AC Compressor Pressure Switch Bypass(ed?)

[benvfr]

Hey all. Had my ac repaired (a couple times now) and it's finally working great. I was starting to look at cleaning the engine bay and looking at what to cover up before washing and it looks like one of the ac mechanics has bypassed the compressor pressure switch by twisting together the plug wires. Is this something I can leave this way? Should I untwist the wires and see what happens?

1995 Silverado Z71

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[PlayingWithTBI]

Is this something I can leave this way? Should I untwist the wires and see what happens?

If you leave it bypassed, you won't have any over-pressure protection. If your system's pressure gets too high, especially on a hot day, you'll blow something up, like a hose or worse.

Try untwisting the wires and see what happens. If the AC stops working, you'll have to replace that switch, after you drain the system, hopefully you'll recover the refrigerant.

 

[benvfr]

Thanks, will try in the next couple days.......

 

[Orpedcrow]

Why don’t we have a face palm emoji? Jeeziz that’s an irresponsible “repair”.

I’d find a different mechanic. You can do a/c yourself but you’ll need some special tools to do it properly.

 

[PlayingWithTBI]

Jeeziz that’s an irresponsible “repair”.

Right? They shoulda at least soldered and shrink wrapped it

 

[benvfr]

I’d find a different mechanic.

I know....... and I did. I'm pretty sure it was the 1st guy I used, I just never noticed it.

 

[GoToGuy]

I guess on a hot day heavy throttle, see what gives up, the weak link. A hose, condenser, rupture seals out of compressor.
1. A repair business selling this type work?
2. No overpressure protection.
3. " Is this okay.....?"

 

[benvfr]

Ok. I finally got around to checking out what was what. I untwisted the pressure switch wires, taped them up and reattached the pressure switch plug. Started the truck and turned on the AC to NOT have the AC working. So, does that mean that I have a bad pressure switch and they just hotwired it so they wouldn't have to replace it? Jeez, I think its even included in a rebuild kit. Damn, gotta keep an eye on everything, these days.

 

[PlayingWithTBI]

So, does that mean that I have a bad pressure switch and they just hotwired it so they wouldn't have to replace it?

That pretty much proves it.

 

[benvfr]

Cool. Can I replace that part easily? Or does the system need to be emptied then charged up again? Looks like the sensor is a clip ring install, not sure if there was a Schrader valve like on the low pressure side.