-see below


https://images.2carpros.com/forum/automotive_pictures/12900_cts_19.jpg

Nov 8, 2008 at 8:54 AM
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