A/C compressor wont turn on after repalcing and it has power going to it.

J02WS6TRANSAM

MEMBER
2008 HONDA ACCORD
3.5L
V6
FWD
AUTOMATIC
101,000 MILES

Hello. I have a 2008 honda accord v6 3.5. The ac wasnt working this year. I have a robinair ac machine recharged the system but realized the compressor wasnt turning on. Tested for 12 volts at the compressor and had 12 volts so figured the clutch was bad. I replaced with a new compressor and clutch unit. Put it in the car, put 4 oz oil in it vacuum down no leaks, charged. The compressor turned on for a minute or so then turned off and wont turn back on. I still have power going to the compressor. I thought I got a bad compressor, got another one, put it in and same thing, but the clutch wont engage at all. I checked before I installed the compressor that the ground screw is good and grounds to the battery. Is there something I am missing? I figured if you have 12 volt to the compressor and its new, it should work? Thank you for your help
Jon

4 Replies

SATURNTECH9

MECHANIC
30,869 POSTS

Have you checked to make sure you dont have a open terminal on the ac clutch connector?

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Wednesday, June 18th, 2014 AT 10:26 PM

J02WS6TRANSAM

MEMBER
34 POSTS

I just found that the connector in the new clutch was just too short and not actually going into the female part of the connector when plugged in. Good thinking and thanks for the help.
Now my next problem. I replaced the compressor with a aftermarket compressor, Compressor works is the brand, the put the new compressor in put the system into vacuum and leak tested good no problems, charged the system to 15.9 oz which is what it calls for and the air only comes out at 60 degrees going down the road according to a thermometer we have in the vent. I added 4 oz of oil to the compressor before I put it in and my gauges readings are where they should be, when running low side is about 28 psi and high was around 200 I think it was. It was a hot day about 90 with humidity. Any ideas why my ac is warm. When I gran the low side line under the hood, its cool but not cold with condensation on it like it should be. Could the aftermarket compressor not be working right? I am out of ideas. The clutch is engaging and running the whole time

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Thursday, June 19th, 2014 AT 3:17 AM

SATURNTECH9

MECHANIC
30,869 POSTS

So you never balanced the oil charge from the new compressor to old compressor?You just put in 4 ozs?What your supposed to do is see see how much oil you can can get out of the old compressor after you take it off. And match that amount to put back into the new compressor. If you get little to no oil out of the old compressor then you just put 2 ozs of oil into the new compressor. Also did you make sure there wasnt oil already in the new compressor?Sometimes they put oil into the compressor I dont trust the tags on the compressors on what they say about oil in the compressor. They have lied to me in the past also the fans are working correctly and there is plenty of air coming thru the radiator?I have seen sand animal fur build up bags etc restrict the amount of air being pulled thru. Also you rechecked the amount of charge in the system?Just because it didn't leak under vacuum doesnt mean it wont leak under pressure.

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Thursday, June 19th, 2014 AT 6:31 AM

J02WS6TRANSAM

MEMBER
34 POSTS

Sorry I wasnt more specific. When I took the old compressor out, only about 1 oz was in there. I drained the shipping oil out of the new compressor which I was told to do and everywhere I read I was told about 4 oz should be in a compressor so I put 4 oz in it. I am getting plenty of air comming through the radiator, the fan is working good, pulls plenty of air, and the fins are clean on both, I can feel the air pulling through. I have recovered and re charged the system a few times to try more and less freon to see if it would make a difference, but it didnt. After a few recoveries the machine pulled about 1 oz of oil out so the 4 I put in only about 3 left, so I think the oil is ok. Could it be the aftermarket compressor is working properly, even though its making pressure. I feel like the freon isnt flowing properly because the low side line isnt cold like it should be, its just cool to the touch maybe 60 degrees. Thank you so much for all your help. I am really stumped.
Jon

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Thursday, June 19th, 2014 AT 7:00 AM