A/C Evaporator temp switch?

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racertjay
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Posts: 1
Joined: Wed Jun 12, 2019 4:54 pm
Location: Mississippi
Isuzu vehicle(s): 1991 Space cab 2.6

A/C Evaporator temp switch?

Postby racertjay » Wed Jun 12, 2019 6:18 pm

Hello guys, first time poster, long time lurker, been very helpful in fixing a couple problems in the past, (THANKS A LOT) but this one I can't seem to find much on.

My problem with my 1993 Isuzu SpaceCab 2.6L Manual. R134 from factory. Here recently my A/C compressor has been short cycling, and rapidly at times (gauges have normal psi , 30-35 low and 230-250 high, it's upper 80s in south MS). I jumped the pressure switch on the drier and saw same results, so it must be good. Next I moved to the Evaporator Temperature sensor. Is there a way to diagnose it? There are 3 wires in the plug. It is labeled + - L the part number on the side is ZEXEL 582550-5900 3.5 deg C. I can't seem to find the part either. Is there a way to test, bypass or jump the sensor to ensure it is good/bad? Or is there a relay i may be missing that could be causing the short cycling? Thanks for the help in advanced.

dorf
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Posts: 379
Joined: Sun Jul 17, 2011 1:03 pm
Location: N. Central Arkansas 81 LUV 4x4

Re: A/C Evaporator temp switch?

Postby dorf » Thu Jun 13, 2019 2:02 pm

Sounds like over serviced....or under serviced


Can you move the temp probe to another location in evaporator

Mine has a ...iinc. dec knob to adjust temp when compressor kicks in

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JoeIsuzu
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Posts: 20470
Joined: Thu Aug 19, 2004 9:11 am
Location: Germantown (next to Elvistown), TN
Isuzu vehicle(s): Original owner, '83 LS Diesel, 5-spd, 2wd, Long Bed, restoration in progress!

Re: A/C Evaporator temp switch?

Postby JoeIsuzu » Thu Jun 13, 2019 3:30 pm

TJ--
Are you in north MS? Hope you will get around to an intro soon.

Jack

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JoeIsuzu
Site Admin
Posts: 20470
Joined: Thu Aug 19, 2004 9:11 am
Location: Germantown (next to Elvistown), TN
Isuzu vehicle(s): Original owner, '83 LS Diesel, 5-spd, 2wd, Long Bed, restoration in progress!

Re: A/C Evaporator temp switch?

Postby JoeIsuzu » Thu Jun 13, 2019 11:43 pm