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Topic: Dash A/C low pressure switch P/N (Read 306 times) previous topic - next topic

Dash A/C low pressure switch P/N

Does anyone know the correct part number for the low pressure switch on the engine driven compressor for the dash A/C?  I am a 1998 U320 with the M11 engine.
Thanks
BJ Holden
'98 U320 36'
Motorcade #16754

Re: Dash A/C low pressure switch P/N

Reply #1 –
BJ, The low pressure switch has a valve stem core under the switch. So unscrewing the switch will not leak refrigerant.  The switch may have a pressure setting, probably around 10 psi, written on the switch. These are standard air conditioner switches, so they will be matched at an auto parts store.

And bypassing the switch by shorting the connections, may be acceptable as long as the system is cooling. The low pressure switch is probably in their to shut off compressor if refrigerant is lost. (High pressure switch is needed for normal operation)

Glad you guys found a loose wire on you dash air doors, and it appears that you do have the electric control system.