What does AC low pressure switch do?
The low pressure switch monitors the refrigeration system for a loss of refrigerant charge, and may also be helpful in stopping the evaporator (indoor) coil from freezing up due to a dirty filter or low airflow over the coil.
Can I bypass AC low pressure switch?
Under normal conditions the pressure switch doesn’t cycle the compressor. In your case, if your system is working properly, you should be able to bypass the switch temporarily until you can replace it.
Where is the low pressure AC switch located?
The low side service valve is located in the line that runs from the compressor through the evaporator (firewall) and up to the condensor on the low pressure (suction) side of the system.
What are the symptoms of a bad AC pressure switch?
Symptoms of a Bad or Failing AC Pressure Switch
- AC system cutting on and off rapidly. Repeatedly cycling on and off is part of the normal operation of an AC system.
- Unable to cool the car.
- Compressor not coming on.
How do I know if my AC pressure switch is bad?
Symptoms of a Bad or Failing AC Pressure Switch
- AC system cutting on and off rapidly. Repeatedly cycling on and off is part of the normal operation of an AC system.
- Unable to cool the car.
- Compressor not coming on.
How do I know if my AC low pressure switch is bad?
When they begin to fail they will usually display a few symptoms that will alert the driver of a potential problem.
- AC system cutting on and off rapidly. Repeatedly cycling on and off is part of the normal operation of an AC system.
- Unable to cool the car.
- Compressor not coming on.
How do I reset my AC pressure switch?
High-pressure switches are available with either an automatic or manual reset. An automatic reset will automatically restart the compressor when the pressure falls to a safe value. A manual-reset high-pressure switch needs to have an operator manually press a reset button in order to restart the compressor.
How much does it cost to replace an AC pressure switch?
On average, expect to pay between $20 to $100 on parts only. However, the cost gets much higher if you included the labor cost, especially if you are repairing it at a dealership, not at a local auto repair shop. The labor cost to replace an AC pressure switch can range from $30 up to $200 at some dealerships.