Quote:
Originally Posted by hatzie
I don't like the binary switches.
A 1996 and later R134a HPCO switch is what you want. Ask the outfit that sold you the hoses what the threads are... or measure them.
The stock 1984 LPCO shouldn't be a problem for R12 & R134a as long as you aren't going to run some exotic refrigerant like hydrocarbon blends that have very low liquid and vapor side pressures.
You don't really need a HPCO for R12... R134a has higher liquid pressures.
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Ill keep that in mind on the switches. Thank you.
I ordered a couple switches and received them yesterday.
The first one is a GPD 1711250 that threads into the accumulator and appears correct and looks similar to other ones Ive seen. Though the description on a few sites describes it as a clutch cycle switch. I found a Four Seasons 35751 after the fact and it looks the same but is described as a R12 pressure switch.
I also ordered a Four Seasons 35757 which threads onto the liquid line and appears mostly correct. My concern is it did not come with an oring. I found one that fits correct but the switch still bottoms out on the liquid line base without me having to use a wrench. I'm concerned the oring may not have gotten any "squish" and will/would leak.