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Old 06-24-2014, 09:43 AM   #1
skelator
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ac problems on Dodge hemi truck. Help!! discuss

My ac was blowing hot n cold. Low side n high side pressure's are pegging gauge. Replaced hose assembly orifice tube. Disconnected all lines n blew compressed air thru. Vacuumed down. Fed 1 can of r134 n I'm still pegging low n high side guages. Bad compressor?? What next?
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Old 06-24-2014, 09:47 AM   #2
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Does the compressor clutch engage? How many miles on your truck? What year?
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Old 06-24-2014, 09:48 AM   #3
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Quote:
Originally Posted by skelator View Post
My ac was blowing hot n cold. Low side n high side pressure's are pegging gauge. Replaced hose assembly orifice tube. Disconnected all lines n blew compressed air thru. Vacuumed down. Fed 1 can of r134 n I'm still pegging low n high side guages. Bad compressor?? What next?
that
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Old 06-24-2014, 09:58 AM   #4
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2007 Dodge hemi 5.7 113,000
Yes the clutch is engaging
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Old 06-24-2014, 10:02 AM   #5
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that
I hope not. I wonder what a compressor cost?
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Old 06-24-2014, 10:08 AM   #6
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Compressor.

$227.79 for the four piece kit from rockauto.com
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Old 06-24-2014, 10:10 AM   #7
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Surprisingly enough I bought my last compressor on amazon and it was cheaper than anywhere else. Sold the car after though so can't tell you how long it actually lasted
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Old 06-24-2014, 10:21 AM   #8
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Compressor.

$227.79 for the four piece kit from rockauto.com
Not as bad I thought it would be.

Gonna order one at end of today I guess when I feel a 100% it's my problem
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Old 06-24-2014, 10:28 AM   #9
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What's your static pressure reading?
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Old 06-24-2014, 10:35 AM   #10
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If you need a compressor please call the Discount Auto Parts Exchange
5115 Cornish St Houston, TX 77007 (713) 861-2373.
Good people and all they do is A/C. Huge inventory and great service and price.
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Old 06-24-2014, 10:38 AM   #11
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What's your static pressure reading?
Engine off. Gauge's connected. Low pressure pegged gauge, high side 130
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Old 06-24-2014, 10:39 AM   #12
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If you need a compressor please call the Discount Auto Parts Exchange
5115 Cornish St Houston, TX 77007 (713) 861-2373.
Good people and all they do is A/C. Huge inventory and great service and price.
Thx
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Old 06-24-2014, 10:47 AM   #13
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Only one can of freon installed.
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Old 07-20-2014, 09:47 PM   #14
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Quote:
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Engine off. Gauge's connected. Low pressure pegged gauge, high side 130
More then likley the Highside of the guage is also reading 130, Im sure it snapped the shaft.
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Old 07-20-2014, 11:39 PM   #15
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Fan? Does in have a clutch or is electric. Is is working? When you think of A/C, don't think in terms of cold. It removes HEAT, it takes the heat from the inside of the vehicle and gets rid of it through the condenser. So if you're not moving air through the condenser the head pressure will be excessive. This also means also that you are not changing the state of the refrigerant from a gas to a liquid before it gets to the expansion tube. So make sure you have air flow and check your condenser for any restrictions, trash or dirt that could reduce its efficiency.
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Old 07-22-2014, 10:38 AM   #16
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sell it. that dodge AC will go out every year from here on out...
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Old 07-22-2014, 10:42 AM   #17
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sell it. that dodge AC will go out every year from here on out...
It's almost paid off, going back to Chevy soon!
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Old 07-22-2014, 11:56 AM   #18
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If the low and high side are equal, the valves on the comperssor could be open. Think of it just like an engine. Because that is what it is. It has pistons, and valves to move the freon through the system just like an engine moves air\fuel through it. when pressures are the same, the compressor isn't working. It may be spinning but the valves have to open and close between cycles.
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Old 07-22-2014, 12:21 PM   #19
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New OEM compressor, same problem, no change. Gotta be the condenser but compressed air blew thru it
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Old 07-22-2014, 12:30 PM   #20
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You have the following components in an AC.
Compressor
Clutch
Condensor
Evaporator
Expansion Valve or Orface
Dryer

If the compressor was working, It would suck down the low side really fast and short cycle the compressor. Are you sure the clutch is working? That would explain the issue you are seeing. So check the fuse that powers the clutch or hook up a wire to 12vdc + and see if it clicks on. These are the only 2 things out of all those that would cause high pressure on the low side.
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