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What are the symptoms of a bad blower motor relay?
Symptoms of a bad heater blower motor resistor
- Fan does not work at all, so no air comes out of the vents.
- Fan only works on some speeds and not others.
- Fan only works on the highest speed.
- Fan runs all the time and can’t be controlled with the fan switch.
- You see smoke coming out of the vents.
What is a front blower relay?
In a blower motor, the relay supplies the power that allows the fans to circulate warmed air. Essentially an on/off switch, the blower motor relay’s reactions start and end the heating process in HVAC systems by controlling the flow of current between the power source and the motor.
What relay controls the blower motor?
The blower motor relay controls the current used to power the blower motor, and is subject to the constant on and off switching.
What does the blower motor relay do?
How do you test a blower motor relay fuse?
Turn the ignition key to the on position (engine off), and remove the relay. Using the probe, test all terminal sockets in the relay connector. Two of the four should have power. If power exits only at one terminal or no power exists, recheck related system fuses.
How do you remove a blower relay?
How to Change the Blower Motor Relay
- Locate your vehicle’s blower motor relay.
- Open the glove box and empty its contents.
- Locate the two tabs on each side of the open glove box and push them in.
- Remove the relay motor’s door panel by removing the two screws that hold it in place with a screwdriver.
Blower motor does not function One of the first symptoms of a problem with the blower motor relay is a blower motor that does not function at all.
Why is my car heater not blowing warm air?
A heater core is responsible for a vehicle’s defrosting and heating actions. Heater cores are typically situated directly in the back of dashboards. If your car is not blowing warm air into the cabin and the coolant level is fine, then you could have an issue with your heater core.
What to do if your blower motor wont start?
You can test by testing with a voltmeter set to “Volt AC” between the high-speed blower wire (usually black) and the white neutral wire. If you are getting 120 volts to the motor and it is not starting then you have a blower motor problem and either need another new blower motor or a new blower motor run capacitor.
Why does my blower fan not come on?
I have heard some people say that if you have a Honeywell Smart Valve, gas valve installed and it is defective then this can cause blower motor issues where the blower will not start.