Air Con: - AC not working

760Simon · Jun 27th, 2015, 18:37

Hi all
Just a quick question, is the rad fan supposed to run when ac is switched on ?

cheshired5 · Jun 27th, 2015, 18:40

Not just when the just the ac is switched on no.
When the ac is switched on and the compressor is engaged and running too.
Look to see if the compressor pulley and clutch plate are turning together.

760Simon · Jun 27th, 2015, 19:10

Cheshired5 thanks for the info,

The compressor is engaging but the fan is not running so me thinks I have a problem will have to investigate tomorrow hopefully it's not fan. You don't happen to know what the silver box on the fan housing is ? I assume that it a control units ?

Cheers

Brendan W · Jun 27th, 2015, 19:27

What car have you got ?

760Simon · Jun 27th, 2015, 19:52

Brendon,
It's a 2002 S80 2.4 SE auto

Brendan W · Jun 27th, 2015, 20:21

Some cars do put the fan on with the a/c. Mine doesn't.

Coventry · Jun 27th, 2015, 20:25

Does your fan come on with the temp tensor disconnected, Brendan?

Brendan W · Jun 27th, 2015, 20:35

Excellent question. Spitting rain here now. I'll check tomorrow. Come to think of it I can't remember the last time I heard it run. I check it every year on The Fiat, but a Volvo? Nah!

Coventry · Jun 27th, 2015, 20:53

I'm going to check mine tomorrow if I find time. I've only heard the fan run on the Volvo once during my ownership of it. Stupid efficient diesel.

Edit: well worth checking it with the incoming 30+ Celsius this week. I assume you'll be getting the same in the ROI.

oragex · Jun 28th, 2015, 03:08

I believe the fan should be turning at least at slow speed when the A/C compressor is engaging. Reason is, it needs to remove the heat from the A/C evaporator so the refrigerant can cool down. I wonder though if the fan will run right after a start up with a cold engine. Any how, if the A/C blows cold only when the car drives fast, then there might be an issue with the fan controller- the shiny box located on the fan assy. These are known to go bad - two condensers will leak inside. Either replace the controller (cut the wires and solder the new one in place) or the whole fan assy.

Jun 27th, 2015, 18:37	#1
760Simon Getting old disgracefully Last Online: Today 00:15 Join Date: Jan 2009 Location: South Essex	AC not working Hi all Just a quick question, is the rad fan supposed to run when ac is switched on ?

Jun 27th, 2015, 18:40	#2
cheshired5 Premier Member Last Online: Dec 26th, 2021 13:42 Join Date: Dec 2013 Location: Crewe	Not just when the just the ac is switched on no. When the ac is switched on and the compressor is engaged and running too. Look to see if the compressor pulley and clutch plate are turning together. __________________ 2002 S60 SE D5 Manual 209000 miles

Jun 28th, 2015, 03:08	#10
oragex Premier Member Last Online: Jul 26th, 2021 21:24 Join Date: Jun 2013 Location: Coldnada	I believe the fan should be turning at least at slow speed when the A/C compressor is engaging. Reason is, it needs to remove the heat from the A/C evaporator so the refrigerant can cool down. I wonder though if the fan will run right after a start up with a cold engine. Any how, if the A/C blows cold only when the car drives fast, then there might be an issue with the fan controller- the shiny box located on the fan assy. These are known to go bad - two condensers will leak inside. Either replace the controller (cut the wires and solder the new one in place) or the whole fan assy. __________________ Several Volvo Repair Videos https://www.youtube.com/playlist?lis...ECTts0FSVSOT_c

Jun 27th, 2015, 19:10	#3
760Simon Getting old disgracefully Last Online: Today 00:15 Join Date: Jan 2009 Location: South Essex	Cheshired5 thanks for the info, The compressor is engaging but the fan is not running so me thinks I have a problem will have to investigate tomorrow hopefully it's not fan. You don't happen to know what the silver box on the fan housing is ? I assume that it a control units ? Cheers

Jun 27th, 2015, 19:27	#4
Brendan W Premier Member Last Online: Apr 2nd, 2024 19:50 Join Date: Dec 2007 Location: Wexford	What car have you got ?

Jun 27th, 2015, 19:52	#5
760Simon Getting old disgracefully Last Online: Today 00:15 Join Date: Jan 2009 Location: South Essex	Brendon, It's a 2002 S80 2.4 SE auto

Jun 27th, 2015, 20:21	#6
Brendan W Premier Member Last Online: Apr 2nd, 2024 19:50 Join Date: Dec 2007 Location: Wexford	Some cars do put the fan on with the a/c. Mine doesn't.

Jun 27th, 2015, 20:25	#7
Coventry Master Member Last Online: May 17th, 2024 22:00 Join Date: Feb 2011 Location: South Wales	Does your fan come on with the temp tensor disconnected, Brendan?

Jun 27th, 2015, 20:35	#8
Brendan W Premier Member Last Online: Apr 2nd, 2024 19:50 Join Date: Dec 2007 Location: Wexford	Excellent question. Spitting rain here now. I'll check tomorrow. Come to think of it I can't remember the last time I heard it run. I check it every year on The Fiat, but a Volvo? Nah!

Jun 27th, 2015, 20:53	#9
Coventry Master Member Last Online: May 17th, 2024 22:00 Join Date: Feb 2011 Location: South Wales	I'm going to check mine tomorrow if I find time. I've only heard the fan run on the Volvo once during my ownership of it. Stupid efficient diesel. Edit: well worth checking it with the incoming 30+ Celsius this week. I assume you'll be getting the same in the ROI.

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