AC compressor clutch stays engaged?

Tiny
PROSPER DAVIDS
  • MEMBER
  • 1999 HONDA ACCORD
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 16,000 MILES
Hello guys, I have been working on my AC since last week. The problem is that my compressor clutch engages immediately I start my car even though I turn it off it stays on all the way. I have changed the climate control unit on my dash and the compressor clutch relay still no success. Now I have finally unplugged my compressor driving without AC. Please I really need need help.
Wednesday, August 22nd, 2018 AT 1:30 AM

11 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good morning.

If you remove the relay, will the compressor turn off?

Do you have a test light or voltmeter to do some checks?

Roy
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Wednesday, August 22nd, 2018 AT 4:24 AM
Tiny
PROSPER DAVIDS
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  • 27 POSTS
Yes, if I remove the relay the compressor goes off. Yes I do have a test meter.
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Wednesday, August 22nd, 2018 AT 1:57 PM
Tiny
ASEMASTER6371
  • MECHANIC
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Okay, hook the relay back up. Go under the hood and find one of the pressure switches on the AC lines. Disconnect it and see if the clutch releases.

Roy
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Wednesday, August 22nd, 2018 AT 2:24 PM
Tiny
PROSPER DAVIDS
  • MEMBER
  • 27 POSTS
I actually bought this car from a friend who has for long stop using the AC. Now I am trying to fix it up. I met the small AC line broken I welded the pipe together but I think something is missing which is the pressure switch. Cannot find any switch around the AC line, I only saw a wire I suspected is for the switch. Is there any other area where the switch could be? I do not know much about AC repair. Thanks
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Thursday, August 23rd, 2018 AT 1:50 AM
Tiny
ASEMASTER6371
  • MECHANIC
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Location.

Roy
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Thursday, August 23rd, 2018 AT 2:22 AM
Tiny
PROSPER DAVIDS
  • MEMBER
  • 27 POSTS
Hello Roy, thanks for all your support in troubleshooting my AC fault. I have been away for a couple of days, came back home today. I started the car and same thing AC clutch kick on. After several search for AC pressure switch, I found two wires close to the horn and dryer connected to each other I disconnect the wires and my AC compressor clutch released now my AC is no longer blowing cold. Could this be the wires for the P. Switch? With my DMM test, one of the wires tested 4 volt and the other a ground probably from the ECU. Please how do I get my AC back chilling?
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Sunday, August 26th, 2018 AT 4:03 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Can you attach a picture of what you see?

Roy
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Sunday, August 26th, 2018 AT 6:25 AM
Tiny
PROSPER DAVIDS
  • MEMBER
  • 27 POSTS
Those are the two wires they were connected to each other for what reason. I do not know I separated them and wrapped them with electrical tape to avoid any short circuit. If I connect them together, my AC clutch stays on.
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Sunday, August 26th, 2018 AT 8:49 AM
Tiny
ASEMASTER6371
  • MECHANIC
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There should be a pressure sensor there. They were jumped to get the AC to work. When you disconnected them, you disabled the compressor.

You will need to get the low pressure switch and a pigtail for the switch and then connect the wires to that.

Roy
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Sunday, August 26th, 2018 AT 3:31 PM
Tiny
PROSPER DAVIDS
  • MEMBER
  • 27 POSTS
Thanks a lot. I have left home for work to return by weekend I will get the pressure switch and the pigtail. Should I fix it on the dryer or along the pressure line? Thanks a lot I really do appreciate your prompt responses.
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Monday, August 27th, 2018 AT 12:29 AM
Tiny
ASEMASTER6371
  • MECHANIC
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The switch is on the line.

Roy
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Monday, August 27th, 2018 AT 1:50 AM

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