rover 75 aircon not working at all

craig8661 · 23rd August 2011, 13:36

just wondering helens tourer the aircon is not working.

it has the climet pack.

i can feel the relay click on the underbonet fuse box.
fan dont kick in
also the compresser dont kick in

anouther fault that i think is unrelated is the electric mirrors dont work.

what areas can i test i have volt meter etc.
think its still gassed etc

soapy · 23rd August 2011, 14:15

Quote:

Originally Posted by craig8661

just wondering helens tourer the aircon is not working.

it has the climet pack.

i can feel the relay click on the underbonet fuse box.
fan dont kick in
also the compresser dont kick in

anouther fault that i think is unrelated is the electric mirrors dont work.

what areas can i test i have volt meter etc.
think its still gassed etc

Did the same test on the relay on my previous 75 Craig and it was the 3 speed fan that had gone luckily though it was covered on warranty.

SD1too · 23rd August 2011, 15:13

Quote:

Originally Posted by craig8661

fan dont kick in
also the compresser dont kick in

I'd say you've lost all or a large amount of your refrigerant. Call out a mobile air con. specialist who will attach gauges to measure the pressures.

Quote:

Originally Posted by soapy

... it was the 3 speed fan that had gone ...

A failed fan motor won't disable the compressor.

Simon.

e668ecp · 23rd August 2011, 16:11

If it has lost the air con gas then you have a leak. Do not just regas it as it will go again.

James.uk · 23rd August 2011, 16:24

Irish aircons rarely work in the summer...

...

Telferstr · 23rd August 2011, 16:26

Hi,
I believe that if the Cooling Fan for the radiator fails to operate, this may affect the operation of the air conditioning compressor.
First thing to do is to get the Cooling Fan operating as it should, as this is a must anyway, then if the A/C still does not operate then a number of things follow on. There maybe a problem with the compressors clutch operation, low refrigerant level etc. Would suggest that you get the fan working first, then take it from there.
Regards,
Telfer.

SD1too · 23rd August 2011, 17:20

Quote:

Originally Posted by Telferstr

Hi,
I believe that if the Cooling Fan for the radiator fails to operate, this may affect the operation of the air conditioning compressor.

It doesn't directly affect the compressor but since the condenser isn't receiving the forced air flow it will result in insufficient cooling when the car is stationary or moving slowly. The OP hasn't said whether or not this is happening.

Quote:

There maybe a problem with the compressor's clutch operation ....

That's true but not something I have come across before. When the refrigerant is missing the low pressure trinary switch will tell the ECU not to engage the compressor clutch, and this is what I think is most likely to be happening hence my advice.

Simon.

craig8661 · 23rd August 2011, 17:22

Quote:

Originally Posted by Telferstr

Hi,
I believe that if the Cooling Fan for the radiator fails to operate, this may affect the operation of the air conditioning compressor.
First thing to do is to get the Cooling Fan operating as it should, as this is a must anyway, then if the A/C still does not operate then a number of things follow on. There maybe a problem with the compressors clutch operation, low refrigerant level etc. Would suggest that you get the fan working first, then take it from there.
Regards,
Telfer.

my other tourer the fan had failed yet the compreser and air con was working.

i will get the pressure checked on the system there is still a good pressure in there as i taped one of the valves to see if it was still gassed.

one other thing i need to do is pull the under tray of it and see if it has the belt on as some one may have removed it to cure the wosshing noise these can suffer from when the fan dont work

craig8661 · 23rd August 2011, 17:24

Quote:

Originally Posted by SD1too

It doesn't directly affect the compressor but since the condenser isn't receiving the forced air flow it will result in insufficient cooling when the car is stationary or moving slowly. The OP hasn't said whether or not this is happening.

That's true but not something I have come across before. When the refrigerant is missing the low pressure trinary switch will tell the ECU not to engage the compressor clutch, and this is what I think is most likely to be happening hence my advice.

Simon.

i think the same the trinery switch is preventing it firing up for safty of low pressure.

i have no engagement of the compresser at all not tested to see if its getting a live when the switch is pressed for aircon yet tho

chrissyboy · 23rd August 2011, 18:57

Quote:

Originally Posted by craig8661

i think the same the trinery switch is preventing it firing up for safty of low pressure.

i have no engagement of the compresser at all not tested to see if its getting a live when the switch is pressed for aircon yet tho

i agree with SD1too, the prssure switch isnt sensing any pressure so the clutch will not be allowed to engage ... you have very little gas in the system .. leak? or previous owners neglect only way is to get it to someone to take out any gas left in the system and pressure test it and refill to the recommended amount.

23rd August 2011, 13:36	#1
craig8661 Posted a thing or two rover 75 tourer cdt Join Date: Feb 2011 Location: Chesterfield Posts: 1,924 Thanks: 3 Thanked 4 Times in 4 Posts	rover 75 aircon not working at all just wondering helens tourer the aircon is not working. it has the climet pack. i can feel the relay click on the underbonet fuse box. fan dont kick in also the compresser dont kick in anouther fault that i think is unrelated is the electric mirrors dont work. what areas can i test i have volt meter etc. think its still gassed etc __________________ http://i984.photobucket.com/albums/a...y%20se/sig.jpg spoilt as i own a cdt auto connoisseur se cdt auto member 829 mods so far synergy 2 heated washer jets cant really add anything else as it has it all lol

23rd August 2011, 16:11	#4
e668ecp I really should get out more....... Range Rover Evoque and ZT V8 SE Join Date: Feb 2007 Location: Yorkshire Posts: 2,232 Thanks: 20 Thanked 37 Times in 34 Posts	If it has lost the air con gas then you have a leak. Do not just regas it as it will go again.

23rd August 2011, 16:24	#5
James.uk Passed Away 2002 Pale Blue. Rover 75 CDTi Connoisseur auto. 170K miles Join Date: Dec 2008 Location: Near the M67. Posts: 14,509 Thanks: 199 Thanked 585 Times in 397 Posts	Irish aircons rarely work in the summer... ...

23rd August 2011, 16:26	#6
Telferstr Posted a thing or two Mitsubishi Eclipse Cross 3. 1.5 Petrol 6 Speed Manual Gearbox. Great fan of the Mk1 75 which I had 3 Join Date: Feb 2007 Location: Inverkip, Scotland. Posts: 1,223 Thanks: 23 Thanked 68 Times in 44 Posts	Hi, I believe that if the Cooling Fan for the radiator fails to operate, this may affect the operation of the air conditioning compressor. First thing to do is to get the Cooling Fan operating as it should, as this is a must anyway, then if the A/C still does not operate then a number of things follow on. There maybe a problem with the compressors clutch operation, low refrigerant level etc. Would suggest that you get the fan working first, then take it from there. Regards, Telfer.