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Re: Volvo 850 heater blower
As you can read in the first response that is most likely the problem..as long as you're gonna be doing all the labor, if you can afford it replace both the resistor and motor at he same time if you plan on keeping the car.
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The speeds are controlled by a resistor pack. Changing the resistor pack may restore full functionality. Volvo heater fans are notorious for squealing. Usually they are run at a speed that doesn't squeal. If it squeals at one speed, sometimes a different speed won't squeal. The resistors seem to eventually fail. They are fairly cheap to replace.
Hi Steve, you're so close to the answer already.
The feed wire is broken and sometimes it touches and sometimes not. It might just be the fitting on the end if you're lucky.
I'd replace the whole wire just to be sure ;)