Is your new compressor for r134a?
3FE - troubleshooting A/C issue
- Thread starter alphaeighteen
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That does not even have the correct pulley on it.
You don't have the correct part. Return it ASAP, as you only get 90 days with RockAuto.
- Thread starter
- #44
Damn that sucks! Rockauto lists it as a compatible part but I guess it's not....
That's a ribbed belt pulley... Not likely the right one.
@BILT4ME beat me to it!
You want Denso #471-1166
It does fit. The reason that they don't show it is because it comes with PAG46 oil for an R134a system and your year was originally R12. They don't understand that it's exactly the same compressor except for the oil, which is easy to change.
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- #49
Awesome. Ordered!
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- #50
Rebuilt everything and it holds a good vacuum. Now I can't get the ac compressor to kick on!! I'm showing good low sided pressure.
There is a clip at the top of the evaporator core box which is not plugged in. Does this need to be plugged in? I could not find a plug for it.
- Thread starter
- #51
To clarify, I cannot get the compressor to kick on and charge the r134a...
it's for relay 90987-02004 , if your relay still not clicking after pushing AC button, maybe you need this relay
This is one time I jumped the compressor, so it would pull new refrigerant in. @flintknapper might rap my knuckles, but it worked for me.
If you're holding vacuum, the low-pressure cutoff switch is for sure not letting the compressor kick on yet.
Did you put the oil in?
- Thread starter
- #54
This is one time I jumped the compressor, so it would pull new refrigerant in. @flintknapper might rap my knuckles, but it worked for me.
If you're holding vacuum, the low-pressure cutoff switch is for sure not letting the compressor kick on yet.
Did you put the oil in?
The compressor Came with Oil from the factory. My understanding is that it's enough for the whole system. Do I need to add more?
I may try jumping it...
I'm not sure how much oil it needs, just that it does require oil. If the instructions it came with indicate that it's good to go on oil, then I would trust that. If not, you may need to get a small can of pag46 -which is the appropriate oil for r134a.
The ones I've used have looked like a smaller r134a can. They feed the same way, too.
You shouldn't NEED to jump the compressor, as the can of refrigerant should pressurize the low side enough to activate the low pressure switch and kick the compressor on.
Also, are you trying to feed the refrigerant through the manifold gauge set? I tried that too, and had trouble. After I used the manifold to confirm I held a good vacuum, I ended up just using my trusty fill hose/gauge that looks like this:
A/C Pro EZ Chill Auto A/C Recharge Kit with Reusable R-134A Gauge and Hose - Walmart.com
Buy A/C Pro EZ Chill Auto A/C Recharge Kit with Reusable R-134A Gauge and Hose at Walmart.com
www.walmart.com
If you don't have that, try loosening the manifold/gauges' hoses a tiny bit... If they're rented, their entire service life has likely been as somebody's first time doing this. The orings get mashed, and tightening them fully can seal off that hose. Counterintuitive, I know.
Either way, get us a photo of the current status of the gauges.
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The Denso brand compressors come with a full system charge of oil, so no need to add more. It's acceptable to jump the compressor to help get the refrigerant in, just remember to remove the jumper once it has adequate charge.
@alphaeighteen, how did this go?
- Thread starter
- #58
Looks like my post didn't go through a few weeks ago....
The denso control unit wasnt seated correctly and I've fixed and button everything up now. It's blowing ice cold now!
The only thing I've noticed is that the water dumps from the evaporator way more than my other cars. Is this common for it to be dripping that much?
The denso control unit wasnt seated correctly and I've fixed and button everything up now. It's blowing ice cold now!
The only thing I've noticed is that the water dumps from the evaporator way more than my other cars. Is this common for it to be dripping that much?
Where is it dripping from? If it's inside the truck, I'd be worried about a coolant leak at the heater core.
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- #60
It's dripping from the evaporator box where it's connected to the drain out of the cabin.