Recharged ac. Compressor still won't kick on. Now what? - Turbo Dodge Forums : Turbo Dodge Forum for Turbo Mopars, Shelbys, Dodge Daytona, Dodge SRT-4, Chrysler PT Cruiser, Omni and more!
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post #1 of 21 Old 04-25-2008, 01:20 PM Thread Starter
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Recharged ac. Compressor still won't kick on. Now what?

I bought a recharge/retrofit kit to recharge the a/c. Plugged the hose into the compressor, and emptied a can. The compressor still won't kick on. Any help?
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post #2 of 21 Old 04-25-2008, 01:30 PM
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Re: Recharged ac. Compressor still won't kick on. Now what?

Does the recharge kit have a pressure gauge? Does it read full? How long has the system been empty? Maybe a stuck H-valve??? Bad pressure switch??
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post #3 of 21 Old 04-25-2008, 01:33 PM Thread Starter
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Re: Recharged ac. Compressor still won't kick on. Now what?

Yeah. It was on zero. then i started filling. It went up to red, and it still wouldn't kick on. As for how long it's been empty, at least since october. I don't know because that's when i bought the car.
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post #4 of 21 Old 04-25-2008, 01:46 PM
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Re: Recharged ac. Compressor still won't kick on. Now what?

Add refrigerant until your gauge reads full (do not overfill). Pressure switches won't allow the compressor clutch to engage if even if the system is low on refrigerant. It's always best to have the system checked for leaks, vacuumed down and then refilled (a small amount of debri and moisture in the system is obviously bad). You could try jumping the pressure switch (jump the switch connector with a piece of wire) and see if the compressor cycles.
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post #5 of 21 Old 04-25-2008, 01:48 PM Thread Starter
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Re: Recharged ac. Compressor still won't kick on. Now what?

where may i find that switch. I know nothing about AC systems. I just know i had it quite full, pretty far in the red. I'm pretty sure if the compressor kicks on that'll relieve pressure. it did it in the daytona
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post #6 of 21 Old 04-25-2008, 01:59 PM
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Re: Recharged ac. Compressor still won't kick on. Now what?

Have you checked if the compressor is locked up? These compressors like to do that. I know forsure the GLHS's just locked up last summer. Drop the belt and see if the sucker will turn. Also check wiring to the Compressor.
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post #7 of 21 Old 04-25-2008, 02:05 PM Thread Starter
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Re: Recharged ac. Compressor still won't kick on. Now what?

I tried the idiot fix.

i tapped it gently with a hammer :) It didn't work :(

I'll check to see if i can spin it tomorrow. I have to go to work in a couple hours so i don't have too much time to experiment today. Maybe while i'm driving, the lubricant that went in with the coolant can loosen it up
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post #8 of 21 Old 04-25-2008, 02:18 PM Thread Starter
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Re: Recharged ac. Compressor still won't kick on. Now what?

I put my hand to the side of the compressor and tried to twist it. I didn't take the belt off. but that thing spins.
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post #9 of 21 Old 04-25-2008, 02:50 PM
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Re: Recharged ac. Compressor still won't kick on. Now what?

Could be something simple like the fuse, or the A/C relay. Make sure you only have the low pressure valve open & not the high pressure side. High side open= EXTREMELY dangerous. An entirely empty system should hold about 30 ozs., including the a/c oil.
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post #10 of 21 Old 04-26-2008, 12:34 AM Thread Starter
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Re: Recharged ac. Compressor still won't kick on. Now what?

I'm not sure which fuse to check. THe fan blows, the wires are connected
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post #11 of 21 Old 04-26-2008, 06:52 AM
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Re: Recharged ac. Compressor still won't kick on. Now what?

First, when retrofitting only fill the system to 80% with R134A of what the R12 capacity was.
Electrically start by checking for power at the A/C compressor connector DB/BK wire with the connector unplugged and A/C on. Then check to see if the ground(BK wire) is ok. If power and ground are ok your problem is in the clutch coil,if the compressor was locked up the clutch would still engage.
If no power is present start at the A/C pressure switch (on the Expansion Valve, aka.H-Valve on the firewall R/S).Check for power on the DB/OR wire with the A/C on(power is supplied from the A/C-Heater control unit).If power is present jump the pressure switch connector and see if the compressor engages,if so replace the pressure switch. If the switch checks ok check for power at the A/C clutch cutout relay(L/S fender),Power in is on the DB wire and the BN wire, power out to the compressor is on the DB/BK wire, the ground side of the relay is controlled by the LM on DB/OR wire on the Blue connector cavity #3.If you have power at 2 sources and ground is ok but no output replace the relay.
If power is ok and no ground you will need a scanner to see if the controller is seeing the request for A/C.
If you can get ahold of a scanner you can actuate the relay thru the scanner.
Fault code 33 is for the A/C clutch relay circuit.
If TPS voltage is too high you will not get A/C, the controller disengages the compressor thru the relay at WOT conditions.

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Last edited by NAJ; 04-26-2008 at 07:08 AM. Reason: OOPS, Clicked reply before I was done.
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post #12 of 21 Old 04-28-2008, 03:00 PM Thread Starter
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Re: Recharged ac. Compressor still won't kick on. Now what?

what does the pressure switch look like
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post #13 of 21 Old 04-28-2008, 03:54 PM
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Re: Recharged ac. Compressor still won't kick on. Now what?

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post #14 of 21 Old 04-28-2008, 04:52 PM Thread Starter
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Re: Recharged ac. Compressor still won't kick on. Now what?

Thanks. Im not sure where that is in reference to the compressor.

Anyway, i did step one. I unplugged the AC compressor, and tested it and got nothing
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post #15 of 21 Old 04-28-2008, 04:54 PM
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Re: Recharged ac. Compressor still won't kick on. Now what?

Follow the A/C lines back toward the firewall. The lines bolt to the H-Valve and the pressure switch screws into the side of the H-Valve.
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