What happens to the fan motor when ignition is turned off?

The fan motor won’t shut off when ignition is turned off The fan motor won't shut off when ignition is turned off – Answered by a verified Mercedes Mechanic We use cookies to give you the best possible experience on our website.

Why is my air handler fan not turning off?

Air Handler Blower FAN WON’T TURN OFF! 5 Reasons Why it Keeps Running! If playback doesn’t begin shortly, try restarting your device.

Why does the blower motor stay on even when the key is off?

When the regulator shorts out it will cause the blower motor to stay on even with the key off. You will need to have the regulator replaced and you may also need to have the blower motor replaced due to a parts modification. The system was updated to a different regulator which requires replacing the motor as well.

Why does my Mercedes E320 fan not shut off?

Mercedes-Benz E320 The fan motor wont shut off when ignition… The fan motor won’t shut… The fan motor won’t shut off when ignition is turned off Show More Show Less Ask Your Own Mercedes Question Share this conversation Answered in 2 minutes by: 10/14/2011 Mercedes Mechanic: Marty, Mercedes Technician replied 9 years ago

Why is my furnace blower not working?

One of the most common problems with furnace fans is a bad blower relay . The first thing to do is check the relay or voltage from the board. If no voltage is recorded, you will have to replace the board or the relay. If there is a battery, check if it is working properly. This is another common reason behind faulty blower fans.

Why is my AC blower not working?

A common problem behind an air conditioner blower not starting includes overheating, which keeps the motor from running. Let your air conditioner rest and cool down for a while before trying to turn it on again; if the motor works at that point, overheating is probably the problem.

Why would a car fan not blow?

Problems like a fan clogged with dirt, a dead motor, a loose fan belt or a stuck wheel can all cause your blower to not work properly. These problems can keep the blower fan from blowing enough air out of your vents to keep you cool.

How to check a fan motor for faults?

Check a fan motor for faults. Fan motor with the thermo-switch lead disconnected and test lead connected to the battery. Look at the fuse box for a blown fuse. If the fuses are intact, switch on the ignition and use a circuit tester to find if there is current at the motor terminals .

Why is my car fan not working properly?

Alternatively, connect the feed terminal on the motor direct to the battery positive terminal if the motor is fed via a thermo-switch. In either case, if there is a current at the motor, the motor is at fault. If the thermo-switch does not operate, the earthing point of the circuit may be faulty. Check that the earthing point is clean and tight.

Can a bad fan motor cause a breaker to blow?

CAUTION: If the fan fuse or fusible link is blown, or the breaker has been triggered, it is possible the fan motor itself may be bad and causing the fuses to blow. Replace the fuse or fusible link, or reset the breaker, and test the fan motor again. If the same problem appears and there’s no wire causing a short circuit, replace the fan motor.

What are the symptoms of a bad cooling fan motor?

Cooling fans do not come on The most common symptom of a faulty cooling fan motor are cooling fans that do not come on. If the cooling fan motors burn out or fail, the cooling fans will be disabled. The cooling fan motors work together with the cooling fan blades to pull air through the radiator.

What causes a fuse to blow on a cooling fan?

Blown fuse A blown cooling fan circuit fuse is another symptom of a potential problem with the cooling fan motors. If the motors fail or surge, they may cause the fuse to blow in order to protect the rest of the system from any sort of damage due to electrical surges. The fuse will have to be replaced to restore possible functionality to the fans.

What happens to the fan motor when ignition is turned off?