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Re: heater warms but air does not blow from vents
Your glove box should either have a few screws holding it in, or there will be a couple of plastic tabs on the inside onthe left and right of the glovebox that you can pull inwards to remove the glove compartment. Once this is out of your way, getting to and replacing the switch should be rather easy. Hioe this proves to be useful. Have a great evening!
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the blower relay switch controls the blower motor,this sounds more like an air blend switch on the heater control head on the dash,not making the switch over in that switch.it could be the air blend door motor on the heater duct under the dash on the passenger side.this can be checked with a scan tool that has the capability to communicate with the bcm computer on this car.
If you mean the blower doesn't work they may have unplugged the blower motor which is located behind the glove box with the plug pointing down I believe. The cover under the glovebox is also where the signal flasher is.
From you're description I'd say the blower moter has
cooked a bearing. Check fuse #1 and #2 both are 15amp. They're in the fuse block behind the coin tray
on the lower left side of the dash. They usually go first if the bl moter locks up. To do a quick test unplug the bl moter, located behind the right side of
the dash. Turn the fan switch off and replace the fuses. Plug the blower in and turn it on, if it pop's the
fuses again replace the blower moter. Hope this helps.
Start first with the simple ones which may likely be the cause of the problem and can be easily fixed. The heater is connected to the engine. Specifically, the engine coolant runs to tubings in the car and passes to the car's heater. Check the tubing if the connections are loose. Other than that you will have to check the vents under the dash if there is actual warm air coming into the system. IT may be blocked or it does not get to the outlet. Other than that this may need a specialist.
There is a control module that is located behind the glove box that needs to be replaced. cost is less than $100. Very simple to replace. Remove Glove box and swap out part. Phillips screwdriver needed.
I had this exact problem, it is probably your Blower Motor Resistor. It is located under/behind your glovebox, one screw holds it in. Not too expensive either. If that doesn't work it may be your blower motor. Good Luck!