Table of Contents
Where is the blower motor control module?
It’s located inside the dash, often on the opposite side of the steering wheel or inside the engine compartment on the firewall. A blower motor resistor or a blower motor control module is the part that controls the speed of the blower motor.
Why does the blower motor stopped working?
In a situation where the motor doesn’t work on any speed, the most likely causes are: a blown power supply fuse, a bad motor ground connection, bad motor speed control module or a failed motor. On all systems, a failed blower motor is least likely. Start by checking the blower fuse and HVAC controller fuse.
What are the symptoms of a bad climate control module?
Symptoms of a Bad or Failing AC Control Module
- Inconsistent cooling. Because the AC control module controls and regulates all of the functions of the system, you may begin to notice cooling inconsistencies when there is a problem.
- Out-of-date software updates.
- Uneven air distribution.
How do I know if my heater fuse is blown?
You may also need to use your multimeter to check if your fuses are blown. You can quickly determine by checking resistance with a multimeter. A good fuse will have nearly zero ohms of resistance, if the fuse is blown there will be no reading. Once you know how to check your furnace fuse, you can replace it easily.
Where is the fuse for the heater blower motor located?
Many vehicles have two fuses for the blower motor, one in the interior fuse block and the other under the hood. The blower motor is usually under the dashboard on the passenger side.
What should I do if my heater relay is not working?
Turn on the key and try the blower. Some relays may not activate until the car is running and have a built in delay so you may need to start the engine and wait a few seconds to see if your repair was successful. Depending on what you drive, this job could be a breeze or a nightmare.
What to do if your car heater switch is wrong?
Put on your safety glasses and disconnect the battery at the negative cable. If the system is live, a metal tool in the wrong place can cause arcing and possible damage to your car’s electrical system.
When to replace a heater blower motor switch or relay?
When the motor gets old and tired it will draw more current through the wires than a new motor. It may still draw enough current to blow the fuse after it runs for a while. In that case, a motor replacement is in order. Step 1: Disconnect the battery. Put on your safety glasses and disconnect the battery at the negative cable.
What should I do if my heater fan switch is not working?
As long as there are no bare wires exposed, reconnect the battery cable and try running the heater fan to see if there is other diagnostic work to be done. If everything checks out, disconnect the battery again, route the switch back through the hole, and attach it with the nut.