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Search Auto Parts Search 1975 olds cutlass 5.7 A/C compressor wire on back of compressor Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> AC Auto Repair Help Forum BigBoat12! New User Jul 20, 2023, 12:22 PM Post #1 of 5 (1392 views) 1975 olds cutlass 5.7 A/C compressor wire on back of compressor Sign In I have purchased a reman Murray #57092 compressor and on the back of my old compressor there is a wire connected, the new compressor does not have the provisions for a wire. it appears that i could remove a snap ring and swap the cartridge but am hesitant to disturb the new compressor. Is that wire necessary? it connects to one of the two wires that go to the front of the compressor. Hammer Time Ultimate Carjunky / Moderator Jul 20, 2023, 12:44 PM Post #2 of 5 (1389 views) Re: 1975 olds cutlass 5.7 A/C compressor wire on back of compressor Sign In That is a pressure switch that needs to be transferred to the new compressor. Further warning, if this car had a compressor failure you may ruin the new compressor if you don't make sure the debris from the compressor didn't land in other components. You also need to adjust the oil level in the compressor to account for what is being done. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. Tom Greenleaf Ultimate Carjunky / Moderator Jul 20, 2023, 1:27 PM Post #3 of 5 (1381 views) Re: 1975 olds cutlass 5.7 A/C compressor wire on back of compressor Sign In Right it's a "temp" switch you don't get a new one as HT said. Swap it or it won't kick on. Easy on snap right that other is just a plug for IDK something that didn't use the thermal switch. It hot or pressure (?) would trip it. Do not screw up hole it goes into or "O'' ring! Plain bubble check that with any pressure in system a good idea, Tom (This post was edited by Tom Greenleaf on Jul 20, 2023, 1:29 PM) Hammer Time Ultimate Carjunky / Moderator Jul 20, 2023, 1:50 PM Post #4 of 5 (1369 views) Re: 1975 olds cutlass 5.7 A/C compressor wire on back of compressor Sign In That's definitely a pressure switch but let me add one more thing. The failure rate on these reman compressors is about 60%, especially if you don't replace the condenser. I will not use one no matter what the cost. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. Tom Greenleaf Ultimate Carjunky / Moderator Jul 20, 2023, 2:30 PM Post #5 of 5 (1361 views) Re: 1975 olds cutlass 5.7 A/C compressor wire on back of compressor Sign In True! Does OP know if the OE condenser is still used in this? 1975 could take a shotgun and not leak! It wasn't HE unless changed out then it would be now? 152a set to replace R-12 or IDK on something this old have to look and see it this far back, Tom   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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