High pressure switch?


bmtrnavsky

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95
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My compressor is new but not shutting off. I think I need to replace the high pressure switch. I’ve located it... do I need to evacuate system to replace this or does it have a valve? This is on a 95 ranger 2.3
 


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Loganwildman

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Not sure on the 95's, but I just spent the evening tracing the A/C wiring on my 94 and power goes from the ac switch on the heat/ac control panel to the low pressure switch, then out to the high pressure switch and into the PCM. So if the 95 is like my 94, it could be the high or low side switch.
 

Josh B

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I believe the 94 to 95 saw a number of changes
 

RonD

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As far as I known automotive AC pressure switches can be changed without releasing pressure in the system
 

wildbill23c

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You should be able to replace the switch without evacuating the system, that is if the valve isn't stuck partially or fully open once the switch is removed. Yes, in a properly working system you can replace the switch without evacuating the system, just keep in mind if the valve isn't any good it'll empty the system out for you wear protective gear just to be safe.
 


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