What happens if the condenser fan fails?

When the condenser overheats, all of the components of the AC system will begin to overheat until they eventually get hot enough to burn and emit an odor. A failed fan will not only fail to produce cold air, but can even result in damage to the AC system due to overheating.

What causes high head pressure r410a?

Once the air gets to the condenser, it will remain at its top and not condense. The subcooled liquid seal at the condenser’s bottom will prevent the air from passing out of the condenser. This air and water vapor will take up valuable condenser surface area and cause high-head pressures.

What safety switch activates when a condenser fan fails and the compressor keeps running?

The AC pressure switch is responsible for controlling the activation of the compressor to avoid its damage due to very high or very low pressure. The compressor receives a signal from the switch to stop running when the system has very low or very high pressure.

What causes a condenser fan to go bad?

There are several reasons the capacitor of your HVAC unit can fail. These include overheating, running too long, power surges, and age. When the capacitor fails, the condenser fan will no longer rotate.

How much does it cost to replace condenser fan motor?

The average cost of a condenser fan motor is between $300 and $500 (not including installation). If the compressor breaks, you are looking at a much costlier problem which could cost up to $2000. In some cases, your fan motor may be under warranty.

How long should a condenser fan motor last?

The average lifespan of an AC fan motor is about 12 years. An AC fan motor can last more than 12 years if it’s kept clean and cooled as needed.

What should the head pressure be on a 410A system?

A normally operating R-410A system with the same condensing temperature of 120 degrees and a 45 degree evaporator saturation temperature will have a high side pressure of 418 psig and a low side pressure of 130 psig.

Should condenser fan run all the time?

Yes, that is your condenser fan motor, it should be running at all times when your compressor is running. You’ll need a multimeter to see if your getting 120 volts to it. If your getting 120 volts to it and its not turning then its bad.

How long does a condenser fan motor last?

What should the temperature of a condenser fan be?

Most types of fan motors operate at a temperature of around 150 degrees Fahrenheit. Any issue with the condenser fan motor can lead to overheating and havoc to the entire HVAC system. However, with regular cleaning and maintenance, overheating on this component of your condenser unit is completely preventable.

What happens when a condenser fan is not working?

When the condenser fan cannot do its job, the pressure isn’t removed and the gas continues on through the system when it should be liquefied. This refrigerant is going to infiltrate the drier/accumulator and expansion valve or orifice tubes at higher pressures than it should.

How does air flow and static pressure affect a fan?

The relationship between air flow and static pressure of a fan is shown in the graph above. As you can see, air flow and static pressure have a negative correlation. When air flow increases, static pressure decreases; and when static pressure increases, air flow decreases. The 3 points depict possible scenarios where the fan will perform.

Is there a condenser motor in an air conditioner?

One of the major components of that process is the condenser. A major component of the condenser is a condenser fan motor. Furthermore, both air source heat pumps and air conditioners have a condenser fan motor. Is your Condenser Fan Motor Not Turning? For an air conditioner, the condenser fan motor is used to reject heat.

What happens to the fan motor in cold weather?

As the condenser pressure or liquid line temperature starts to fall, the fan motor will slow down. As the temperature or pressure begins to rise, the fan motor will speed up.

What happens when the head pressure goes up?

As the temperature or pressure begins to rise, the fan motor will speed up. By modulating the fan speed we can keep a more consistent head pressure, which gives better system low ambient performance while limiting wear and tear on the compressor and fan motor.

What should the temperature be on a Behler head fan?

The non-adjustable fan cycling controls are selected by the pressure settings required for the installation. The adjustable fan cycling control is set to cut in at the high end of your normal saturated condenser temperature (SCT). This may typically be between 120 and 130 degree SCT.

How does the condenser fan speed control work?

Instead of slamming the condenser fan off and on, the fan speed control will slow the fan down. The fan speed control utilizes a liquid line temperature sensor or a high-pressure transducer to control the fan speed. As the condenser pressure or liquid line temperature starts to fall, the fan motor will slow down.