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Be certain to check your fuses, and also the ones that are under the hood.
Then, one of 3 likely events.
First, find a plug-in outside of the blower motor, and with key on and dash switch on, see if juice is getting to the blower motor.
If not, ether the relay or the blower is bad.
The most common problem is the relay, second most common in the motor, third is the dashboard switch.
God bless your efforts.
If you are talking about the blower fan resistor, this regulates the speed of the fan and can keep it off completely. You would go to the blower fan and backtrack the wires to a place on the Firewall where a part is held on by 2 bolts and has 1 wire from the blower fan on it.
There may be clearance problems with heater hoses and metal tubes in this area. The part is the size of a pack of cigarettes and is mostly hidden inside the duct structure. This is all under the hood work.
Look online for the blower motor resistor for your make and model. You may find a video.
It the blower motor is working and its just not blowing hot then you probably have a plugged heater core. Get under the hood and locate the two hoses that carry the coolant to the heater core. Pop them off on the engine end and see if you can flush it out. Use a hose or something and spray it into one of the hoses. If it is plugged up then you will need to disassemble the dash and replace. It's not terribly hard, but it is time consuming.
If blower not working, or only works on high- replace the blower motor resistor
the heater blower motor is located under the dash on the passengers side,there's a single plug with two wires that you have to disconnect then there is three bolts to remove and then remove the blower motor, sometimes there a plastic (or carpeted)cover you have to remove first under the dash to gain access to the blower motor .
If you are removing the main blower motor at the passenger side of the cabin then you don't have to remove the dash. It's behind the lower dash trim panel and takes about an hour and a half to two hours to do. Not to bad a job but you will need to be a bit flexible to see under there.
sounds like the front blower motor is bad on the passenger side under the dash. remove the panel under dash and you will see the blower motor housing and blower motor. check the plug in on the bottom of motor if it is plugged up and not working pull the motor out by removing the screws around motor and dropping out hook directly to battery and see if it works if it does it is a fuse or relay.
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