How do you fix a car heater that has blown?
Disconnect the battery and the wires connected to the motor, making a note of how they fit . Attach one side of the tester to the motor earth wire and probe each of the feed terminals in turn. If the tester lights on all the terminals, the motor is sound. But if the tester fails to light the motor has blown and will need replacing.
Where is the heater motor located in a car?
The motor is usually earthed to the body by a separate wire. In most cars the heater motor is situated under the centre of the dash, which makes it rather inaccessible. In some cases, however, the motor is under the bonnet at the rear of the bulkhead.
Where is the heat exchanger located in a car?
The “heater core” is a heat exchanger much like a radiator. It is mounted inside the heater housing inside your car’s dash. The blower motor pulls air through the heater core, removing heat from the antifreeze circulating through it.
How does a car heater turn on and off?
Current is fed to the motor via a switch on the dash. If your fan has several speeds, they are usually controlled by a large resistor block mounted piggy-back on the fan motor. For slow speeds the dash switch directs the current to the motor via the resistor block.
Where does the heater blower motor go in a car?
Share it! The heater blower motor is a part of your heating and air conditioning system. It’s a fan that pushes air through either the hot heater core, or the cold air conditioning condenser, and then into the car’s interior, through the appropriate vents.
What causes a heater motor to be damaged?
Heater blower motors can be damaged by fluid leaking from a heater core or evaporator. Any fluid leaks near the heater blower need to be resolved or the new heater blower will be ruined.
What should I do when my car heater core is removed?
Turn the heat onto full blast so that coolant starts flowing into the heater core. After the engine has been run for a little bit and there is warm air coming out of the vents, check the hoses for any leaks since we just removed and replaced them. With the heater core cleaned out, the car should warm up nice and quickly now.
What are the symptoms of a bad heater blower motor?
Little or no airflow through the vents, defroster does not clear glass well: This is a key symptom of a bad heater blower motor. If the motor is worn out or damaged, it will be unable to generate the airflow necessary for the heating and air conditioning to work properly.