Fan kicks in immediately on diesel

Ravinder · 4th April 2017, 07:10

Hi

On the new arrival, I've noticed that the fan comes on immediately upon engine being started. Temp gauge doesn't go any higher then a quarter when it should be about half way. Car in question is a mk1 75 Tourer diesel. Any ideas? Many thanks.

FrenchMike · 4th April 2017, 07:42

Quote:

Originally Posted by Ravinder

Hi

On the new arrival, I've noticed that the fan comes on immediately upon engine being started. Temp gauge doesn't go any higher then a quarter when it should be about half way. Car in question is a mk1 75 Tourer diesel. Any ideas? Many thanks.

Hi,note the "true" engine temp using OBD in 7.0

Could be a stuck relay or a faulty PCB in the relay box (in that case i can help)

Is it a 2 or 3 speed fan ?

Mike

Mickyboy · 4th April 2017, 07:53

Is the heater control switched onto ECON ? If not it's probably the relay as mentioned

Ravinder · 4th April 2017, 07:59

Thanks. Well, heater is switched off. Even when on, it seems to be the same. Car is 'Classic' spec.

I'm not sure if it's two speed or three speed. How do I check this?

Thanks.

FrenchMike · 4th April 2017, 08:21

Quote:

Originally Posted by Ravinder

Thanks. Well, heater is switched off. Even when on, it seems to be the same. Car is 'Classic' spec.

I'm not sure if it's two speed or three speed. How do I check this?

Thanks.

In case of 2 speed,you must see through the grill at 2 o' clock (sorry TC),a resistor.

Anyways,it's a bump removing affair

Ravinder · 4th April 2017, 08:24

Ok, I will check this and report back.

T-Cut · 4th April 2017, 08:57

Quote:

Originally Posted by FrenchMike

In case of 2 speed, you must see through the grill at 11, a resistor.

Behind the fan blades at the 2 o'clock position is where the resistor usually fits.

Here's a photo from Jules' shop:

TC

Avulon · 4th April 2017, 12:20

Quote:

Originally Posted by FrenchMike

In case of 2 speed,you must see through the grill at 2 o' clock (sorry TC),a resistor.

Anyways,it's a bump removing affair

Not on a mk1 it isn't (to change the resistor), but would be to get at the fan control box.

Quote:

Originally Posted by T-Cut

Behind the fan blades at the 2 o'clock position is where the resistor usually fits.

Here's a photo from Jules' shop:

TC

Glad you said 'usually' there - I've found one tucked to the side behind the fan cowl - and it was a silver one: failed of course....

T-Cut · 4th April 2017, 15:51

Quote:

Originally Posted by Avulon

Glad you said 'usually' there - I've found one tucked to the side behind the fan cowl - and it was a silver one: failed of course....

There are exceptions to everything. Resistors hidden behind the cowl probably failed the first time the aircon was used.

TC

Coups · 4th April 2017, 16:21

My fan starts immediately I start the car if the air con is on. It goes off if I select econ on the atc. Check this isn't all it is Rav, it might be there's nothing wrong with the car at all.

Sent from my iPhone using Tapatalk

4th April 2017, 07:10	#1
Ravinder This is my second home Rover 75 saloon x2, Rover 75 Tourer x2, Rover 220 Coupe Turbo Join Date: Aug 2010 Location: Kirkcaldy, Fife Posts: 9,036 Thanks: 2,278 Thanked 2,852 Times in 1,718 Posts	Fan kicks in immediately on diesel Hi On the new arrival, I've noticed that the fan comes on immediately upon engine being started. Temp gauge doesn't go any higher then a quarter when it should be about half way. Car in question is a mk1 75 Tourer diesel. Any ideas? Many thanks. __________________ Wanted - Indian bride. Cash waiting. (All sorted - bargain) First name and forum name: Ravinder Rover 75 2.0 CDT Connoisseur SE 116 (160 remap) Royal Blue (JFM) This vehicle was the 50,481st 75 to run off the production line, out of 112,381 This vehicle was the 2,238th 75 CDT Connoisseur SE to be made out of 3,775 This vehicle was the 5,002nd 75 in Royal Blue (code: JFM) to be made out of 14,420 Royal Blue 75s

4th April 2017, 07:53	#3
Mickyboy SERVICING AND DEALER DIAGNOSTICS MG ZT CDTI 135 + & MGZT CDTI AUTO 160 & ROVER 75 TOURER CDTI 160 TROPHY YELLOW Join Date: Aug 2013 Location: Hernebay Posts: 4,331 Thanks: 818 Thanked 2,414 Times in 1,141 Posts	Is the heater control switched onto ECON ? If not it's probably the relay as mentioned __________________ [SIGPIC][/SIGPIC] T4 Owner Jobs done : new UBP, Spy hole mod, Rear hub(wheel bearing),plenum cleaned and emptied, Inline thermostat fitted,Full service, In car Digital tv/DVD Bluetooth Satnav etc, Replaced UBP, Restored headlights,Fixed airbag connection.replaced HP pump,replaced rear light seals,changed intercooler O rings. Jobs to do: ,replace drivers lock,.[/SIZE]

4th April 2017, 07:59	#4
Ravinder This is my second home Rover 75 saloon x2, Rover 75 Tourer x2, Rover 220 Coupe Turbo Join Date: Aug 2010 Location: Kirkcaldy, Fife Posts: 9,036 Thanks: 2,278 Thanked 2,852 Times in 1,718 Posts	Thanks. Well, heater is switched off. Even when on, it seems to be the same. Car is 'Classic' spec. I'm not sure if it's two speed or three speed. How do I check this? Thanks. __________________ Wanted - Indian bride. Cash waiting. (All sorted - bargain) First name and forum name: Ravinder Rover 75 2.0 CDT Connoisseur SE 116 (160 remap) Royal Blue (JFM) This vehicle was the 50,481st 75 to run off the production line, out of 112,381 This vehicle was the 2,238th 75 CDT Connoisseur SE to be made out of 3,775 This vehicle was the 5,002nd 75 in Royal Blue (code: JFM) to be made out of 14,420 Royal Blue 75s

4th April 2017, 08:24	#6
Ravinder This is my second home Rover 75 saloon x2, Rover 75 Tourer x2, Rover 220 Coupe Turbo Join Date: Aug 2010 Location: Kirkcaldy, Fife Posts: 9,036 Thanks: 2,278 Thanked 2,852 Times in 1,718 Posts	Ok, I will check this and report back. __________________ Wanted - Indian bride. Cash waiting. (All sorted - bargain) First name and forum name: Ravinder Rover 75 2.0 CDT Connoisseur SE 116 (160 remap) Royal Blue (JFM) This vehicle was the 50,481st 75 to run off the production line, out of 112,381 This vehicle was the 2,238th 75 CDT Connoisseur SE to be made out of 3,775 This vehicle was the 5,002nd 75 in Royal Blue (code: JFM) to be made out of 14,420 Royal Blue 75s

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4th April 2017, 16:21	#10
Coups Posted a thing or two Rover 75 Contemporary SE Join Date: Apr 2014 Location: Dundee Posts: 1,941 Thanks: 545 Thanked 520 Times in 402 Posts	My fan starts immediately I start the car if the air con is on. It goes off if I select econ on the atc. Check this isn't all it is Rav, it might be there's nothing wrong with the car at all. Sent from my iPhone using Tapatalk