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Re: heater blower won't work
If it was working for a while on just one speed or two then it could just be the blower motor resistor part#
4864957 list at $45.05 at the dealer and less aftermarket. It is located on the passenger side behind the glove box in the blower motor housing. Hope this helps.
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Check to see if the blower works with the heater on. Turn the control to heat and see if the fan works. First check the fuse for the blower. If the fuse is good and the blower does not work with heat on , the blower may be bad or the speed resistor maybe bad.
The first thing to check is the level of coolant-is it full? Because no heat is the first indication of low coolant. When car is cool, open radiator cap and fill with a 50-50 mix of antifreeze and water. Also fill the overflow tank halfway up with the coolant mix.
Also feel both heater hoses after the car has come to normal operating temperature. Both should be hot. If they are, the heater is working as intended. If only one is hot, the coolant is not circulating through the heater, and someone will have to get that working-possibly an air block in the heater core, possibly a plugged heater core.
Finally, the blower motor may have wore out. Without the blower, very little heat will come out. Test or replace the blower motor.
I would start with the rear blower motor resistor, the resistor is what controls the speed of the fan, the resistor is located in the rear heater box near the blower, you will need to remove the right rear side panel to access the heater box. start with that
i`m guessing the blower motor is working.check coolant level then run car until hot,that is the upper rad hose is hot to the touch.then touch the heater hoses they should feel the same in temp from one to the other.if not then the heater core is plugged and will have to be flushed.you can clamp the hoses with something so you won`t loose very much coolant.then remove the hoses and using a garden hose run water one way then the other way.if this doesn`t work you can try and drain the heater core and fill it with clr and let it sit for a while(about 30 to 45 minutes)then flush the heater out with water.then hook up the heater hoses and run until hot,if it works then you will have heat and unplugged the heater.if both hoses are the same temp then replace the thermostat.
If it won't produce heat then you have an issue with your heater core. The heater core could be bypassed, in which case no hot coolant will get to it to produce heat inside the cabin. The heater core could be stopped up with dirt/debris, in which case the heater core can't radiate heat to produce heat in the cabin. The ducting in the dash could not be allowing the hot air to flow to the vents - therefore no heat in the cabin. I'd start with the heater core and check to see if it is bypassed. This generally happens on older vehicles because the parts can be harder to find.