HELP! CEL light on Fans come on all the time

[chochybear]

I have a 2002 4200 with 74000 miles. my CEL light came on yesterday, also noticed now even when cold my fans are always on.( starting from cold)
differcult to start from hot, ok from cold. Any one know what is wrong. Car seems to be running ok.

 

[CatmanV2]

Thermal switch, perhaps. I think you need to plug it into an OBDII reader. Plenty are available from cheap, to work with your phone, but of course your local indy would be able to help.
Where are you based?

C

 

[chochybear]

thank you I am in southend are you ever down this way

 

[CatmanV2]

Rarely, I'm afraid. I think there are some other members closer, but there may be an indy nearby.

C

 

[safrane]

Sounds like the thermostat behind the front grill is spent.

 

[chochybear]

Thank you I hope it is switch or thermostat. Does any one know how to get to either as I cannot see where they are?

 

[richard_masa_4200]

It's actually called a fan motor resistor. You can get at it from underneath. If you look between the fans and the engine it sits between the 2 fans towards the bottom of the unit. 2 wires (2 connectors) and 2 screws to remove. From memory you can also use the Alfa 166 part.

 

[Contigo]

http://www.eurospares.co.uk/partTable.asp?M=3&Mo=380&A=1&B=20134&S=

Part number 27 on the diagram.

 

[safrane]

Thread here

http://www.sportsmaserati.co.uk/showthread.php/5686-Radiator-Fan-problem?highlight=resistor

 

[chochybear]

Thread here

http://www.sportsmaserati.co.uk/showthread.php/5686-Radiator-Fan-problem?highlight=resistor

Fixed at last, first ordered water temp sensor and soon found out that was not the part needed.
Had to order fan motor resister from Italy and fitted yesterday.
Fixed problem after turning battery off and on.
Thanks every one for help and advice.

 

[BRR]

I had a similar issue, can't find the thread i made but i think i changed the resistor, thermostat and water temp sensor and that sorted it, all parts came from eurocarparts