Comments on: DIY: How to Recharge Your Cars Air Conditioner

By: Veiseerseqo

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By: Kyle

Kyle — Tue, 27 Sep 2011 17:02:39 +0000

Huh, I didn’t know you could recharge a car AC.

By: Jerry

Jerry — Fri, 15 Jul 2011 22:39:22 +0000

Really a lot of help.Everything I wanted to know about recharging the ac on my ‘88 Dakota was right there, thanks for the help.

By: sandeep

sandeep — Fri, 03 Jun 2011 20:33:40 +0000

i tried to follow your procedure. but when i connected recharge can’s hose to low pressure side, the PSI reading on the recharge can’s gauge read “zero” initially. but suddenly the PSI reading went up all the way to 150. so i just disconnected the hose. what could this be? FYI: it’s a ‘99 civic stick shift and a/c blows cold air, but not cold enough for a sunny day.

By: Local Plumber

Local Plumber — Wed, 01 Jun 2011 01:30:53 +0000

Great how to on recharging your ac on your car you have great step by step pictures along with directions

By: Scott hale Plumbing@HVACS Salt Lake City

Scott hale Plumbing@HVACS Salt Lake City — Wed, 12 Jan 2011 01:26:18 +0000

I had no idea that it was even possible to recharge your car AC

By: Sarah

Sarah — Mon, 27 Sep 2010 17:47:22 +0000

So my car is a 1985. Am I SOL?

By: Jeff

Jeff — Sun, 18 Jul 2010 04:03:11 +0000

On a system that is “Flat” or completly out of charge. The system needs to be “Evacuated” or have the air and moisture in the system removed prior to charging. This can be done in either of 2 (two) ways.
1.) evacuating the system. or…
2.) purging the system.
Purging requires attaching a can of “refrigerant” to the Lo side port and “loosening” the schrader valve on the “Hi side”.(like in a bicycle tire) or depressing the valve.
With the system AND motor OFF, add refrigerant to the Lo side, allowing air to escape from the “Hi” side. This will force much of the air in the system out giving you a better outcome.
Remember to tighten any thing you have loosened, Charge as directed on the next can. Good Luck
The best outcome would be from a A/C professional.

By: Mark

Mark — Wed, 16 Jun 2010 00:22:24 +0000

I agree with Cold One. You’re recharging because you have a leak. Fixing the leak is not that simple…a shop that specilaizes in AC repairs is best suited to do this. Otherwise you’ll find yourself recharging continuously.

If you’re ok with recharging once or twice a year, ok. Any more than that and you’ve got a leak that will always outpace your recharges.

By: Paul

Paul — Wed, 13 Jan 2010 01:20:53 +0000

One thing that I question is why you don’t have to “bleed” air out of the filler hose before charging. It seems to me you would be pumping a small amount of air and moisture into the AC line before the refrigerant goes in. I plan on charging my home heat pump. Any comment?

By: Danny Boy

Danny Boy — Sun, 02 Aug 2009 16:00:02 +0000

Cold One, you need to get a life for crying out loud. People like you are the reason that shops think they can charge the earth for simple jobs.

By: DIY: How to Add Refrigerant to a Homes Heat Pump | Milk Your Money

DIY: How to Add Refrigerant to a Homes Heat Pump | Milk Your Money — Wed, 03 Jun 2009 15:00:26 +0000

[...] follow up on a recent post describing how to recharge your car’s air conditioner, I’d like to take the issue further and describe the process of charging your home’s air [...]

By: Blake

Blake — Fri, 29 May 2009 12:34:36 +0000

Awesome, for several years now I really could have invested in a recharge, but since it wasn’t a necessity, and I’m on the ultra-frugal college budget, it didn’t get done. Instead, I (along with any passengers) suffered through the worst of Iowa’s heat and humidity without decent air!

This is great; never thought of DIY route. Thanks for sharing!

By: Jessie

Jessie — Thu, 28 May 2009 21:26:08 +0000

If only I had an air-conditioner to re-charge….

Great tips!

By: Cold One

Cold One — Thu, 28 May 2009 20:34:39 +0000

To be correct, you would not use the name ‘FREON’ to describe the substance that is injected into the A/C compressor. ‘FREON’ is a tradmark name copyrighted by DuPont. The generic term is ‘REFRIDGERANT’.

The above excercise (recharging of the A/C system) is a quick fix, to be sure. It may or may not last, as it really is a band-aid. There is only one reason why an air conditioning unit needs to be recharged: There is a leak in the system. Leaking A/C units mean refridgerant being released into the atmosphere.

CAUTION should be taken as to the brand of refridgerant that is used. Many of them are propelled by propane. This can be a disaster (and many shops who do A/C repair also have a ‘refriderant identifier’ which will give them the red or green light to proceed with the repair. Depending on the result, the shop may well just tell you to go away. It can be VERY dangerous.

One last note: The gauges that come with these kits are not accurate at all. A look at a shop manual (from the manufacturer) of any given car will indicate EXACT pressures (high side and low side). As much as 1/100th of a pound to much or two little can affect the cooling capabilities of the A/C unit, can mean to much lubricant in the system (or too little) and can cause the leak to worsen and/or the clutch to seize.