Air conditioning not working

Russp · 12th May 2019, 16:50

I've recently had the aircon regassed but it doesn't seem to be cooling now.
The compressor was a bit noisey but it seems to have got quieter.
The car is a diesel, there doesn't appear to be any fan running under the bonnet when the air-conditioning is on is this normal?
Cheers

Russp · 12th May 2019, 17:28

The fan is definitely not running.
Checked fuse and relay both ok

Mike Trident · 12th May 2019, 17:56

Do you have the original old silver resister still fitted?

Visible through the radiator grill.

Russp · 12th May 2019, 18:11

If that is the circular object with wires in it in the OS lower part of the grille , yes

suffolk boy · 12th May 2019, 18:22

Quote:

Originally Posted by Russp

If that is the circular object with wires in it in the OS lower part of the grille , yes

the chances the resistor has blown you need to change for the so called gold resistor.no not attempt to run the air con until the fan is fixed

Russp · 12th May 2019, 18:31

I've been searching resistors, but there seems to be two and three speed versions how do I tell ?
I don't think the object I saw I'd a resistor as it says its at two o'clock on the fan but I can't see anything there

suzublu · 12th May 2019, 19:26

Quote:

Originally Posted by Russp

I've been searching resistors, but there seems to be two and three speed versions how do I tell ?
I don't think the object I saw I'd a resistor as it says its at two o'clock on the fan but I can't see anything there

Have a read

https://the75andztclub.co.uk/forum/s...ad.php?t=68336

Russp · 12th May 2019, 19:30

Just been browsing net and found a site which said run engine and switch on rapid demist and fan should run at high speed and if it doesn't system needs regassing.
If this is correct where is the most common place for leaks? The compressor has been quite noisey recently especially when kicking in on auto mode.
Is it worth changing this and the condenser or does that require the cooling system to be drained ?

suzublu · 12th May 2019, 19:41

If you don't have a resistor fitted, you have a 3 speed fan. To test, aircon off, ignition on, press demist, fan should run. If it doesn't, then you need to fit new bushes to the motor or replace. Alternatively, fit a 2 speed resistor as per my link from Jules

I'm sure one of the more informed members like Simon will be along soon with valuable advice

Russp · 12th May 2019, 19:42

Would fan run with no gas in system?

12th May 2019, 16:50	#1
Russp Loves to post MG ZT Join Date: Dec 2018 Location: holt Posts: 296 Thanks: 219 Thanked 112 Times in 49 Posts	Air conditioning not working I've recently had the aircon regassed but it doesn't seem to be cooling now. The compressor was a bit noisey but it seems to have got quieter. The car is a diesel, there doesn't appear to be any fan running under the bonnet when the air-conditioning is on is this normal? Cheers

12th May 2019, 17:56	#3
Mike Trident Posted a thing or two Rover 75 CDTi Saloon & Citroen C1 Join Date: Jun 2016 Location: Oakenshaw, Near Bradford Posts: 1,622 Thanks: 385 Thanked 552 Times in 328 Posts	Do you have the original old silver resister still fitted? Visible through the radiator grill. __________________ Rover 75 2.0 CDTi (131Ps) Conn SE Saloon. (Manual) 160 Remap, cruise control, electric window blind, temp gauge, Real walnut / ZT interior, FBH with GSM control. BORN Tuesday, 5th October 2004 @ 12:35:52 This vehicle was the 104,679th 75 to run off the production line, out of 112,381 This vehicle was the 3,318th 75 CDT Connoisseur SE (135) to be made out of 4,744 This vehicle was the 12,440th 75 in Starlight Silver (code: MBB) to be made out of 14,280 Starlight Silver 75s

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12th May 2019, 17:28	#2
Russp Loves to post MG ZT Join Date: Dec 2018 Location: holt Posts: 296 Thanks: 219 Thanked 112 Times in 49 Posts	The fan is definitely not running. Checked fuse and relay both ok

12th May 2019, 18:11	#4
Russp Loves to post MG ZT Join Date: Dec 2018 Location: holt Posts: 296 Thanks: 219 Thanked 112 Times in 49 Posts	If that is the circular object with wires in it in the OS lower part of the grille , yes

12th May 2019, 18:31	#6
Russp Loves to post MG ZT Join Date: Dec 2018 Location: holt Posts: 296 Thanks: 219 Thanked 112 Times in 49 Posts	I've been searching resistors, but there seems to be two and three speed versions how do I tell ? I don't think the object I saw I'd a resistor as it says its at two o'clock on the fan but I can't see anything there

12th May 2019, 19:30	#8
Russp Loves to post MG ZT Join Date: Dec 2018 Location: holt Posts: 296 Thanks: 219 Thanked 112 Times in 49 Posts	Just been browsing net and found a site which said run engine and switch on rapid demist and fan should run at high speed and if it doesn't system needs regassing. If this is correct where is the most common place for leaks? The compressor has been quite noisey recently especially when kicking in on auto mode. Is it worth changing this and the condenser or does that require the cooling system to be drained ?

12th May 2019, 19:41	#9
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,912 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	If you don't have a resistor fitted, you have a 3 speed fan. To test, aircon off, ignition on, press demist, fan should run. If it doesn't, then you need to fit new bushes to the motor or replace. Alternatively, fit a 2 speed resistor as per my link from Jules I'm sure one of the more informed members like Simon will be along soon with valuable advice

12th May 2019, 19:42	#10
Russp Loves to post MG ZT Join Date: Dec 2018 Location: holt Posts: 296 Thanks: 219 Thanked 112 Times in 49 Posts	Would fan run with no gas in system?