If your ac compressor is not working, but the fan is running, someone might have unknowingly set the wrong temperature on the thermostat. In such cases, the room may be already cold enough, so the compressor is not required to operate.
Should outside fan run when AC is on?
The fan only runs when the system is on and not continuously. There is better dehumidification in your home during the summer months. When your fan is set to AUTO, moisture from cold cooling coils can drip and be drained outside. If your fan runs continuously, moisture does not have a chance to drip outside.
Why does my condenser fan stop running?
Lack of maintenance: This is probably the most common reason that causes condenser fan motors to overheat and shut off. Proper and regular lubrication of the fan motor is necessary for the motor to run smoothly. Periodically making sure that there’s no debris or dust in or around the fan motor is also a good idea.
Why is my AC compressor fan not working?
If the fan doesn’t start running, you may have a bad fan motor. If you have difficulty getting the blades to turn, there may be debris wrapped around the fan axle, or the motor bearings may be dirty or jammed.
Does a condenser fan always run when a compressor is on?
The fan runs whenever the compressor runs, and it draws cool room air through the front grille, and circulates it through the condenser coils, over the compressor, and back out the front grille into the room. The circulating air helps cool the compressor and the refrigerant in the condenser coils.
Why is my AC fan not spinning?
The air filter might be clogged, and you need to clean or change it. Another cause of an AC unit fan not spinning is a clogged air filter. If you can’t remember the last time you replaced the unit’s filter, it’s time for a replacement. This is an approachable solution for homeowners to tackle.
Will AC fan run if compressor is bad?
Inappropriate maintenance of the AC compressor sometimes can lead to its malfunctioning. An air conditioning unit can still appear to run with a malfunctioning HVAC compressor. AC unit is equipped with a pair of fans, which still can run even in case of a malfunctioned compressor.
Should condenser fan always run?
Condenser Dirt
The fan can pull in dust that, over time, will coat the condenser. The more dust and grime on the coils, the less efficiently the condenser can operate. The result is a condenser that must run almost constantly in order to keep the refrigerator cool.
When should the condenser fan come on?
The condenser fan (if it has a dedicated fan) or the radiator fan most always comes in (with AC on) when the compressor discharge pressure (or, alternatively, the liquid line one; look for where a sensor or a switch is located on the high pressure line) rises over an operative threshold.
How do you test a condenser fan?
Quote from the video:
Quote from Youtube video: Set your tester to continuity. Test for continuity across the two terminals. If there is continuity the board is good. Remember. This will only be true if the thermostat is calling for cooling.
How do I know if my condenser fan is bad?
5 Signs Your AC Fan Motor Is Bad
- The cooling fans won’t turn on.
- The fan turns on when the AC is running, but the blades rotate slowly.
- You can hear a rattling noise coming from the condenser unit.
- It smells like something’s burning.
- Blown fuse.
What controls the condenser cooling fan?
The condenser fan relay is the electronic relay that controls the power to the AC condenser cooling fan. When the relay is activated the AC condenser fan is switched on so that it can keep the AC condenser cool.
How do you test a fan on a compressor motor?
Signs and Symptoms of a Bad AC Fan Motor
- The fan won’t start even though the AC is on.
- The fan won’t stop, even when you shut the AC off.
- The fan turns on, yet the blades are rotating very slowly.
- There’s a rattling noise coming from the condenser unit when the fan is turned on.
Is the fan on an AC unit outside not spinning?
If you observe the AC condenser fan not spinning on your outdoor air conditioning unit, the problem is likely one of a few common things. If the compressor is working, but the fan won’t turn, then the problem is most likely with the motor and/or capacitor.
How do you reset an AC compressor?
How Do I Reset My Air Conditioning Unit?
- Shut it Off. First, turn off your AC before resetting the thermostat. …
- Get to the Circuit Breaker. So far, so good. …
- Wait 30 Seconds. After turning off the circuit breaker linked to the AC unit, wait for a full minute. …
- Turn it Back On.
Can a bad capacitor cause a compressor to overheat?
If the compressor is short-cycling, this also can cause overheating. The problem might be due to a dirty air filter or evaporator coil, or a faulty capacitor or metering device.
How do I know if my compressor is thermal overload?
Looking at the wiring schematic of a compressor, you will see there is a thermal overload in the common circuit. When the overload opens, you will not get continuity between the common terminal and the R or S terminals. During the process of checking continuity, the tech did notice the compressor to be hot.
What happens when a start capacitor goes bad?
A start capacitor is only used in the motor circuit for a second or two when it first starts to turn. Once the motor is up to speed, the start capacitor disconnects and is not used again until the next time the motor starts. If the start capacitor fails, then the motor will not be able to begin turning.
