High pressure A/C switch to protect compressor
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Trailering
Joined: Oct 2007
Posts: 21
Likes: 1
From: 85375
High pressure A/C switch to protect compressor
There's go to be a logical explanation why the earlier units don't have a high pressure switch to protect the a/c compressor. Should be easy to add on the discharge side and in series with the low pressure switch. I blew the compressor seal due to overly clogged condenser. Anybody done this ?
Cargo Master
Joined: Oct 2012
Posts: 3,072
Likes: 48
From: California
I looked into this years ago when my system couldn't really keep up after the 134a conversion. My rear evaporator works great, but the front is lukewarm. I can't increase the pressure precisely due to what you're describing. Maybe with a high side switch, it would let me push the limit a little more, but never worked it out. I did find a company that made high-side switches that fitted to the 134a conversion valves if you wanted to go that route, but I think it was kinda pricey.
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Trailering
Joined: Oct 2007
Posts: 21
Likes: 1
From: 85375
Here's the easier part
1. 4 Seasons 36646 system mounted binary pressure switch
2. 4 Seasons wire harness connector 37219
Now, just need a tee on the discharge side between compress and evaporator...
1. 4 Seasons 36646 system mounted binary pressure switch
2. 4 Seasons wire harness connector 37219
Now, just need a tee on the discharge side between compress and evaporator...
Logistics Pro
Joined: Sep 2007
Posts: 3,739
Likes: 181
From: Western Mass
I upgraded my truck last year. Used parts from maybe a 94? New compressor, condensor, and lines etc... The new line from compressor to condensor had the T for the high pressure switch built in, so I just had to snip the wires and add in the pigtail and switch.
I ran into a small snag since I didn't reuse the evaporator and the line size was different at that connector, but was able to cut the old one and put in a flare connector that has been holding fine.
I ran into a small snag since I didn't reuse the evaporator and the line size was different at that connector, but was able to cut the old one and put in a flare connector that has been holding fine.
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colonelsanders2k7
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May 30, 2011 04:12 PM
