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AC Compressor Intermittently Stops working

absoffthewake on Wed May 28, 2008 10:36 PM User is offline

Year: 2003
Make: Honda
Model: Accord
Engine Size: 4 cly
Refrigerant Type: R134a
Ambient Temp: 85

Hey Everyone,

This one is going to drive me to drink! Although the behavior is intermittent, it usually, but not always follows this pattern of behavior.

It works great blowing cold for about 10 minutes, then blows hot for 10 minutes, then blows cold for another 10 and so on.

I figured maybe the clutch relay was sticking, replaced it but still not working. Hooking up gauges gave me these readings:

When AC Blows Cold: Low = 37 psi High = 225 psi
When AC is off: Low = 60 psi High = 190 psi
When AC is Malfunctioning: Starts Low = 85 High =175, then builds gradually to Low = 120 High = 150

When the AC decides to start again, the compressor kicks on, but the engine shudders as if it is working real hard and about to stall out, but then quickly recovers and returns to normal operation blowing cold again.

I'm figuring maybe the compressor cut off switch is malfunctioning, but of course it must be something more than that. The clutch gap seems to be okay, it's about the width of a business card.

Any help would be appreciated.

mk378 on Thu May 29, 2008 10:36 AM User is offline

See if the clutch coil is getting power when it is not working. Really sounds like a clutch problem. You can reduce the gap more as long as it doesn't drag when not engaged.

absoffthewake on Sun June 08, 2008 12:55 PM User is offline

When I originaly tested it, it appeared there was no power, but I must have not had good ground becuase when I tested it now there was power. Duh!!

I took out the washer, and it seems to be working fine now. Lets see if it lasts.

Thanks for the help! Yet again the answer was staring me right in the face, I hate that!

Edited: Sun June 08, 2008 at 7:44 PM by absoffthewake

absoffthewake on Sun June 08, 2008 1:01 PM User is offline

Spoke too soon.

Looks like it's getting power, but it's not engaging. It must be a bad clutch magneto right?

absoffthewake on Sun June 08, 2008 5:38 PM User is offline

Took out the magneto and refreshed all the ground wiring, and it all seemed to be work fine on the bench, but when I put it back it would work for a while then crap out again. I'm thinking definetly magneto at this point. Maybe when it's turned on for a while, it over heats. I don't think there is any wiring problems becuase I jumperd both the power and the ground and still got nothing. Going to try replacing that and see what happens.

Edited: Sun June 08, 2008 at 7:03 PM by absoffthewake

absoffthewake on Sun June 08, 2008 7:43 PM User is offline

Definetly Magneto,

It has 5 ohms resistance when it first engages, but after about 10 mins, it goes open. Wierd!

Is it just defective, or is something else cuasing this?

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