Cannot fully recharge the A/C

Tiny
REUBEN VAN H
  • MEMBER
  • 2005 DODGE RAM
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 110,000 MILES
When refilling my A/C gas on the the low pressure nozzle, the gas gauge on the bottle goes straight to the red, it says to not continue the refill.
My A/C light comes on okay, but the clutch doesn't seem to engage, the blower fan blows strong though. What can it be?
Thanks
Reuben
Tuesday, May 5th, 2020 AT 7:09 PM

6 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Most likely the issue is either the compressor does not have power or the compressor has failed. If the clutch doesn't engage on the front of the compressor then we need to check for power at the compressor to make sure the PCM is commanding it and the relays and fuses are okay and delivering voltage. If it is not doing this then we need to track that down.

If it is then the compressor is probably the issue. However, I would suggest starting with getting an actual gauge set that you can rent from a parts store that has a rental program and checking the high and low side pressures.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

If the pressures are okay then we can move on but those gauges on the refill cans are not accurate enough to determine what the next steps are.
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Friday, April 23rd, 2021 AT 11:08 AM
Tiny
REUBEN VAN H
  • MEMBER
  • 3 POSTS
Thanks much will check.
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Friday, April 23rd, 2021 AT 11:08 AM
Tiny
KASEKENNY
  • MECHANIC
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Sounds great. Please let us know what you find. We will be here if you need more help. Thanks
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Friday, April 23rd, 2021 AT 11:08 AM
Tiny
REUBEN VAN H
  • MEMBER
  • 3 POSTS
Hi, checked the wires, relays, fuses, let some gas out, pulley turns freely. What else can it be. Let more gas out, recharge bottle gauge still in the red.

Thanks much.
Reuben
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Friday, April 23rd, 2021 AT 11:08 AM
Tiny
REUBEN VAN H
  • MEMBER
  • 3 POSTS
Will check.

Thanks much.
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Friday, April 23rd, 2021 AT 11:08 AM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Okay. So when you hook up the recharge bottle, the gauge is in the red? Can you get a picture of what you are seeing?

Also, I think we are getting to the point we are going to need to rent a gauge set so we can see what the high and low side pressures are. Thanks
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Friday, April 23rd, 2021 AT 11:08 AM

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