A/C not cooling?

Tiny
HONDA9090
  • MEMBER
  • 1998 HONDA ACCORD
  • 3.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 190,000 MILES
The A/C compressor locked up, I replaced it and filled. Still not cooling. Checked high pressure switch, relays. Fans do not come on when A/C is switched on.
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Friday, August 4th, 2023 AT 7:00 PM

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Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,635 POSTS
Hi,

First, make sure fuse 58 in the under-hood fuse box is good and has power to and from it.

If the fuse is good, remove the compressor clutch relay. If you look at the attached pic below, for the relay circuit to be complete, we need a ground path provided by the PCM to the primary side of the relay. Once that happens, the primary becomes an electromagnet closing the circuit on the secondary side of the relay and powering the compressor.

So, with the relay out, two pins should have power. One will be a ground path to the PCM and the other will be the power supply to the compressor clutch. I need you to check for those things. Additionally, here is a link that provides a better description of the relay and its circuit for testing. Note: The primary side of the relay power source is only there with the key on. The secondary side is hot at all times.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Here is another link you may find helpful:

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Let me know what you find.

take care,

Joe

See pics below.
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Friday, August 4th, 2023 AT 10:57 PM

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