What does the low side pressure switch do?

What does the low side 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.

What is low pressure switch in AC?

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.

Are low pressure switches normally open or closed?


Where is the clutch cycling switch on a compressor?

The clutch cycling switch is a type of device called a transducer, which changes internal resistance in response to changes in pressure. The clutch cycling switch measures the low side A/C pressure near the evaporator outlet and is often mounted on the accumulator. Step 1: Locate the compressor clutch cycling switch.

Why does the a / C compressor clutch not engage even?

The a/c compressor clutch will not engage even when I jump the low pressure switch thats mounted on the top of the accumulator (dryer). Is there another method such as direct from the battery? There are two wires goin into the compressor instead of one so I am unsure of how.

Where is the low side high side low pressure switch?

The switch is located near the expansion valve. Use an Ohmmeter to find if it is giving the correct reading. Also, check if the compressor clutch engages and rotates the compressor when the AC is on. Similarly, the fan also has to spin when you turn the system on.

Why do you need an AC clutch cycling switch?

An AC clutch cycling switch meters low side AC pressure. This switch helps the AC system maintain proper cabin and evaporator temperatures. The A/C compressor clutch must be cycled on and off to prevent the evaporator from icing up, as well as to to prevent compressor damage.

Posted In Q&A