roboffman

99 500SL
A/C codes
232 Refrigerant Pressure Sensor
233 Refrigerant Temperature Sensor

Control input and outputs through a/c controller

07 Refrigerant pressure bar = ope
08 Refrigerant temperature sensor °C = ope

Replaced pressure/temperature switch on filter drier
Filled to proper charge with A/C Machine
Cleared a/c codes with Snap-on scanner
Codes return and valves always show open at control head


2 of the wires at pressure switch have 5 volts and the third wire appears to be a ground

Bad HVAC Control head?
A bit at wits end

While resetting codes sometimes compressor clutch kicks on but immediately turns off.
Any help would be appreciated.
At least it is a convertible..... just to hot at times

dubs1383

On the receiver drier there are two sensors if I remember correctly? Replace them both.