air con
Thread Starter
Advanced
Joined: Mar 2008
Posts: 89
Likes: 0
From: Hong Kong
air con
please share any cost effective means to make the air-con cooler?
I checked this is not leakage on the coolant.
some suggest better coolant, but seems there is hardly any brands or standard for coolant.
I am thinking of tinting from front windshield as well to reduce the sunlight intake... all others windows has been done.
I checked this is not leakage on the coolant.
some suggest better coolant, but seems there is hardly any brands or standard for coolant.
I am thinking of tinting from front windshield as well to reduce the sunlight intake... all others windows has been done.
Nordschleife Master
Joined: Sep 2002
Posts: 6,509
Likes: 4
Henry - Not sure if this is your first air-cooled P-car but in general the A/C in these cars does not compare at all to more modern cars...but they are still a huge improvement vs. P-cars from the '70s and '80s. My MY94 993 (which is also in HK) started to lose effectiveness of the A/C 5-6 years ago despite having the freon recharged/replaced, etc and eventually I had the whole system redone...wasn't cheap but really was the only way to go to get effective A/C.
Rennlist Member
Joined: May 2009
Posts: 633
Likes: 1
From: Paradise Valley, Arizona
Check the pollen filter. When the air conditioning in the 993 is totally up to top operating condition it cools extraordinarily well. I should know after 115 degree days. An AZ Rennlist 993 member bought a 997 recently because he felt his 993 AC wasn't getting the job done. When the system was properly serviced before selling it he found he could have kept the 993 and have been perfectly comfortable even in this heat.
Last edited by skywachr; Aug 26, 2009 at 03:24 AM.
Instructor
Joined: Apr 2007
Posts: 165
Likes: 0
From: Taiwan
If your car is a 993, check the electro circuit that controls the high and low of your air con's cooling fan. Fan is located at the front at the right hand side. When something is wrong with the electro circuit, the fan either cannot be turned on at all, or it can only run low and never high, resulting in air con never cold enough for your HK sun at noon time in July.
Instructor
Joined: Apr 2007
Posts: 165
Likes: 0
From: Taiwan
If your car is a 993, check the electro circuit that controls the high and low of your air con's cooling fan. Fan is located at the front at the right hand side. When something is wrong with the electro circuit, the fan either cannot be turned on at all, or it can only run low and never high, resulting in air con never cold enough for your HK sun at noon time in July.
Three Wheelin'
Joined: Oct 2006
Posts: 1,394
Likes: 3
From: Tampa, FL
Henry,
Have the same wish as you here in central Florida. Have also seen in numerous advertisements for new compressors (in Vertex for example) that they have more cooling power than the old ones.
Does anyone out there know if this is true? I thought one possibility is that the compressors are more efficient because they are rotary, but maybe that's a general statement for most old Porsches and ours already have rotary compressors.
dave
Have the same wish as you here in central Florida. Have also seen in numerous advertisements for new compressors (in Vertex for example) that they have more cooling power than the old ones.
Does anyone out there know if this is true? I thought one possibility is that the compressors are more efficient because they are rotary, but maybe that's a general statement for most old Porsches and ours already have rotary compressors.
dave
Trending Topics
Thread Starter
Advanced
Joined: Mar 2008
Posts: 89
Likes: 0
From: Hong Kong
If your car is a 993, check the electro circuit that controls the high and low of your air con's cooling fan. Fan is located at the front at the right hand side. When something is wrong with the electro circuit, the fan either cannot be turned on at all, or it can only run low and never high, resulting in air con never cold enough for your HK sun at noon time in July.
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look
Verdad Gallardo
10 Porsche Colors That Have More Personality Than Most People
Verdad Gallardo
Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod
Verdad Gallardo
10 Reasons I Hate Going to the Porsche Dealership (& the 1 Reason I Stay)
Joe Kucinski
Porsche Shakes Up The Nürburgring Lap Record Table Once Again
Verdad Gallardo
6 Ways the Porsche 911 GT3 S/C Redefines Performance
Joe Kucinski
10 Wildest Homologation Specials Porsche Ever Sold
Verdad Gallardo
Super Rare RUF BTR III Comes Out of Hibernation, Looking For a New Home
Verdad Gallardo
10 Porsche Opinions That Can Start a Fight
Joe Kucinski
Rennlist Member
Joined: Apr 2004
Posts: 2,567
Likes: 536
From: Oslo, Norway
First rule of 993 A/C gremlin search is to have the system checked for leaks or refilled. Then, check the temperature of the airstream, it should be indside the specification. You can see some charts a bit down on the page here:
http://www.p-car.com/diy/ac/
If the air is too hot you may have the very common electrical servo failiure on the heat vents. That's another story, do a search on this forum for more info.
Regards,
Tore
http://www.p-car.com/diy/ac/
If the air is too hot you may have the very common electrical servo failiure on the heat vents. That's another story, do a search on this forum for more info.
Regards,
Tore
Rennlist Member
Joined: Aug 2006
Posts: 3,078
Likes: 42
From: Hurley, NY
Addict
Rennlist
Lifetime Member
Rennlist
Lifetime Member
Joined: Jul 2001
Posts: 1,157
Likes: 3
From: Miramar Beach, Florida
I keep one of those little instant read thermometers in the central vent of all my cars. I notice that the air coming out on the 993 is never lower than 40 degrees, while the 997 is a bit colder and the 525i and the 350E get down in the low 30s. It would appear that Porsche set the temp too high perhaps there was a problem with icing up of the evaporator coil.
Perhaps someone knows of a replacement expansion valve/temp sensor that would rectify this. The alternative is just to run the inside fan on high to extract the most heat out of the car. Personally, it gets too noisy for me to do this for very long, but it helps a lot.
Perhaps someone knows of a replacement expansion valve/temp sensor that would rectify this. The alternative is just to run the inside fan on high to extract the most heat out of the car. Personally, it gets too noisy for me to do this for very long, but it helps a lot.
Rennlist Member
Joined: Apr 2004
Posts: 2,567
Likes: 536
From: Oslo, Norway
By the way, tctung is partially wrong, the condenser fan is in the left front wing.
But he's righth about the electric circuit, there's a serial resistor for low fan speed that frequently fail on our cars. It's placed on the condenser frame inside the front wing.
A faulty resistor force the CCU to run the condenser fan intermittently at high speed to keep up. This condition also may cause excess pressure in the A/C coolant. I assume that this may also affect air temperature inside the car.
The resistor is easily tested shorting the control relay for the circuit.
There's a similar resistor on the oil cooler fan in the rigth front wing with the same tendency to fail...
Both topics are frequently discussed in this forum.
Regards,
Tore
But he's righth about the electric circuit, there's a serial resistor for low fan speed that frequently fail on our cars. It's placed on the condenser frame inside the front wing.
A faulty resistor force the CCU to run the condenser fan intermittently at high speed to keep up. This condition also may cause excess pressure in the A/C coolant. I assume that this may also affect air temperature inside the car.
The resistor is easily tested shorting the control relay for the circuit.
There's a similar resistor on the oil cooler fan in the rigth front wing with the same tendency to fail...
Both topics are frequently discussed in this forum.
Regards,
Tore
