Diyvehiclerepair
If you have a vehicle with climate control system and a variable speed blower motor and the blower motor won't shut off and stays on HIGH with the car turned off and the key out, chances are the blower motor motor control processor is toast or the HVAC control module is damaged.
- Why does my blower motor stay on when car is off?
- Why does my blower motor not shut off?
- Why is fan running when heat is off?
- What causes a fan to keep running?
- Why does my car heater not turn off?
- Why won't my heater turn off in my car?
- Why is my AC fan not turning off?
- How much does a fan limit switch cost?
- How do I reset my thermostat?
- Why does my car fan keep running after I turn it off?
- Which fuse is for the heater blower?
- Is there a fuse for the heater in my car?
Why does my blower motor stay on when car is off?
So car makers switched to pulse width modulation (PWM) to control the blower fan speeds. It's really a simple concept: the blower motor controller pulses either the power or the ground circuit on and off depending on which fan setting you choose.
Why does my blower motor not shut off?
If your furnace fan won't turn off, you most likely have one of these 3 problems: Your furnace fan limit switch is set to “manual override” The fan limit switch is faulty and needs to be replaced. There's a problem in your thermostat wiring.
Why is fan running when heat is off?
Over time, relay switches can become stuck or damaged, preventing the thermostat from communicating with the fan. Essentially, this means that the fan isn't receiving the commands you're relaying to the thermostat. So even if you turn your AC off, the fan will continue to run.
What causes a fan to keep running?
A too-small HVAC system will often run to keep up with the thermostat setting, leading the fan and blower to run consistently. ... This means that the entire system, including the fan, will run longer than usual to attain the set temperature.
Why does my car heater not turn off?
There are a couple potential reasons why your heating system won't turn off: Bad thermostat: A faulty thermostat can normally be repaired. Faulty wiring, a broken switch, or broken heating sensor can be fixed depending on how severe the issue is.
Why won't my heater turn off in my car?
A heater can stop working for a number of reasons, including: A low antifreeze/water level in the radiator due to a leak in the cooling system. A bad thermostat that isn't allowing the engine to properly warm up. A blower fan that isn't working properly.
Why is my AC fan not turning off?
The most common reason that your Air Conditioner fan won't turn off is because a stuck relay keeping the circuit closed. Double-check the thermostat and make sure the fan is not set to ON, and that it still runs when switching it to AUTO or OFF (if your thermostat has an OFF setting). ...
How much does a fan limit switch cost?
You will need to buy a high limit switch that is produced by the same manufacturer as your furnace unit. Depending on who your OEM is, this component could roughly cost you anywhere from $4 to $25.
How do I reset my thermostat?
Reset the Thermostat
The method to reset your thermostat will vary depending on the model. Common methods for resetting a thermostat include installing the battery backward for five seconds, pushing a recessed reset button with a pin or paper clip, or shutting off the breaker to the thermostat for 30 seconds.
Why does my car fan keep running after I turn it off?
It's normal for some vehicles to have a fan run for a few minutes after the car is shut off, generally to keep the engine cool. However, if the fan is running for an extended period, the fan itself can become damaged due to overuse. ... It's possible you may have a module or relay failing in your car.
Which fuse is for the heater blower?
Because of the volume of air that is moved by the blower fan, the motor may pull up to 20 amps or more at high speed. To protect the blower motor power circuit, a 20-, 25- or 30-amp fuse is usually located in the fuse panel under the dash.
Is there a fuse for the heater in my car?
Q: Is There a Fuse For The Heater In My Car? A: Your car's heater does indeed have a fuse. ... You'll need your car's dusty manual to find out where your fuse box is and which fuse is for the heater.
