A/C Cycling Switch

INSTALLED POSITION
On top of the accumulator/dehydrator.

FUNCTION
The A/C cycling switch has the following functions:
^ Protecting the evaporator against icing.
^ Protecting the air conditioning system against reduced pressure or an empty system.

A/C Cycling Switch:

OPERATION
The A/C cycling switch has the function of a de-icing switch and controls the on/off switch of the compressor clutch.

The pressure and the temperature inside the suction accumulator/drier and the evaporator are the same. If the pressure and therefore the temperature drops in the suction accumulator/drier, the temperature in the evaporator approaches freezing point. The evaporator threatens to ice up and lose its ability to cool. The low pressure switch then opens the compressor clutch when the pressure drops to a certain level and only closes it again when there is an appropriate rise in pressure.