If your air conditioner is running but your home is still warm, the system may have a problem with one of its electrical components. Many homeowners experience an AC system that turns on but does not cool properly.
In many cases, the issue is not the entire system but a small part such as a capacitor, contactor, or condenser fan motor.
At Dallas HVAC Parts in Garland, we help homeowners and HVAC technicians identify the correct replacement parts so the system can be repaired quickly.
Common Reasons an AC Is Not Cooling:
Several problems can cause an air conditioner to stop cooling properly:
1. Bad AC Capacitor
One of the most common causes of an AC unit not cooling is a failed capacitor.
The capacitor helps start and run the compressor and fan motor. When it fails, the system may run but the compressor may not start correctly.
Signs of a bad capacitor include:
• AC unit humming
• AC unit turning on but not cooling
• Outdoor fan not spinning
• AC shutting off quickly
Learn more on our Capacitor page.
2. Faulty Contactor
The contactor is an electrical switch that allows power to reach the compressor and fan motor.
If the contactor becomes worn or burned, the AC unit may not start properly.
Symptoms of a bad contactor include:
• Clicking sound from outdoor unit
• AC unit not turning on
• AC starting and stopping repeatedly.
Learn more on our Contactor page.
3. Condenser Fan Motor Not Running
If the outdoor fan motor is not running, the air conditioner cannot remove heat from the system.
This can cause the system to run but not cool.
Common signs include:
• Outdoor fan not spinning
• AC unit overheating
• AC blowing warm air
Learn more on our Motor page.
Bring Your Part for Help
Before replacing expensive equipment, bring your old part or the model number from your AC unit to Dallas HVAC Parts in Garland, Texas.
Our team can help you match the correct capacitor, contactor, or motor so your air conditioner can get back to cooling properly.