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which thermostat temp to use ??? 200

posted by  Aye Roll on  Tue Jul 29 19:40 CST 2003
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last visit: Tue Oct 14 21:08 CST 2014
[RELATED]

You should use the standard 92°C thermostat. If your gauge is acting erratically, it's almost certain that it's due to poor connections in the instrument cluster. There is a "temperature compensation board" that's connected to the back of the instruments, which often creates faulty readings. Sometimes it's due to the 4-pin connector on it simply being dirty. Removing and reinstallign it sometimes cures the problem. Also, replacing the unit should cure it, if the board itself is faulty. The sensor on the engine is not often the problem. However, the wire for that sensor runs through the grey connector on your firewall, under the hood. I just recently had to repair a corroded wire for my temp gauge in my 87 240. That's common too on cars of this vintage: Volvo's wiring leaves something to be desired in it's old age.
--
Rob Bareiss, New London CT ::: '87 244DL/M47- 221K, 88 744GLE- 202K, 91 244 181K, 88 244GL 145K






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