How do I test my AC low pressure switch?
Attach a low-pressure gauge from a refrigerant recharge kit to the low-pressure fitting which is located between the accumulator and the compressor, marked with a capital “L”. Now, check the pressure of the air conditioning system. The low-pressure gauge should measure 56 psi or higher.
Where is the AC low pressure 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.
How do I reset my AC pressure switch?
Locate the high pressure switch near the compressor (a cylindrical device piped into the refrigeration system with two wires a red button on the top). Push in the button to reset. Push the rocker switch to restart the unit. The thermostat will be flashing temperature with the !
How do I know if my AC switch is bad?
Bad AC Pressure Switch Symptoms
- Intermittent Air Conditioning.
- Air Conditioning Stops Working.
- Warm Air is Blowing.
- Strange Air Conditioning System Noises.
- Turn On Air Conditioning.
- Feel the Condenser Tubes.
- Check AC Pressures.
- Scan for Trouble Codes.
How does a low pressure AC switch work?
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 does the low pressure AC switch do?
Your car’s air conditioning system has two switches that protect the compressor and the refrigeration circuit. The low pressure switch turns the system off when the pressure is too low to prevent damage to the compressor. Like all parts of your vehicle it has a limited lifespan.