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Old Oct 22, 2017 | 03:21 PM
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Default AC blowing hot

Just started up my c5 -- first time in a few months -- and the AC is blowing hot.

I've fixed ac's on older chevy motors -- is there anything weird / specific I need to know about the ac system on the c5? it's a 2000, the compressor is kicking on, so I'm assuming it's low on refrigerant. I have all the equipment to recharge-- what does it take, 134a? how many pounds?
Thanks!
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Old Oct 22, 2017 | 03:39 PM
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Had the same problem, check Schrader valves for leaks.
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Old Oct 22, 2017 | 03:50 PM
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Originally Posted by JMG2
Just started up my c5 -- first time in a few months -- and the AC is blowing hot.

I've fixed ac's on older chevy motors -- is there anything weird / specific I need to know about the ac system on the c5? it's a 2000, the compressor is kicking on, so I'm assuming it's low on refrigerant. I have all the equipment to recharge-- what does it take, 134a? how many pounds?
Thanks!
Yes, R-134a. Check your pressures against the chart below. Make sure you take your readings with:
  • Engine @ 2000 rpm
  • A/C in coldest setting
  • Fan at maximum speed
  • Both windows down
  • Thermometer in center air vent

When adding refrigerant, pay attention to both pressures, otherwise you might end up with the high side sky-high trying to get the low side to the chart's value.

Let us know how it goes.


Last edited by GCG; Oct 22, 2017 at 03:54 PM.
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Old Oct 26, 2017 | 06:11 PM
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You can play with DIY but there must be a leak. Better to have it checked by a tech and find the problem.
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Old Oct 26, 2017 | 11:40 PM
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if you find a leak and need a hard line replaced hit me up....I have all of them available from my part out except one that I sold today...chances are I will have it.

good luck
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Old Nov 2, 2017 | 11:27 PM
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thanks. I've replaced just about every part of the AC in my 350-equipped jeep Cherokee, pretty confident I can handle this. If not, worst thing I bring it to a mechanic.

If I decide to have a pro do it, what's better-- dealership, of local mechanic?
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Old Nov 2, 2017 | 11:55 PM
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Moving to C5 Tech.
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