A/C compressor help - Page 2

MT-2500 · 05-14-2007, 12:25 PM

Quote:

Originally Posted by laxman21

I'll OHM it tonight.

Are you saying that if the low side has 65 when the compressor is off, it's a bad compressor?

What OHM reading should I get on the switch.

Do I have to drain the system to replace the switch?

No on the 65 low side comp off.

But the low side switch should be making contact threw it or show OHM"s reading for contact with 65 lbs.
The low side switch turns off or opens contact at around 28 lbs or lower.
Over 28 lbs it makes contact and under 28 lbs it opens up/no contact.

The switch will just screw off and on. No drain No problem changing it.

laxman21 · 05-16-2007, 07:49 AM

On the 200 OHM setting I got reading of .3 OHMS.

MT-2500 · 05-16-2007, 09:26 AM

Quote:

Originally Posted by laxman21

On the 200 OHM setting I got reading of .3 OHMS.

The switch is not turn on or making contact.
Try another switch.
MT

laxman21 · 05-16-2007, 10:34 AM

Quote:

Originally Posted by MT-2500

The switch is not turn on or making contact.
Try another switch.
MT

Will Do.

laxman21 · 05-16-2007, 10:47 AM

BTW, where can I get one?

MT-2500 · 05-16-2007, 11:23 AM

GM parts dealer or you auto parts place will have them.

laxman21 · 05-22-2007, 09:09 AM

picked a few up at the recycling yard, and a few worked, so I started fooling around with some taking OHM readings and they were all about the same. So I replaced the original one and the A/C was working, if I played with the it. Guess it must have been a clog or loose connection.

Anyone need a sensor, I have several, ytellow, black and brown.

MT-2500 · 05-22-2007, 10:03 AM

Glad you got it working.
They do have some wiring problems at the plug in on the switch.
If it gives you any more problems try a different plug in wiring.
Good Luck
MT

frehol · 06-01-2007, 06:57 AM

Hi, me again.

My low press switch act like it does not work so I thought I screw it out and check it, but it started bubbling at it when I tried to unscrew it.
As MT say "No drain" I like to know if mine is different then laxman's?
Can someone post a photo of it? I'll try to post one myself soon...

/Freddy

Quote:

Originally Posted by MT-2500

The switch will just screw off and on. No drain No problem changing it.

MT-2500 · 06-01-2007, 10:28 AM

Quote:

Originally Posted by frehol

Hi, me again.

My low press switch act like it does not work so I thought I screw it out and check it, but it started bubbling at it when I tried to unscrew it.
As MT say "No drain" I like to know if mine is different then laxman's?
Can someone post a photo of it? I'll try to post one myself soon...

/Freddy

It is normal for it to lose a little bit of gas when you unscrew or install it.
But better to start a new thread/post on yours and give year and all info on what it is doing or not doing.
MT

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