[ant46]

Hi, I am having a problem with my 2007 Civic hatch a/c compressor not engaging when the a/c is turned on. I have done the following tests.

Jumping the wire on the alternator leading to the compressor - the compressor engages and cold air blows out the vents almost instantly as it should when the a/c is working. The a/c runs perfectly when I jump this wire from 12v on the battery for as long as it is jumped.

Both radiator fans come on when the a/c is switched on.

I can feel the click on the relay switch in the fuse box when the a/c is turned on.

I had the coolant levels checked and they are fine.

Any guidance on the likely cause of this problem would be much appreciated. Than you.

 

[Mike N]

Do you have the old Omron or the new Mitsuba ac clutch relay?
If it's the Omron relay you can't be shure it's working properly just because it's clicking.

 

[ant46]

I have a Denso a/c clutch relay, I bought the car with the Denso relay. How would I check if the relay is faulty?

 

[BioTeq]

Unless your compressor died it will be a faulty relay, I've had the same issue.

 

[ant46]

Went and got a new relay today, the old one was faulty even though it was clicking. A/c working perfectly again. Thanks for the help.

 

[adamd]

Where did you get your relay from mate?

 

[ant46]

From a local auto parts shop, its Toyota branded but it fits and works fine so I'm happy. Payed the equivalent of $5 for it.