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Re: blower motor for heater
Yes check out the resister but i would have to say that it will be the blower motor but make sure it is not the resistor because the blower motor swap in front is costly let me know what you have found and please give feed back
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Your van apparently has dual heat and air and it sounds as if your rear unit is working and your front is not. Will the front blow at any speed? or is it completely dead? If it will only operate on a medium setting you should have your blower resistor changed out, but if it does not operate at all, check for voltage at the blower motor plug in. If you have power but the motor is not running then have the blower motor changed.
If the front heater does not blow any air suspect a defective fan motor or resistor. You can try turning the blower on and banging the underside of the passenger dash to see if it begins working again. If it does, suspect a bad fan motor. If blowing only cold air, the most common problem is a low coolant level
There is a blower motor control processor for the back blower - it takes input from the front control and the rear control and decides the fan speed. That processor could be faulty, or the blower motor, or a 30amp fuse in the engine compartment. In the front system you have a controller and blend doors that direct air thru the heater core and evaporator. You would need to check the operation of those blend doors.
The blowers ion the back have there own blower motor. The front has it's own. The resister controls the range the blower motor runs on,( low, medium, high). If the blower motor is not working it may be the motor itself. Was the fuse checked:?
on the front blower make sure the fuse is ok if it is then check the relay if its good as well then youll ned to replace the blower motor. as far as the rear it sounds as if the air handler is not operating properly you need to locate it and ensure that nothing is blocking it from turning.hopes this helps you.