Table of Contents
What is the purpose of AC pressure switch?
The AC pressure switch is a safety switch mounted on the upper and lower sides of the air conditioning system. When the pressure goes up too high or falls too low (on the side of the system where the sensor is mounted), the switch turns off the compressor to avoid damage.
What is the purpose of a low and high pressure switch in an AC system?
A high pressure switch (HPS) and a low pressure switch (LPS) are protective devices for the compressor and refrigeration circuit. The high pressure switch monitors the system for an inoperative outdoor motor, and/or a dirty/restricted condenser (outdoor) coil.
Can you bypass AC high pressure switch?
To simply answer this question, yes you can bypass the AC high pressure switches. There are possible issues that may arise after bypassing the AC high pressure switch which may be caused by a poor performing condenser fan motor.
How do you know if your AC pressure switch is bad?
If you noticed that the AC system is not running, not blowing cold air, compressor not running, or the AC system is turning on and off very frequently, then this is a sign that you need to replace the AC pressure switch.
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 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 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.
How do you know if a pressure switch is bad?
Here are some tell-tale signs that your pressure switch is beginning to fail: Your water pressure is at or above the cut-out pressure, yet the pump doesn’t turn off. Your pump doesn’t turn on at the proper cut-in pressure. You have low water pressure even though the pump is running.
How do you reset an AC high pressure switch?
What would cause a high pressure fault?
The most common cause of a refrigerant high-pressure switch tripping in the wintertime is lack of airflow across the indoor coil. One of the signs of lack of airflow is a high temperature split across the indoor coil. Inspect the filter, not just if it is dirty but restrictive.