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air conditioner thread

 
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  • 2 Post By CREWZIN
  • 1 Post By ptprice

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  #1 (permalink)  
Old 18 Mar 2016, 11:18 am
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Default air conditioner thread

Bear with me guys, you're all awesome and have made my time owning this car a lot easier than I would have on my own with all the repairs I've tackled. So, my new problem on the list, the a\c, seems like the small time stealership didn't mention a non working a/c either. It blows air, just not cold, the compressor doesn't seem to kick in, the radiator fan doesn't come on right away when I turn the a/c on either and it doesn't seem to have 2 speeds either. I tried disconnecting the plug on top of the silver tank thing on the passenger side in the engine bay by the firewall while the a/c was on to see if it would do anything or kick on the compressor but nothing happened.

I believe the relay is still good, I need to probably have the system checked to see the coolant/freon levels. What else do you guys recommend? I really need to get it working asap.

Thank you very much for your help!

Last edited by cloudhidd3n; 18 Mar 2016 at 11:22 am.
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Old 18 Mar 2016, 01:59 pm
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Default Re: air conditioner thread

First things first, yes you need to find out if your pressures are up. That "plug" on top of the accumulator near the firewall is the Low Pressure Switch otherwise known as the recycling switch and you can jump the leads together on the switch itself after you take off the electrical connection but that's only if the compressor is still not coming on after you fill the system up.
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Old 18 Mar 2016, 02:09 pm
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Default Re: air conditioner thread

Is it possible that the compressor isn't coming on due to lack of pressure/refrigerant? How much do I fill it? I've never recharged an a/c before. Is there a gauge on the refrigerant tank that I watch while filling it up?
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Old 18 Mar 2016, 02:25 pm
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Default Re: air conditioner thread

Can't tell you. I leave that to the professionals. In your case, I would start fresh and evacuate the whole system. Add refrigerant oil and charge the system up to spec with the proper testing equipment. That's why I leave it to somebody that knows what they are doing and has that equipment.

Yes, it's possible that is all you need ...but I doubt it. You already said the fan doesn't come on when the A/C is turned on. It should so that could mean you need a new radiator fan.
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Old 18 Mar 2016, 04:41 pm
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Default Re: air conditioner thread

Crewzin's advise is well founded. Instead of just blindly recharging your A/C with freon, take it to a reliable, reasonable A/C specialist. When I say specialist I'm mean a shop dedicated to just auto A/C repair. There's too much about A/C that your run of the mill mechanic doesn't understand but you'll still pay their hourly rate till they "hunt 'n peck and hopefully find your problem.

I'll give you an example of that:
SOOO BIG's A/C compressor went south last Dec. That was immediately diagnosed by my go to A/C guy for free and a repair cost locked in for six months was arranged. Total to be just a bit over $550. He'd replace the compressor, accumulator dryer and expansion tube, along with proper evacuation, chemical flush and Freon. His cost for the compressor, $240.00, to me $250.00. I was allowed to shop on line and I found an acceptable new compressor for for less. I saved up and had it done this week. Even with the added cost of the pressure switch the bill came in at just a little over $500 including the cost of the cheaper compressor, the pressure switch and an upgrade in both the accumulator dryer and the expansion tube. All with a nice warranty too.

I'd gotten a second estimate from a big time general auto repair shop with the word "Honest" in their name of well over $1250.00. Honest?

Happy Ptin', ptprice
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Old 18 Mar 2016, 09:07 pm
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Default Re: air conditioner thread

Wow okay guys i was digging through the owners manual of my car and found a service receipt from the previous owner, serviced just 5k miles ago. It mentions the a/c leaking somewhere on the "high" side. They charged the poor guy $1400 to replace both control arms with complete ball joint assemblies, oil change, and i believe 2 front tires. According to the receipt he was having vibration at high speeds and the clutch making a slight rattling noise which they didn't fix and is still there that I believe is a throw out bearing, it goes away if clutch is pressed. Noise isn't very noticeable but there. As soon as i got the car i replaced the tie rod ends, they were knocking bad with every bump, driver cv joint and wheel bearing, did a complete tune up but looking to change my tranny oil tomorrow maybe.

Anyways Back to the a/c. Looks like I got a lead, leak on the high side according to this shop the previous owner went to.

Last edited by cloudhidd3n; 18 Mar 2016 at 09:14 pm.
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