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Author Topic: Air Con Woes  (Read 4446 times)

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Andy B

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Re: Air Con Woes
« Reply #15 on: 04 July 2010, 13:49:55 »

Quote
....coupled with a warm top ac pipe you are either undercharged (ac gaswise or you have a blockage in the ac system.

and mine has just been re-gassed about 3 weeks ago  :-/
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capoMV6

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Re: Air Con Woes
« Reply #16 on: 04 July 2010, 14:46:11 »

I think you have blocked expansion valves. HTH
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duggs

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Re: Air Con Woes
« Reply #17 on: 04 July 2010, 14:56:30 »

How do we go about checking/un-blocking said expansion valves please ?
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Cliffo B

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Re: Air Con Woes
« Reply #18 on: 04 July 2010, 15:51:13 »

 after nearly 2 months of trying 5 days ago I finally seem to have solved my air con problems, with to my mind, costly lessons learned.Firstly there seems to be a large part of the motor industry appears to think invest in regassing equipment have motorists come along regass their systems, then when there is some sort of fault, reclaim back the gas(its a legal requirement they do so)and still charge.I just could not get a reasonable diagnosis of what was wrong. In fact the 1st time I had it regassed when I got into the driving seat the car interior was bitterly cold Next day it simply wouldn't work, when I returned to ask what could be wrong. It could be this- It could be that, and when I wouldn't leave miggy to their tender mercy, they degassed the system telling me to return when I had had the system put right. I then went to a garage advertising to be an air con specialist.They allegedly regassed the system and reported a blockage somewhere in the  system. Again no definite diagnosis or quote, finished up as another degass.By now desperation had set in and I remembered a few years back I rebuilt an insurance write off 16v ecotec Cav for myself with bad frontal damage And a firm called Sewells of Leeds rebuilt the air con system with great success.Sewells are true tec experts doing all aspects of motors inc buses and HGV tachographs so I thought it might cost me an arm and a leg but my problem had a good chance of being sorted. I asked them 1st to diagnose what the problem was, a couple of hours later they told me the gas inlet system valve was faulty and recommended the valve and  pipe that carried it be replaced at a cost of £120.00,So I agreed got a price, paid their invoice in full, and then oh dear should have known had to wait a further month for the part to come from Germany,To digress, a few months back I ordered this super HP laptop I'm useing direct as I remember from Mephis USA,2 days later I was takeing delivery at my front door,and what's more was able to track it's progress.The conclusion Ive come to is if possible make the person or firm responsible for putting the system 100% right,and as is the form with most other jobs give a quote for doing so.This way you may be able to diy it (after 1st getting it degassed with an under takeing to regas)Of course I'm now makeing it my business to get to know as much as I can about the science of air con in cars. I am amazed that so little is known especially on the Forum.Well as promised in a previous post, there is my experience of present air con in cars.Hope it helps others avoid my mistakes when remedial action is required. Another thing may help I've been told that a lot of problems can be avoided by working the air con for a short period once a month every month,even in winter months.      
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Cliffo B

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Re: Air Con Woes
« Reply #19 on: 04 July 2010, 16:44:07 »

this possible blockage fault was one of the possible faults I was given,on investigation its located somewhere behind the glove box,and I picked up this explanation of it on the internet I quote,Somewhat of a nozzle to drop pressure of refrigerent liquid. Meter its flow and atomize it.I considered stripping out my system to find the diagnosed blockage but knew from my experience that your dealing with alluminium pipes and nuts and special O ring seals and when I enquired about the 2nd hand parts availability was told their chopped and discarded by the breakers. Take note all you expert breakers on the forum, these parts cost an arm and a leg thats when you can get them. As it turned out in my case it was'nt a blockage unless it was in the gas inlet valve,So had I gone ahead and started stripping my mind cringes at the problems I could have met up with.As already mentioned I found a wealth of info on the Internet I'll try and find this and post back
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Cliffo B

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Re: Air Con Woes
« Reply #20 on: 04 July 2010, 17:03:02 »

as promised,what I did was Google "car air conditioning problems" and really did learn a lot :y :y
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mrjimbo

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Re: Air Con Woes
« Reply #21 on: 04 July 2010, 19:02:57 »

Where abouts is the expansion valve located ?

Is it easy to get at ?
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RobG

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Re: Air Con Woes
« Reply #22 on: 04 July 2010, 19:23:16 »

Glovebox out, blower motor out,undo refrigerant lines at bulkhead, unbolt solenoid valves from evaporator, six screws to remove evap. cover, unbolt retaining plate, disconnect refrigerant lines, unbolt exp. valve from the evap. Not as easy as it sounds.
« Last Edit: 04 July 2010, 19:23:53 by RobG »
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Andy B

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Re: Air Con Woes
« Reply #23 on: 04 July 2010, 19:32:26 »

Quote
Glovebox out, blower motor out,undo refrigerant lines at bulkhead, unbolt solenoid valves from evaporator, six screws to remove evap. cover, unbolt retaining plate, disconnect refrigerant lines, unbolt exp. valve from the evap. Not as easy as it sounds.

it doesn't even sound easy!  :-?  ;D  ;D
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mrjimbo

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Re: Air Con Woes
« Reply #24 on: 04 July 2010, 20:01:18 »

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Glovebox out, blower motor out,undo refrigerant lines at bulkhead, unbolt solenoid valves from evaporator, six screws to remove evap. cover, unbolt retaining plate, disconnect refrigerant lines, unbolt exp. valve from the evap. Not as easy as it sounds.


Assuming that everything goes OK how long does it take to change the expasion valve ?
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RobG

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Re: Air Con Woes
« Reply #25 on: 04 July 2010, 20:07:42 »

Glovebox out is 10mins, blower motor is the pain, unclipping all the wiring harness & moving the airducts, then you have three torx screws, 2 you can see and get at, the 3rd is at the top virtually inaccessible.. Once you`ve removed that the rest is plain sailing. Difficult to factor a time. You may be lucky and get the blower assembly out in 20mins or conversely you could be struggling for a good couple of hours
« Last Edit: 04 July 2010, 20:08:13 by RobG »
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mrjimbo

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Re: Air Con Woes
« Reply #26 on: 04 July 2010, 20:12:41 »

So if i said 4 or 5 hours from start to finish is that sounding about right ?
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RobG

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Re: Air Con Woes
« Reply #27 on: 04 July 2010, 20:15:02 »

Shouldn`t be any longer. As said, if you`re lucky with the blower motor about 2-3hrs start to finish
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mrjimbo

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Re: Air Con Woes
« Reply #28 on: 04 July 2010, 20:21:32 »

Looks like that might be my job for Friday or Saturday. Got to take it to the aircon man on Thursday morning and i got a sneaky feeling after looking at the replies here he going to say "Expansion valve be FUBAR'd" hope it ain't  :y
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RobG

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Re: Air Con Woes
« Reply #29 on: 04 July 2010, 20:26:59 »

Fingers crossed for you matey :y
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