1991 Buick Park Avenue temperature problem


Old 10-13-03, 02:56 PM
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1991 Buick Park Avenue temperature problem

First of all, thanks to the three that sent responses to my
last question.

I had the radiator checked and all was ok according to a
Radiator Tech. I believe he said he did a float test.

I removed the new failsafe 180 deg thermostat and replaced
it with one that was rated at 195 deg which was the same
degree as the old one I took out.

Now the car operates between 180 - 200 degrees while
driving. I let it set in the driveway today when I got
home and the temperature went to 220 degrees. At that
the 200 deg mark the fans came on and cooled it back down to 200 degrees before the shut off. I will assume this is normal and
will continue monitoring the tempature for the next couple
of weeks.

Why the temperature always stayed at around 140 deg
since I've owned the car (almost 4 years) is a mystery to

The computer controls when the fans come on and was
wondering if there is other information going to the
computer that would cause the fans to come on while
stopped in traffic regardless of the temperature?(rpm, speed odometer, etc)

Thanks again to those who replied...........
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Old 10-13-03, 03:03 PM
Join Date: Apr 2002
Location: Pittsburgh,Pa
Posts: 2,417
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Sounds like the fan is working properly now.The fan also comes on with a/c or defrost mode selected.
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