Is it bad if the fan motor is not running?
Keep in mind that just because the fan motor isn’t running, doesn’t mean it’s bad. If the power supply is fine and the windings are in good shape, check the capacitor next. The capacitor helps the fan motor run.
What is the fan motor in an AC unit?
What is an AC Fan Motor? The fan motor is a fairly uncomplicated yet vital part of an air conditioner. It’s the part of the unit that pumps air through the system. Without that circulation of air, your AC won’t cool your home.
How to test the fan motor on your air conditioner?
To test the fan motor on your air conditioner, you’ll have to do a continuity test. It might be best to call a professional for this, but if you have the know how we have many AC unit motors in stock as well. Step 1.
When to replace a fan motor or capacitor?
The reading should be within 10 percent of the rated capacitance on the capacitor. If the reading doesn’t match the rating, replace the capacitor. The fan motor is one of the most important components of your air conditioning system. Often referred to as the “heart” of HVAC equipment, fan motors work hard and under tough conditions for years.
Keep in mind that just because the fan motor isn’t running, doesn’t mean it’s bad. If the power supply is fine and the windings are in good shape, check the capacitor next. The capacitor helps the fan motor run.
How does a high speed cooling fan relay work?
During high speed operation the PCM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. After a 3 second delay, the PCM supplies a ground path for the high speed fan relay and the cooling fan s/p relay through the high speed cooling fan relay control circuit.
When to test a low or high speed fan?
Cooling fan motor testing (low and high speeds), relays, harness connectors…it’s all here. Generally, the low speed fan kicks on when the A/C is turned on or when the coolant temperature hits around 200 degrees F. High speed kicks on around 220F.
Why are my electric cooling fans not working?
Electric Cooling Fans Not Working: 2007 Silverado LT 4.8L New Body… 2007 Silverado LT 4.8L new body style. Electric Radiator fans do not come on when engine is hot nor after turning off, will only come on when AC is turned on. Engine runs correct temp while air flows through radiator at highway speed or when AC is turned on (thus fan is on).
How to troubleshoot an electric cooling fan problem?
1.Has the Cooling Fan Actually Failed? 1 If the fan comes on when the AC is running at MAX, but doesn’t run when the engine is hot, check the temperature sensor… 2 If the fan fails to come on, first check for a fan blown fuse or triggered breaker. On older vehicle models, you may… More
How can I tell if my AC fan motor is bad?
Check the power If you suspect the fan motor is bad, the first thing you should check is the power to the motor and the power to the air conditioning unit. Locate the circuit breaker and ensure it hasn’t tripped. If the power is fine, check to see if there is proper voltage.
Why do I have a GM 3 relay fan?
I try to show people how they can diagnose, fix and repair things themselves, grow their own food and preserve and store it. I strive to do something everyday to become more self sufficient; to be closer to my food, spend more time with my family.
Why does the radiator fan not run at highway speeds?
At highway speeds, when there’s sufficient airflow over the condenser and radiator, the switch stays open and the fan doesn’t run. When the vehicle slows or stops, the a/c pressure rises and the fan runs, regardless of engine temperature. In this arrangement the diode is not needed.