Nothing.

If you short the terminals on the pressure switch the system would turn on *if* 
the charge or pressure was low. Otherwise, disconnecting it would have no 
effect.

I guess a pressure switch could fail grounded, but I've never heard of that 
happening.

Dan

Sent from my iPad

> On Jul 17, 2015, at 1:21 PM, WILTON via Mercedes <mercedes@okiebenz.com> 
> wrote:
> 
> What would unplugging the wire on the pressure switch on the dryer isolate?
> 
> BTW, 'replaced KLIMA coupla years ago.
> 
> Wilton
> 
> ----- Original Message ----- From: "Max Dillon via Mercedes" 
> <mercedes@okiebenz.com>
> To: "Mercedes Discussion List" <mercedes@okiebenz.com>
> Cc: "Max Dillon" <dillonm...@gmail.com>
> Sent: Friday, July 17, 2015 11:45 AM
> Subject: Re: [MBZ] Blown fuse
> 
> 
>> Wilton,
>> 
>> I know that pulling the KLIMA relay will disable the AC compressor, that is 
>> located right behind the battery and fairly easy to get to, but may be 
>> pretty tight in the socket.  A firm grip and gentle working while pulling up 
>> should free it.  I don't know if a failing push-button unit would still blow 
>> the fuse if the KLIMA relay were removed.
>> 
>> Pulling the plug on the top of the compressor would definitely isolate it, 
>> but that would also remove the compressor speed signal, which means the 
>> KLIMA relay would interrupt the power to the compressor clutch.
>> 
>> A common cause of trouble in the AC compressor controls is a failing clutch 
>> that draws too much current.  I'll have to search for a bit to find the 
>> normal amperage.  I'd measure that current next if I were you, or is the 
>> test a resistance test?  Need to start digging...
>> -- 
>> Max Dillon
>> Charleston SC
>> '87 300TD
>> '95 E300
>> 
>>> On July 17, 2015 11:22:19 AM EDT, WILTON via Mercedes 
>>> <mercedes@okiebenz.com> wrote:
>>> Fan turns freely.
>>> 

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