The AC pump replacement continues apace. I'm moving the temperature/pressure sensor from the Harrison to the new pump, and it seems there's a part incompatibility. Can the old seat be moved to the new pump, or does the sensor need to be a different part?



Sensor<br/>





New seat





Old seat

 

Hmmmm.

I suspect you're running into the 'superheat switch' versus 'HSLP switch' dilemma.

The two are not interchangeable

I'm betting you are trying to put a superheat switch into the hole that was intended for an HSLP switch. The attached illustration might be useful

The 'seat' is the rear plate of the compressor. I wouldn't want to disassemble the compressor as it would surely void the warranty


Cheers
DD

 

If you need to replace one or the other....

Superheat switch is AC Delco # 15-2227
HSLP switch is 15-2224

I'm betting those are obsolete from Delco but the numbers can probably be cross referenced

Cheers
DD

 

Disregard those numbers!

Those numbers are for the compressors, not the switches

Sorry

Cheers
DD

 

Ahhh, phooey.

Okay: so the circuit with the thermolimiter switch (which I had) is not going to be compatible with the high pressure switch, then, right? If so: do we have a post on wiring that up somewhere in the forum?

 

The attachment in my earlier posting shows how to change wiring from superheat switch to HSLP switch.


Cheers
DD

 

OK! That modification I can do.