I have check fuse (good) ,Swap out the fan relay with another (No change).Q? can it be a defective ECT sensor.Can this cause the fan not to switch ?
Volvo Q&AAsk Your Question
1995 Volvo 850 Question: Hey guy ! My 850 coolant fan just refuse switch on when the reach working temp.
Answer #1Bret Bodas from RepairPal Test Shop, January 10, 2013, 09:44Master
You will need to diagnose this properly by checking to see if you are getting power to the fan when the engine is warmed up. I do not suggest replacing any more parts until you do this. You can do this with a test light or a voltmeter.
If you are not familiar with how to perform an electrical diagnosis of a circuit, then I suggest taking it to a shop.
Answer #2Greg's Orange Auto (13211 Answers) , Orange, CA - (714) 361-9386globalhelper January 10, 2013, 13:00Master
SEEK DAIG AND EST AS TO SAVE TIME AND MONEY. IT COULD BE FAN ,CIRUIT OR OTHER ISSUES