2012 Volvo S80 D3 Air Con Issue

Phil Moores · Aug 24th, 2019, 11:37

My air con has not been working correctly for a while. Yesterday in 30 deg heat it wouldn't work at all, just blowing hot air. It wasn't until the temp dropped by 5 deg that it started to work once again.
Today I have been to my garage for a regas. They recovered 779g of refrigerant and recharged it with 801g. Which to my way of thinking was not a great deal. I suspect that that this will not have cured the issue. I would welcome any comments that could indicate another issue which could be causing the problem.
I would add that I have now used an iCarsoft diagnostic tool for Volvo & Saab and it is reading Code B1A6909 Humidity Sensor, General Electrical Failures, Component Failure. Where is the Humidity Sensor located and is this component easy to replace, or is it a garage job with specialised tools etc.

Clan · Aug 24th, 2019, 12:47

Quote:

Originally Posted by Phil Moores

My air con has not been working correctly for a while. Yesterday in 30 deg heat it wouldn't work at all, just blowing hot air. It wasn't until the temp dropped by 5 deg that it started to work once again.
Today I have been to my garage for a regas. They recovered 779g of refrigerant and recharged it with 801g. Which to my way of thinking was not a great deal. I suspect that that this will not have cured the issue. I would welcome any comments that could indicate another issue which could be causing the problem.
I would add that I have now used an iCarsoft diagnostic tool for Volvo & Saab and it is reading Code B1A6909 Humidity Sensor, General Electrical Failures, Component Failure. Where is the Humidity Sensor located and is this component easy to replace, or is it a garage job with specialised tools etc.

does the radiator fan turn on at a slow speed when you turn the AC on ?

Can you see the centre of the pump pulley rotating when you are not getting cold air ?

JoeNinety · Aug 24th, 2019, 13:18

and wrong forum:
S80 '06> / V70 '07> / XC70 '07> General

Phil Moores · Aug 24th, 2019, 14:23

Quote:

Originally Posted by Clan

does the radiator fan turn on at a slow speed when you turn the AC on ?

Can you see the centre of the pump pulley rotating when you are not getting cold air ?

Yes to both questions, radiator fan is rotating at a slow speed and the pump pulley is rotating

cheshired5 · Aug 24th, 2019, 16:02

Quote:

Originally Posted by Phil Moores

the pump pulley is rotating

The pulley will always rotate.
Is the centre clutch plate on the pulley rotating also?

Phil Moores · Aug 25th, 2019, 14:23

Yes it is

Clan · Aug 25th, 2019, 14:26

Quote:

Originally Posted by Phil Moores

Yes it is

so , if the pump is rotating is the thicker of the two AC pipes anywhere under the bonnet cold ?

Phil Moores · Aug 25th, 2019, 17:42

none of the pipes are cold

cheshired5 · Aug 25th, 2019, 18:04

To avoid this thread becoming any more like pulling teeth, just get it hooked up to a proper reader like Dice and Vida.
It will save having to drag out every detail of the issue one question at a time and will instead point to the problem very easily.

Clan · Aug 25th, 2019, 20:38

Quote:

Originally Posted by Phil Moores

none of the pipes are cold

that suggests the most likely thing is lack of gas ... a few possible internal causes as well but highly unlikely in my 40 years of repairing them ..

Aug 24th, 2019, 11:37	#1
Phil Moores New Member Last Online: Aug 31st, 2019 15:45 Join Date: Jul 2018 Location: St Neots	2012 Volvo S80 D3 Air Con Issue My air con has not been working correctly for a while. Yesterday in 30 deg heat it wouldn't work at all, just blowing hot air. It wasn't until the temp dropped by 5 deg that it started to work once again. Today I have been to my garage for a regas. They recovered 779g of refrigerant and recharged it with 801g. Which to my way of thinking was not a great deal. I suspect that that this will not have cured the issue. I would welcome any comments that could indicate another issue which could be causing the problem. I would add that I have now used an iCarsoft diagnostic tool for Volvo & Saab and it is reading Code B1A6909 Humidity Sensor, General Electrical Failures, Component Failure. Where is the Humidity Sensor located and is this component easy to replace, or is it a garage job with specialised tools etc. Last edited by Phil Moores; Aug 24th, 2019 at 12:08.

Aug 24th, 2019, 13:18	#3
JoeNinety Senior Member Last Online: Yesterday 20:59 Join Date: May 2019 Location: Winchester	and wrong forum: S80 '06> / V70 '07> / XC70 '07> General __________________ V70 P2 2006 2.4 Petrol 170bhp Est SE Automatic (5 speed) MG Midget Mk1 1962 Previous: RR TDV8 3.6 '08; RR TD6 3.0 '02; RR P38A V8 '99; Audi A4 Cab 3.0 V6 2004; Volvo 740 GLE Est 1989 Have VIDA & VXDIAG NANO on W10Pro - happy to help

Aug 25th, 2019, 18:04	#9
cheshired5 Premier Member Last Online: Dec 26th, 2021 13:42 Join Date: Dec 2013 Location: Crewe	To avoid this thread becoming any more like pulling teeth, just get it hooked up to a proper reader like Dice and Vida. It will save having to drag out every detail of the issue one question at a time and will instead point to the problem very easily. __________________ 2002 S60 SE D5 Manual 209000 miles

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Aug 25th, 2019, 14:23	#6
Phil Moores New Member Last Online: Aug 31st, 2019 15:45 Join Date: Jul 2018 Location: St Neots	Yes it is

Aug 25th, 2019, 17:42	#8
Phil Moores New Member Last Online: Aug 31st, 2019 15:45 Join Date: Jul 2018 Location: St Neots	none of the pipes are cold

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