Air con has packed up

pletevl · 4th August 2020, 16:19

Hi all,

I left my car for 3 weeks, got in it today and the air conditioning has stopped working. The symbol is up on the screen but it’s not working.

If I put it on T4 will it tell me what’s wrong with it ?

Thanks.

Pete.

suzublu · 4th August 2020, 16:48

Press and hold auto and distribution buttons together & see if any codes come on the display

Yorkshire GOC · 4th August 2020, 17:04

If you get FC 00 then no faults found - a common one is FC 21 FC 22 -solar sensor not working - but this is usually down to running the test in poor light etc.

Yorkshire GOC · 4th August 2020, 17:06

Not sure if the diagnostic will flag this - but assuming your fan is working i would look at the air con blower resistor pack as that can fail - and a relatively cheap fix.

pletevl · 5th August 2020, 07:01

Hi all

which button is the "distribution" button ?

The radiator fan isn't coming on. The heater fan is spinning.

SD1too · 5th August 2020, 08:00

Hi Pete,

Before you do diagnostics on the air distribution system, is the compressor engaging when you start the engine and press the windscreen demist button?

Simon

pletevl · 5th August 2020, 08:21

Simon,

I will try and check it at lunchtime.

When I go from econ to aircon, I don't hear the compressor clicking in. But it is a rattly old diesel so maybe the click is being drowned out by the noise, I do notice an engine speed drop though, but only when I go to "ECON" mode.

Yorkshire GOC · 5th August 2020, 09:29

Quote:

Originally Posted by pletevl

Hi all

which button is the "distribution" button ?

The radiator fan isn't coming on. The heater fan is spinning.

Top row -the sitting man -second from right

Yorkshire GOC · 5th August 2020, 09:33

When you press auto and the "sitting man" turn the key to position 2 and hold until you see the fault code read out - if outside light on the car is poor it likes to throw out an FC 21/22 code re the solar sensors - but if you redo in good light it will normally clear.

COLVERT · 5th August 2020, 11:05

You can see the pulley on the end of the compressor.

Normally the centre of the pulley is stationary.

When you switch on the air con you can see the centre spinning. If it doesn't spin you've found the problem.---

4th August 2020, 16:19	#1
pletevl Posted a thing or two rover 75 cdti(rhd), MG ZR(lhd), MG TF(lhd), MG TF(rhd), mini mpi (lhd), Renault megane III (awful) Join Date: Mar 2014 Location: East of France Posts: 1,282 Thanks: 124 Thanked 114 Times in 93 Posts	Air con has packed up Hi all, I left my car for 3 weeks, got in it today and the air conditioning has stopped working. The symbol is up on the screen but it’s not working. If I put it on T4 will it tell me what’s wrong with it ? Thanks. Pete.

4th August 2020, 17:04	#3
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,066 Thanks: 1,842 Thanked 623 Times in 469 Posts	If you get FC 00 then no faults found - a common one is FC 21 FC 22 -solar sensor not working - but this is usually down to running the test in poor light etc. __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.

4th August 2020, 17:06	#4
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,066 Thanks: 1,842 Thanked 623 Times in 469 Posts	Not sure if the diagnostic will flag this - but assuming your fan is working i would look at the air con blower resistor pack as that can fail - and a relatively cheap fix. __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.

5th August 2020, 08:00	#6
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,375 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Hi Pete, Before you do diagnostics on the air distribution system, is the compressor engaging when you start the engine and press the windscreen demist button? Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

5th August 2020, 09:33	#9
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,066 Thanks: 1,842 Thanked 623 Times in 469 Posts	When you press auto and the "sitting man" turn the key to position 2 and hold until you see the fault code read out - if outside light on the car is poor it likes to throw out an FC 21/22 code re the solar sensors - but if you redo in good light it will normally clear. __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.

4th August 2020, 16:48	#2
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,920 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	Press and hold auto and distribution buttons together & see if any codes come on the display

5th August 2020, 07:01	#5
pletevl Posted a thing or two rover 75 cdti(rhd), MG ZR(lhd), MG TF(lhd), MG TF(rhd), mini mpi (lhd), Renault megane III (awful) Join Date: Mar 2014 Location: East of France Posts: 1,282 Thanks: 124 Thanked 114 Times in 93 Posts	Hi all which button is the "distribution" button ? The radiator fan isn't coming on. The heater fan is spinning.

5th August 2020, 08:21	#7
pletevl Posted a thing or two rover 75 cdti(rhd), MG ZR(lhd), MG TF(lhd), MG TF(rhd), mini mpi (lhd), Renault megane III (awful) Join Date: Mar 2014 Location: East of France Posts: 1,282 Thanks: 124 Thanked 114 Times in 93 Posts	Simon, I will try and check it at lunchtime. When I go from econ to aircon, I don't hear the compressor clicking in. But it is a rattly old diesel so maybe the click is being drowned out by the noise, I do notice an engine speed drop though, but only when I go to "ECON" mode.

5th August 2020, 11:05	#10
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	You can see the pulley on the end of the compressor. Normally the centre of the pulley is stationary. When you switch on the air con you can see the centre spinning. If it doesn't spin you've found the problem.---