burtonsnowbird Posted February 27, 2007 Report Share Posted February 27, 2007 My 200 Volvo V70 R is over heating. If I turn my heat on full blast the temp comes back down. I have tried flushing the radiator, a new thrmostat, and a new radiator cap. Anybody have any other ideas? I am so frusterated! Link to comment Share on other sites More sharing options...
Guest 850T-5 Posted February 28, 2007 Report Share Posted February 28, 2007 Yes, if you replaced the coolant reservior cap, thermostat (make sure the breather hole is facing upward) and flushed the radiator, the only possibilities left are pretty much the Cooling Fan Relay and CTS (Coolant Temp Sensor). Both are inexpensive. The cooling fan relays fail all the time approaching or exceeding about 75K, OBD won't throw a code either if this fails unless just the low speed setting fails. They're like $79 at the dealer, important to replace anyway. Coolant Temp Sensor, like $39.00 from the dealer, tells the fan when to come on, this should be replaced preventatively as well. Be sure to replace these two items them report back and let us know. Link to comment Share on other sites More sharing options...
the underlørd Posted February 28, 2007 Report Share Posted February 28, 2007 ECT Sensor, P/N 9125463 Link to comment Share on other sites More sharing options...
burtonsnowbird Posted February 28, 2007 Author Report Share Posted February 28, 2007 I thought about the fan, but I've listened both after turning the car off and while driving. The fan is definately turning on and staying on. Could it be the water pump? Link to comment Share on other sites More sharing options...
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