Air conditioner

Tiny
DWAYNE MICHNAL
  • MEMBER
  • 1994 MAZDA 626
  • 2.0L
  • 4 CYL
  • FWD
  • MANUAL
  • 160,000 MILES
My low side runs at 60 plus and high side runs at 200. Condenser is clean, fans are running and the compressor is working ( I can hear it click in and out )Does not blow cold air at all when it is idling. I am on very low income and really cannot afford to take it to a shop, but I can work on about anything. Where do you think I should start looking for the problem or what do you think it might be. Thank you so very much for your help. P.S. I am glad I found your website. Keep up the good work.
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Thursday, August 4th, 2016 AT 10:33 AM

18 Replies

Tiny
RIVERMIKERAT
  • MEMBER
It sounds overcharged to me. Low side pressure is about three times spec of 21-26 PSI for manual system and 16.5-24.5 for automatic.
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Thursday, August 4th, 2016 AT 10:58 AM
Tiny
DWAYNE MICHNAL
  • MEMBER
Thank you so very much. Someone said it might be a part under the glove box that looks like a copper part four inches long that looks like it has a window looking plug in it. He said it could be plugged. Do you know the name of that and if that could be one of the problems if it is not over charged.
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Thursday, August 4th, 2016 AT 11:07 AM
Tiny
RIVERMIKERAT
  • MEMBER
If it is what I am thinking it is, it is the evaporator thermos-witch. Essentially, the overcharge causes system components to freeze and things just stop working from there.
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Thursday, August 4th, 2016 AT 11:11 AM
Tiny
DWAYNE MICHNAL
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Thank you with all my heart. Your truly a life saver. I hope you have a blessed day as you have blessed mine.
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Thursday, August 4th, 2016 AT 11:57 AM
Tiny
WRENCHTECH
  • EXPERT
I do not think this system is overcharged. The high side does not reflect that. I would see what the pressure does when the engine is throttled up. If it drops down into normal range at two thousand RPMs, I would say the compressor is failing.
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Thursday, August 4th, 2016 AT 11:57 AM
Tiny
RIVERMIKERAT
  • MEMBER
Even though Mitchell says the low side pressure is almost three times over spec Wrench? I will admit that I am not the world's best air conditioner expert, but spec is spec, right?

And yes, high side is basically dead on spec.
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Thursday, August 4th, 2016 AT 12:12 PM
Tiny
WRENCHTECH
  • EXPERT
The low side is too high and in comparison, the high side is too low. Those are symptom of a compressor not keeping up at low RPM. If the system was overcharged, the high side would have been much higher also.
The only other thing that could explain those numbers is a stuck wide open expansion valve. The 2000 RPM test would answer that.
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Thursday, August 4th, 2016 AT 12:16 PM
Tiny
RIVERMIKERAT
  • MEMBER
Okay, I knew I should have paid more attention in class all those years ago. Mitchell says high side should be between 185 and 213, which puts 200 dead in the middle.
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Thursday, August 4th, 2016 AT 12:24 PM
Tiny
WRENCHTECH
  • EXPERT
That totally depends on the outside temperature, cooling fan speed and condenser condition.
It really is not that far off, but if you are going to attribute the low pressure reading to overcharge, the high side would be higher also. I would really like to know what it does at two thousand.
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Thursday, August 4th, 2016 AT 12:29 PM
Tiny
RIVERMIKERAT
  • MEMBER
Okay. Hopefully he will get back to us soon.
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Thursday, August 4th, 2016 AT 12:31 PM
Tiny
DWAYNE MICHNAL
  • MEMBER
It might be a few days, but I will let you guys know what I find out. A big thanks to you all.
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Thursday, August 4th, 2016 AT 1:09 PM
Tiny
DWAYNE MICHNAL
  • MEMBER
Enter reply. To all my fans out there, haha. Seriously, I am new to this site and I want to make sure that I give you guys an update on what I found out about my air conditioner questions. Hopefully my message here is going through right now. Do I just sign back in like I am doing now. I just wanted to say thank you for every one's help. Please let me know how to give you all an update. Thanks again everyone
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Thursday, August 4th, 2016 AT 6:36 PM
Tiny
WRENCHTECH
  • EXPERT
You just did.
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Thursday, August 4th, 2016 AT 6:40 PM
Tiny
DWAYNE MICHNAL
  • MEMBER
You know it was. Thank for everything. Wish I could buy you a beer. Haha
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Thursday, August 4th, 2016 AT 6:43 PM
Tiny
RIVERMIKERAT
  • MEMBER
Where you live? I will be visiting the US at the end of the month. Lol
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Thursday, August 4th, 2016 AT 6:57 PM
Tiny
DWAYNE MICHNAL
  • MEMBER
I live in a little spot in the country in Missouri where I do not know if it is on the map. Haha. Town called Fisk. Where the women are few and the sheep are scared. Yes, I am a little ate up. Hahaha
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Thursday, August 4th, 2016 AT 7:04 PM
Tiny
DWAYNE MICHNAL
  • MEMBER
I am just a joker that likes to say silly things. I really do have a sense of mind. Thank for your help.
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Thursday, August 4th, 2016 AT 7:14 PM
Tiny
RIVERMIKERAT
  • MEMBER
Our pleasure. Tell your friends about us.

I am a joker too. Unfortunately, I wont be anywhere near Missouri when I visit.
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Friday, August 5th, 2016 AT 5:28 AM

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