How does the low pressure switch on an AC work?
It monitors the pressure of the refrigerant on both sides of the system. There is a separate switch for the high side and the low side. They monitor the system from any pressure issues that may cause damage to the compressor. When the pressure of the system goes below 25 psi, they shut off the system momentarily.
Where are the low and high pressure switches on a car?
The low-pressure side switch is found before the AC compressor, while the high-pressure switch comes after the compressor. Most AC pressure switches are found within the engine compartment, but some manufacturers put them elsewhere.
What are the symptoms of a bad or failing AC pressure switch?
You could also see this symptom manifesting as an AC system that just feels really weak. For example if you have started cracking the AC to Max and are still just getting a little trickle of cool air, that is definitely pointing to a failing AC Pressure Switch as the cause. The next symptom is also somewhat connected to the one we discussed above.
Where is the low pressure AC sensor located?
On the other hand, the low-pressure AC pressure switch can be located by following the small pipes under the hood. If you are looking to replace the high-pressure sensor, it is usually located under the condenser and be prepared to remove some parts before reaching the switch.
What is the purpose of an AC low pressure switch?
An AC low-pressure switch is to measure the pressure faults in the system and to identify them timely because if the pressure faults are not timely corrected, it may lead to causing damage to the compressor.
What does an AC low pressure switch do?
Essentially, these switches are used to sense the refrigerant operating pressures of the air conditioning system. The low pressure switch monitors the refrigerant pressure on the suction side of the system. The low pressure switch turns off voltage to the compressor clutch coil when the pressure drops to a level that may damage the compressor.
What are the symptoms of a bad AC pressure switch?
The most common symptom of a bad AC pressure switch is most likely that you will notice that the AC compressor is cutting on and off rapidly when you are idling your car.
Where is the AC low pressure switch located?
The low pressure switch is located on the air conditioning line in the right rear of the engine compartment near the firewall. The low-pressure switch in your air conditioning system is used to interrupt power to the compressor when the low side pressure drops below 25 psi. This prevents freeze-up of the system and possible damage to the compressor.