Automotive Air Conditioning Information Forum

2006 Hyundai Sonata

Issue:
System will not hold vacuum, post-replacement. System equalizes from vacuum in just 30mins, which suggests (to me) a rather large opening... somewhere.

I realize that negative pressure indicates an opening in a system, while positive pressure reveals it. I lack the ...

AC... healed !

The problem with the compressor clutch not activating was the very FIRST item listed in bohica2xo contribution to this thread:
1) Charge level. Not enough refrigerant system pressure will inhibit clutch operation

After I brought the charge to mfg's spec--using the correct ...

I'll recheck the transducer at first opportunity. I'm uncertain of my initial check anyway.

If this sensor (and the others) test OK, I'll intuitively suspect the climate control console before the PCM. It'll suck if that thing is flaky.

As for the "code reset"...
I should have listed doing that ...

First things first...
Thank you. I genuinely appreciate your help. I realize it is frustrating—and mostly futile—lobbing intermittent sans serif advice across this medium at some anonymous ad hoc a/c tech poseur, 'specially when all indications suggest a problem better suited for a laying of the ...

Bleh. I definitely don't like chasing my own tail. Nor do I like firing the parts cannon at a problem.

I eliminated the fuses, the engine control and clutch relays, controls, wiring harness, pressure sensor resistance, and clutch gap first. Not only because these items are (relatively) easy to ...

Nope. ...er'm... not yet, I mean. Gotta remain optimistic for the missus, lest she think me incompetant.

You may recognize the other phase of this problem here.

Thanks for your response.

So after I processed your comment about the tach, I plugged in my scan tool to get a more accurate reading of RPM. Problem is, this tool reports RPM real-time. And since RPM reading fluctuates constantly, as expected, it's pretty much impossible to discern any effect from ...

One might infer that a shorted field coil would blow an upstream fuse (two 10A fuses feed both "sides" of the field coil relay). But the fuses and relay test good. I don't get how an field coil can (apparently) "burn" without blowing out something else other than itself--maybe field coil innards are ...

resistance was ...zero.

The old coil was pretty yucky. The epoxy had melted and the resistor was exposed.

btw, the new field coil has a resistance of ~3.7Ω.