AIRCON
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AIRCON
Im from Australia and where I park during the day at work there is no shade and my car gets very very hot even with the windows down an inch. My aircon on 25 degrees c+ days only blows out hotish/outside temp air. At times inside my car would be over 50 degrees c and it is at the stage where it is unbearable and is making me think of getting a jap car instead of spending money doing power modifications. But every time I drive my car in the morning I dont want to get another car because I know I would have buyers remorse.
Any way how much would it cost to get my aircon working which will make my car in a pleasant cool condition. Also if your thinking my engine is overheating I have had aftermarket fans installed on my car when my stock fan broke and it actually cools the car down very well compared to what it did before. The car never gets over half way on the temp gauge.
Any way how much would it cost to get my aircon working which will make my car in a pleasant cool condition. Also if your thinking my engine is overheating I have had aftermarket fans installed on my car when my stock fan broke and it actually cools the car down very well compared to what it did before. The car never gets over half way on the temp gauge.
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Joined: Sep 2003
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From: Roskilde, Denmark
I have the same problem 
i have changed the hot water valve, but that didn't work, i think i have a vaccume problem...
You could close the hotwater vale manually with a plastic strip, bet then you have no heat
Mads
i have changed the hot water valve, but that didn't work, i think i have a vaccume problem... You could close the hotwater vale manually with a plastic strip, bet then you have no heat
Mads
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From: SF Bay Area, CA
Nobody will be able to give you a cost estimate before the root of the problem has been diagnozed. There are many potential reasons why a 928 AC might not work - some are easy to fix, some are more involved.
One of the first thigns I would check is whether the heater valve moves when you start the engine and the AC is set to all cold. If it does not move, you have a vacuum issue that you need to trace.
Any AC shop can determine, if there is enough freon in your system, and if it's tight. If it isn't and you have not run the AC for a while, be prepared for lots of dried out seals and consequently lots of $$$. An AC system MUST be run regularly - not doing so costs more than running it. Mine runs everytime I drive.
One of the first thigns I would check is whether the heater valve moves when you start the engine and the AC is set to all cold. If it does not move, you have a vacuum issue that you need to trace.
Any AC shop can determine, if there is enough freon in your system, and if it's tight. If it isn't and you have not run the AC for a while, be prepared for lots of dried out seals and consequently lots of $$$. An AC system MUST be run regularly - not doing so costs more than running it. Mine runs everytime I drive.
Last edited by Nicole; Feb 15, 2007 at 06:14 PM.
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Joined: Jan 2003
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From: Double Oak, TX
Start by reading this excellent document written by the Master himself.
Go to the web page below.
Look for Tip & Links in the menu on the left.
Find Wally's World and then find HVAC.
https://www.928gt.com/default1.htm
Once you have digested all the info put it to practise and find out what is going on with your system.
Good luck
Go to the web page below.
Look for Tip & Links in the menu on the left.
Find Wally's World and then find HVAC.
https://www.928gt.com/default1.htm
Once you have digested all the info put it to practise and find out what is going on with your system.
Good luck
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Rest in Peace
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From: Bird lover in Sharpsburg
Originally Posted by Nicole
Nobody will be able to give you a cost estimate before the root of the problem has been diagnosed.
I had one man last week want me to listen over the phone to his car so I could give him a quote on how much it would be.
It drives me nuts when they say "All you have to do is hook it up to that box that tells you whats wrong with it".
I could make a fortune if I had a magic box like that.
About your A/C problem, she is right on the money.
It could be cheap and easy, or hard and $$
Pro
Joined: Feb 2006
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From: Australia
UNTS1, Ask this same question on the Landsharkoz website, giving your location and model year, and without a doubt you'll get some excellant help. If you're not registered on that free site, send me a PM and I'll email you the site moderator's email address so you can register. HTH, Dave, Dubai
Burning Brakes
Joined: May 2001
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I think you have just asked the question "how long is a piece of string".
To allow us to assist you we need to know the yearmodel etc.
There can be four basic problems with your system, the airconditioning system (R12 or 134A), the heating system, the vacuum and electrically controlled part of your HVAC. In reality it is quite a complicated piece of kit.
I have just fully inspected my HVAC system, checked all systems for correct function, checked all vacuum operated controllers, check setting motor, cleaned the evaportator surface, the blower fan, checked and overhauled the small fan for the internal temperature sensor, checked the sensor resistance and I still have a couple of jobs to do, such as the resistance measurement of the external temperature sensor and the defrost controller. The WSM give an excellent guide for checking the operation of the system.
I located two vacuum controllers malfunctioning, the centre vent microswitch closed circuited (repaired with instant technician WD40), the setting motor and heater control flaps need adjustment.
What a difference it made to the system with a cleaned evaporator. The face of the evaporator was completely covered with muck that I was able to carefully brush off.
I now have a fully functioning HVAC system except that I need to change the R12 to 134A as unable to obtain top up R12. The refrigerant system is a little down on gas, but drove the car in 35 degrees C yesterday and system performed as designed, however, if car was left in hot sun it would take a fully functioning refrigerant system to pump out the heat.
Tails 1990 928 S4 Auto
To allow us to assist you we need to know the yearmodel etc.
There can be four basic problems with your system, the airconditioning system (R12 or 134A), the heating system, the vacuum and electrically controlled part of your HVAC. In reality it is quite a complicated piece of kit.
I have just fully inspected my HVAC system, checked all systems for correct function, checked all vacuum operated controllers, check setting motor, cleaned the evaportator surface, the blower fan, checked and overhauled the small fan for the internal temperature sensor, checked the sensor resistance and I still have a couple of jobs to do, such as the resistance measurement of the external temperature sensor and the defrost controller. The WSM give an excellent guide for checking the operation of the system.
I located two vacuum controllers malfunctioning, the centre vent microswitch closed circuited (repaired with instant technician WD40), the setting motor and heater control flaps need adjustment.
What a difference it made to the system with a cleaned evaporator. The face of the evaporator was completely covered with muck that I was able to carefully brush off.
I now have a fully functioning HVAC system except that I need to change the R12 to 134A as unable to obtain top up R12. The refrigerant system is a little down on gas, but drove the car in 35 degrees C yesterday and system performed as designed, however, if car was left in hot sun it would take a fully functioning refrigerant system to pump out the heat.
Tails 1990 928 S4 Auto
