aircon/cooling fans

mark d3 · 9th January 2010, 15:24

should my fan [cooling] run when i switch my aircon on?because it doesent,and i dont think it ever has.The other thing that happens when you press the auto button temp drops to 16 but stays hot,the only way to get aircon is to drop the temp to lo is this normal?

T-Cut · 9th January 2010, 17:00

It sounds like your slow speed fan system has failed. The fan should run continuously when the system is in Auto. It should turn off when you switch to Econ. In this freezing weather, the fan may not run, but you say it never has. Even today, it should run when you press the Demist button. That trips aircon on as well as the fan (or should).

Depending on the age of the car, you'll either need a new motor or a new slow speed resistor. The latter are mainly fitted to facelift models.

The strange behavious of the climate control is probably due to the failure of the aircon system to work properly. It may well come right when the fan's working properly.

TC

mark d3 · 9th January 2010, 18:07

Quote:

Originally Posted by T-Cut

It sounds like your slow speed fan system has failed. The fan should run continuously when the system is in Auto. It should turn off when you switch to Econ. In this freezing weather, the fan may not run, but you say it never has. Even today, it should run when you press the Demist button. That trips aircon on as well as the fan (or should).

Depending on the age of the car, you'll either need a new motor or a new slow speed resistor. The latter are mainly fitted to facelift models.

The strange behavious of the climate control is probably due to the failure of the aircon system to work properly. It may well come right when the fan's working properly.

TC

thanks for clearing that up tc,cars 9 year old,looks like the bumpers coming off anyway so will sort the fan at the same time

pab · 9th January 2010, 18:23

without the engine running,with the ignition in the second position,press auto..the fan should run

have a search ..loads of stuff on cooling fan.

mark d3 · 9th January 2010, 18:28

Quote:

Originally Posted by pab

without the engine running,with the ignition in the second position,press auto..the fan should run

have a search ..loads of stuff on cooling fan.

thanks pab will do

9th January 2010, 15:24	#1
mark d3 This is my second home rover 75 saloon,cdt 170 bhp(ish) Join Date: Dec 2008 Location: maesteg Posts: 3,150 Thanks: 6 Thanked 7 Times in 5 Posts	aircon/cooling fans should my fan [cooling] run when i switch my aircon on?because it doesent,and i dont think it ever has.The other thing that happens when you press the auto button temp drops to 16 but stays hot,the only way to get aircon is to drop the temp to lo is this normal? __________________ [SIGPIC][/SIGPIC][B meets and events in wales one event everyone should experience http://www.wolverhamptonnanomeets.com/

9th January 2010, 17:00	#2
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	It sounds like your slow speed fan system has failed. The fan should run continuously when the system is in Auto. It should turn off when you switch to Econ. In this freezing weather, the fan may not run, but you say it never has. Even today, it should run when you press the Demist button. That trips aircon on as well as the fan (or should). Depending on the age of the car, you'll either need a new motor or a new slow speed resistor. The latter are mainly fitted to facelift models. The strange behavious of the climate control is probably due to the failure of the aircon system to work properly. It may well come right when the fan's working properly. TC

9th January 2010, 18:23	#4
pab Banned MG ZT V6 190+ Join Date: Sep 2008 Location: Leeds Posts: 33,223 Thanks: 41 Thanked 1,614 Times in 1,416 Posts	without the engine running,with the ignition in the second position,press auto..the fan should run have a search ..loads of stuff on cooling fan.