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Old 07-08-2014, 01:53 PM   #1 (permalink)
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Default AC Not Blowing Cold

Hi Guys,
found ur excellent forum tracking down an ac problem on the web. not sure if you want me to start another thread since my problem wasn't solved by the other threads.

here's the facts
neighbors 06 forenza IL, usa is moving to cali in a couple days and im trying to help him out.


no cold air coming from ac.

2 decades back someone stole all my ac stuff, evacuator, gauges, glass refrigerant measure, etc. then I started a brake repair business and never spent the 2k to replace the stuff.

tried 1lb can on low side and no indication that any entered the system, I shoulda weighed the can/gage/hose 1st, but it felt the same to me and no coldness anywhere).


clutch engages on comp when ac is turned on
tube from comp to cond gets hot.

ac condenser fan NOT working, (and it spins freely)
unplugged both rad and ac fan and checked for power at plugs and they were both live.
jumped from the batt to the rad fan and it ran like hell
jumped the ac condenser fan any only a little twitching lol, bad fan. (is that enough to keep the high press gas from condensing, we ran it down the hwy at 70mph, that shoulda cooled it enough, right?, or not?


without gages, I depress the high side Schrader valve atop the fender to check for pressure and I have it.

nothing resembling coolness on the tube entering the firewall to the evaporator

is that the expansion valve with the black 3wire connector pressed over it? could it be plugged?

guess what? the compressor never turns off/cycles, the clutch is engaged and I never hear/see it disengage until I turn off the ac in the cabin, (that shouldn't be).

this man just lost his job and needs to sell both his cars and buy a minivan to move himself/wife/and kid back to CA.

I am afraid to bring it in for a $10 check because there are only a handful of techs like myself left that know how to diagnose a prob, rather than just throw parts at it.

Whatta you guys think?

thx
Jim
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Old 07-08-2014, 01:57 PM   #2 (permalink)
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Default 06 Forenza. IL, USA

Yikes! What a mess huh?

I'll try and break this thing down and give you some feedback though...

Without high and low side pressures, I'm ALMOST at a loss.


Quote:
is that the expansion valve with the black 3wire connector pressed over it? could it be plugged?
I'm use to seeing only a straight mechanical / pressure bulb expansion valve. No wires. Not sure what you are looking at. OH! If connected to a freon line, that is the High / Low pressure switch connection!



Quote:
jumped the ac condenser fan any only a little twitching lol, bad fan.
Is it free to mechanically turn?



Quote:
is that enough to keep the high press gas from condensing, we ran it down the hwy at 70mph, that shoulda cooled it enough, right?
In theory, yes. It would be a better test to engage the compressor AT that speed, rather than initially and build up speed / pressure gradually I guess.



Quote:
guess what? the compressor never turns off
Either someone by-passed (hot-wired) the wiring OR a relay has fused together (closed) contacts, is my thought.
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Old 07-10-2014, 07:22 PM   #3 (permalink)
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no one has any ideas?
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Old 07-14-2014, 10:46 PM   #4 (permalink)
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hi. i dont have any ideas but heres a link to an online service manual. it has wiring diagrams and everything in it. you might find it useful.
Daewoo Service Manual
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Old 07-16-2014, 11:47 AM   #5 (permalink)
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Originally Posted by 7-even View Post
hi. i dont have any ideas but heres a link to an online service manual. it has wiring diagrams and everything in it. you might find it useful.

Thanks for the reply 7
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Old 07-18-2014, 08:09 PM   #6 (permalink)
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no problem. sorry i couldnt be more help
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