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After replacing the A/C system the clutch does not turn on?

Tiny
ROBBINS
  • MEMBER
  • 2008 HONDA ACCORD
  • V6
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Had to put a new A/C system on the car. The old compressor had metal shavings, so I replaced the compressor expansion valve, pressure switch and lines and condenser. Now the clutch won't kick in, can't seem to find issue has new relay also and checked fuses.
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Sunday, May 28th, 2023 AT 3:07 PM

8 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,124 POSTS
Hi,

Have you checked fuse 20 in the under-hood fuse box? If not, confirm there is power to and from it.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Next, at the relay, one of the connector pins (either 30 or 87) should have power at all times. Check that. On the opposite side of the relay, pins 85 and 86, one will only have power with the engine running and the AC requested. Check that.

Let me know what you find. See pic below.

Take care,

Joe

See pic below.
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Monday, May 29th, 2023 AT 8:05 PM
Tiny
ROBBINS
  • MEMBER
  • 8 POSTS
Yes, it will kick the compressor on if I bypass relay, so I changed the relay and no luck, but I found someone has been in the A/C system before after removing condenser and the condenser looks fine. No clogs new expansion valve. Have not swapped the condensor thermostat yet or control panel.
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Tuesday, May 30th, 2023 AT 4:54 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,124 POSTS
Hi,

If you are able to jump the secondary side of the relay and the compressor engages, the problem is on the primary side. Are you getting power and a ground reference there?

Let me know.

Joe
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Tuesday, May 30th, 2023 AT 9:22 PM
Tiny
ROBBINS
  • MEMBER
  • 8 POSTS
Going to check that tonight and control panel.
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Wednesday, May 31st, 2023 AT 4:53 AM
Tiny
ROBBINS
  • MEMBER
  • 8 POSTS
Okay, so, A/C system is new but can't get past po533. I think problem in on primary side but don't know what else to check.
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Saturday, June 3rd, 2023 AT 3:32 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,124 POSTS
Hi,

I agree, but the P0533 may be preventing the relay from actuating. I attached the diagnostics below specific to the code. Take a look through them and let me know if you are comfortable performing them.

Take care,

Joe

See pics below.
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Saturday, June 3rd, 2023 AT 9:39 PM
Tiny
ROBBINS
  • MEMBER
  • 8 POSTS
I found the problem, it was blower motor resistor stopping clutch from engaging. Fixed resistor all is fine. Thanks for all the help.
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Monday, June 5th, 2023 AT 12:48 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,124 POSTS
Hi,

Thanks for the update. I'm glad to know you got it fixed and things are working again.

Regardless, take care, and feel free to come back anytime in the future.

Joe
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Monday, June 5th, 2023 AT 7:42 PM

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