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Faulty Temperature Gauge

posted by  Cyllene on  Fri Dec 23 14:52 CST 2022
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'79 244 DL. Temperature gauge has been faulty since I got the car. It rises as I would expect once the car starts warming up, but never stops. Once the car is up to operating temperature, it is at the top of the gauge. I'm like 99% sure this is not an accurate reading, since the car runs fine and has a new radiator, thermostat, fan and fan clutch due to an unrelated issue (old metal fan broke, fell off and damaged the radiator) I initially assumed it was the temperature sensor and since it was an inexpensive part, I replaced it. No change. I would not expect this behavior if it was a short in the wiring, so it stands to reason that the issue is in the gauge cluster. According to the previous owner, the owner before him replaced the instrument panel. This one has a bad odometer, the fuel gauge tends to read pretty high and the speedometer needle likes to bounce around. Not sure if any of that is related beyond the parts being old. Any tips on what I should look at for the temp gauge?






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