AC compressor not turning on

Tiny
LILLE
  • MEMBER
  • 2002 HONDA CIVIC
  • 1.7L
  • 4 CYL
  • 2,000 MILES
Have a problem with my AC. I have checked everything from the relays to the compressor all seems to work. Fans all seem to work, but when I turn on the AC does not turn on the compressor. I replace the fuse box under the dash, checked all the relays replace the heater control thing and AC button return the AC on rear defroster. Still getting nothing. Looking for ideas what to try next.
Thursday, August 9th, 2018 AT 8:54 AM

9 Replies

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

You need to check for voltage to the compressor first to see if it is getting voltage.

If it is, it may be a compressor clutch failure.

If it does not then need to start with verifying voltage from the fuses to the relay.

Check the two fuses listed in the diagram for power. If there is, then go to the relay and verify power to the relay with the key on. There should be two terminals that have voltage.

Roy
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Thursday, August 9th, 2018 AT 10:53 AM
Tiny
LILLE
  • MEMBER
  • 5 POSTS
I have tested the relays and did a jumper wire and the clutch comes on. He hold it there it will start cooling I just cannot get it to turn on when I turn the AC button on on the inside of the car.
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Friday, August 10th, 2018 AT 8:01 AM
Tiny
LILLE
  • MEMBER
  • 5 POSTS
I have tested all fans come on.
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Friday, August 10th, 2018 AT 8:02 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
No, you missed my point completely.

I did not say to jump anything. I said to check for power to the relay to be sure there is power. You need a test light or voltmeter to check these voltages.

Please re check and let me know.

Roy
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Friday, August 10th, 2018 AT 2:05 PM
Tiny
LILLE
  • MEMBER
  • 5 POSTS
Where would you start checking for that at? I am a pretty new mechanic just trying to figure this out. Appreciate your help.
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Saturday, August 11th, 2018 AT 7:38 AM
Tiny
LILLE
  • MEMBER
  • 5 POSTS
I took the relays out checked for power. There is power on each one then you turn the key on and then another tablet power on each one.
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Saturday, August 11th, 2018 AT 1:22 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Which relay did you remove and test?

Can you post a picture of what you see?

Roy
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Saturday, August 11th, 2018 AT 4:42 PM
Tiny
NICK ONYSHCHUK
  • MEMBER
  • 4 POSTS
I know this post was a year ago. Hope somebody will answer me thou. I have the same problem. There is power on each relay but when I turn the AC button on - nothing work.
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Wednesday, August 21st, 2019 AT 3:27 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
You are more than welcome to start a new question and I will be glad to help you.

For your convenience here is the link:

https://www.2carpros.com/questions/new

Make sure you are logged into the site before clicking on the link.

Roy
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Wednesday, August 21st, 2019 AT 11:57 AM

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