Question about 1993 Volvo 240

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Sticky thermostat ?? 1987 240DL Volvo. Every morning on the way to work after about a 5 minute warmup in the garage and a mile or so down the road the heat guage goes from midrange to way high (near max) and stays there about 30 seconds then goes back to midrange and is good for the rest of the 45 minute commute. Is this a sticky thermostat ?

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More likely a compensator board in the back of the temperature gauge.
You can find repair instructions on Brickboard RWD forum

Posted on Apr 08, 2011


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