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  #1  
Old 07-24-2011, 10:04 AM
tommykaw tommykaw is offline
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Default Added the R134A but.......

I added the R134A to my AC system and still the compresser refuses to come alive. The guage on the can is to the edge of the green right before it hits RED , which i believe is overcharged....Where do I go from here. The lights for the ac comes on in the console so i think the fuse is good. Could the compresser be shot. BY the way its a 1994 B3000 with a 3.o and a five speed..any clues or help would be appreciated. thanks Tom
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Old 07-24-2011, 10:06 AM
djfllmn djfllmn is offline
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Default Re: Added the R134A but.......

compressor clutch might be toast
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Old 07-24-2011, 10:07 AM
schultzkenneth schultzkenneth is offline
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Default Re: Added the R134A but.......

Try to jumper the pressure switch. The one that went out on mine plugged into the accumulator/drier, i believe that is the high pressure side. All i did was unplug it, take a good size paper clip and bend it to stick in there. Then turn the truck and AC on and see if the compressor cycles. Hopefully that's all it is cause its a cheap fix. Good Luck
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Old 07-24-2011, 10:15 AM
FireRanger FireRanger is offline
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Default Re: Added the R134A but.......

That's the low pressure side of things and the low pressure switch. Other culprits include fuses (check your manual) and the AC Compressor relay.
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Old 07-24-2011, 10:40 AM
schultzkenneth schultzkenneth is offline
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Default Re: Added the R134A but.......

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Originally Posted by FireRanger View Post
That's the low pressure side of things and the low pressure switch. Other culprits include fuses (check your manual) and the AC Compressor relay.
Ahhh yeah, your right, now that i think back, it was the low side. Good news is if that's the problem, the low pressure switch is the cheaper of the two.
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Old 07-25-2011, 06:09 AM
tommykaw tommykaw is offline
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Default Re: Added the R134A but.......

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Originally Posted by djfllmn View Post
compressor clutch might be toast
Is there a way to over ride it to test the compresser? I see compressers on fleabay for about 80 bucks and it looks lile its only 4 bolts to replace it...thanks for the reply Tom
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Old 07-25-2011, 06:32 AM
tommykaw tommykaw is offline
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Default Re: Added the R134A but.......

Quote:
Originally Posted by FireRanger View Post
That's the low pressure side of things and the low pressure switch. Other culprits include fuses (check your manual) and the AC Compressor relay.
I checked the fuses they seem good..I'll have to try to override the compresser to see if it neeeds replacing.. thanks Tom

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Quote:
Originally Posted by FireRanger View Post
That's the low pressure side of things and the low pressure switch. Other culprits include fuses (check your manual) and the AC Compressor relay.
Quote:
Originally Posted by schultzkenneth View Post
Ahhh yeah, your right, now that i think back, it was the low side. Good news is if that's the problem, the low pressure switch is the cheaper of the two.
Good to seee its on the cheaper side, thanks Tom
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Old 07-25-2011, 06:56 AM
dvrich dvrich is offline
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Default Re: Added the R134A but.......

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Originally Posted by tommykaw View Post
I checked the fuses they seem good..I'll have to try to override the compresser to see if it neeeds replacing.. thanks Tom

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Good to seee its on the cheaper side, thanks Tom


Pull the plug off of the compressor and check for 14 volts with the air turned on. If it reads zero it could be a bad pressure switch or a fuse.
If it reads 14 volts then the compressor clutch assemby or solenoid is bad. A clutch assembly runs about $100 at autozone, buy another compressor.
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Old 07-25-2011, 07:56 AM
FireRanger FireRanger is offline
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Default Re: Added the R134A but.......

Well, anywhere from 13.2-14.2 is "normal" for the engine running and alternator generating power. Don't fret if it isn't exactly 14. Though if the engine is running and you happen to notice the voltage is more like 12 something, you have an alternator problem too

There is a relay in the power distro box under the hood for the compressor clutch as well. You can swap it with other relays to check that.
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  #10  
Old 07-26-2011, 06:14 AM
tommykaw tommykaw is offline
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Default Re: Added the R134A but.......

Quote:
Originally Posted by dvrich View Post
Pull the plug off of the compressor and check for 14 volts with the air turned on. If it reads zero it could be a bad pressure switch or a fuse.
If it reads 14 volts then the compressor clutch assemby or solenoid is bad. A clutch assembly runs about $100 at autozone, buy another compressor.
Thanks, I'll try that....ride safe Tom

----------

Quote:
Originally Posted by FireRanger View Post
Well, anywhere from 13.2-14.2 is "normal" for the engine running and alternator generating power. Don't fret if it isn't exactly 14. Though if the engine is running and you happen to notice the voltage is more like 12 something, you have an alternator problem too

There is a relay in the power distro box under the hood for the compressor clutch as well. You can swap it with other relays to check that.
I'll see if I can swap out that relay...if the power is coming in..it looks like a new compresser/clutch..

thanks for the reply Tom
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