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  Soarer Central * Air Conditioning and Climate Control * Frosted pipe. Is this normal? Previous Previous    Next Next  

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John Khanh
TryHard
NSW
UZZ31

Posts: 355
Reg: 03-2007

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Wednesday, October 01, 2008 - 08:27 pm, by:  John Khanh (Bigjohn) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Guys,

Had my aircon running today as it was quite warm. Popped the bonnet when I got home to clean out the leaves from the base of the windscreen when I happened to noticed one of my aircon pipes completely white & frosted like the inside of a freezer.

See the attached pictures.

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The pipe you can see is actually white, not grey/silver like the others you can see near it.

Is this normal? Should I insulate it?
Dave Rose
TryHard
wa
uzz31 v8

Posts: 491
Reg: 03-2007

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Wednesday, October 01, 2008 - 10:02 pm, by:  Dave Rose (Sand_groper) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Yes its normal.....I did insulate mine
Earl Digby
TryHard
WA
1995 GT-L 4.0 V8

Posts: 103
Reg: 02-2007

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Tuesday, October 11, 2011 - 08:41 pm, by:  Earl Digby (Dukezone) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I know this post was some time ago but I found this on my car and I believe this is abnormal. It follows a weird situation where I dropped a lot of clear fluid /water from somewhere - I thought it as from my radiator. My top tank was low so I topped it up with distilled water but I am not convinced it was that. Anyway just then I noted this as pictured above, not seen this before. But where the metal pipe joins the rubber hose it seems to be leaking. I think that is what is causing the metal pipe to over cool. Any suggestions or ideas???
Dave Rose
Goo Roo
wa
uzz31 v8

Posts: 1705
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Tuesday, October 11, 2011 - 10:25 pm, by:  Dave Rose (Sand_groper) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Its all normal, the water was from the air con drain pipe ,right hand side rear of sub frame.
Frosted pipe is how it should be.
Boris Siljanoski
Goo Roo
Western Australia
LS400 + Soarer.

Posts: 1546
Reg: 11-2007

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Tuesday, October 11, 2011 - 11:14 pm, by:  Boris Siljanoski (Z2tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

At least you know your A/C is performing damn good.
Earl Digby
TryHard
WA
1995 GT-L 4.0 V8

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Wednesday, November 09, 2011 - 07:53 pm, by:  Earl Digby (Dukezone) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Just an update I am now searching all threads for info on Air Conditioner climate control or thermostat working intermittently, I have been experiencing situations where the air con takes its time to heat and seems to blow only very cold air as if on low temp setting. I reckon its related to John Khanh's original post and my later reply.
Matthew Smith
Tinkerer
WA
vvti turbo

Posts: 68
Reg: 06-2011

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Thursday, November 10, 2011 - 07:20 pm, by:  Matthew Smith (Alien_racing) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

when the pipe frosts up like that your aircond is working damn good and the out side climate is warm/hot and humid. And yes the clear fluid you lost from your car comes from your evaporator unit built into your climate control unit and it is just condensation that builds up on the core. It is not something you need to top up. As the system operates it pumps liquid gas (R134a) from your condenser infront of your radiator, into the evaporator unit inside your cabin. the frosted pipe that you see in the pictures is the pipe returning from your evaporator through your TX valve (which meters the amount of liquid gas through the unit) and back into the pump. If you had of touched the other pipe coming from your a/c compressor it would be so hot it would burn you. As for your issue with the temperature control, i have read that this is a problem often caused by installers working in and around your dash. The little grill between your steering wheel and the centre console contains an in cabin temp sensor and when this becomes unpluged it cannot monitor the temp so it will only get cold on max cool
Earl Digby
TryHard
WA
1995 GT-L 4.0 V8

Posts: 107
Reg: 02-2007

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Wednesday, November 16, 2011 - 03:28 pm, by:  Earl Digby (Dukezone) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Matthew Smith wrote on Thursday, November 10, 2011 - 07:20 pm:

As for your issue with the temperature control, i have read that this is a problem often caused by installers working in and around your dash. The little grill between your steering wheel and the centre console contains an in cabin temp sensor and when this becomes unpluged it cannot monitor the temp so it will only get cold on max cool




Thank you for the great info post here Matthew. I always thought the grill was the warning bell or reverse alert speaker. Temp sensor most likely dislodged by yours truly's heavy hands..
Alexander Green
Tinkerer
QLD
Soarer Jzz30 GT-TL

Posts: 20
Reg: 03-2012

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Tuesday, October 02, 2012 - 06:56 pm, by:  Alexander Green (Greeno) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

digging up an old thread here but, i need help....i just put a new denso compressor in the soarer and gassed it, the compressor clutch does not cut in and out like it should, it just remains engaged, causing the frosted low pressure pipe like the above pic. It seems like the thermostat on the evaporator under the dash is not working (at a guess) as it should reach just above 0 degrees then cut the compressor out till it warms up a bit....is this a common problem??
Joe Trojan
Tinkerer
NSW
1992 GT-TL

Posts: 83
Reg: 12-2012

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Tuesday, September 24, 2013 - 12:13 pm, by:  Joe Trojan (Jttt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Bump. Mine is frosting up too after a regas today. AC tech said the compressor should disengage before the pipe frosts up, regardless of how cold the AC control is set, it is not normal as it overloads the compressor, will wear it out quicker, and in extreme conditions will cause failure. He told me it is probably the AC thermostat that needs replacement. With a temp gauge in an air vent the compressor should disengage by 5deg C.

I'm thinking this might have been the cause of the old compressor I removed being noisey.
Boris Siljanoski
Goo Roo
Western Australia
LS400 + Soarer.

Posts: 2106
Reg: 11-2007

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Tuesday, September 24, 2013 - 10:15 pm, by:  Boris Siljanoski (Z2tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

It doesn't overload the compressor, when the low side pipe is very cold the compressor is actually running at least load.

Soarers do not have a thermostat, so they constantly run their compressors, evaporator temperature is regulated by the EPR Valve near the firewall, which stops the pressure in the evaporator falling below a certain point, limiting the temperature and controlling vent temp.
Joe Trojan
Tinkerer
NSW
1992 GT-TL

Posts: 85
Reg: 12-2012

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Wednesday, September 25, 2013 - 03:20 pm, by:  Joe Trojan (Jttt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

OK thanks for that info. The tech was alarmed but I guess he didn't realise that Soarers run the compressor non-stop no matter what.

I've been monitoring things pretty closely since the re-gas yesterday. Now what's interesting is I've only seen the pipe frost up with the fan on low. I'm yet to pop the bonnet for a look with the fan on 2 or more and see a frosted pipe.

There is a thermistor located after the evaporator, anyone know what it's function is?
Boris Siljanoski
Goo Roo
Western Australia
LS400 + Soarer.

Posts: 2107
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Wednesday, September 25, 2013 - 08:37 pm, by:  Boris Siljanoski (Z2tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

The pipe will be at a lower temperature with lower load, when the interior fan is at low speed, there is less heat transfer from the evaporator to the ambient air, so the low side pipe will get colder.

The Thermistor is part of the climate control system, it sends info on the temperature of the incoming air so the system can modulate the doors correctly to provide the required cabin temperature.

Some cars use this same thermistor to cycle the compressor aswell.
Joe Trojan
Tinkerer
NSW
1992 GT-TL

Posts: 92
Reg: 12-2012

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Thursday, September 26, 2013 - 02:58 pm, by:  Joe Trojan (Jttt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I've since popped the bonnet with the fan on 2 to be greeted with a frosted up pipe a couple of times. That tech guy really had me worried about it but you've put me at ease Boris, thanks again!
Christopher Carr
Newbie
New South Wales
v8

Posts: 1
Reg: 01-2016

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Wednesday, February 03, 2016 - 04:10 pm, by:  Christopher Carr (Chumby) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

hi i lust want to be sure that the soarer compressor dose not cycle and the the compressor runs constantly
Dave Rose
Goo Roo
wa
UZZ31 /Pajero sport

Posts: 2681
Reg: 03-2007

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Thursday, February 04, 2016 - 09:35 am, by:  Dave Rose (Sand_groper) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Does not cycle no worries. cheers DR

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