My A/C cooling fan is not coming on in my 2003 Disco II how do I check to see if it is the Fuse or switch or fan unit it self?

Should it come on everytime A/C is on?

I am in Arizona so it is hot all the time.

A/C Air is getting cold.

Any help would be great.

Thanks,

Duke

 

The a/c fan will not come on until the engine temp is normal and the outside air is over 75*F?
With the key off try and turn the fan by hand, if you cannot spin the fan blades by hand the fan is seized.
If you can then you need to check the fuse.
It is common for the fan motor to seize and blow the fan fuse.

 

Spin fan with truck off, it should freewheel. Use small screwdriver, etc., to get through the shroud. If it is stiff to turn, it has probably blown the fuse, and won't be coming on. Replacing the fuse will be sort lived, as fan heats up bearing friction increases. Fuse 5 in underhood box is connected by relay to run fan. Relay is switched on by ECU when ECU decides it is time for fan.

Those times from the shop manual are:

(212 °F)

On a D1 they are on (two of them) whenever AC is on. On the D2, as above, controlled by the brain.

 

Perfect I will do that and see what gives. Thanks for the help

Duke in Hot old AZ

 

Use this link to get the Discovery II electrical manual

http://www.google.com/url?sa=t&rct=j...1bTuJA&cad=rja

Cooling fan relay supply
A feed from fuse 5 in the engine compartment fusebox, is connected to the contacts of the
cooling fan relay.
Cooling fan motor operation
When the main relay is energised, a feed passes from the relay contacts to the coil of the
cooling fan relay. The cooling fan relay coil is earthed on a BP wire (Td5 engines) or a GW
wire (V8 engines) to the ECM.
When conditions are correct, the ECM provides the earth path which energises the cooling
fan relay coil closing the contacts. The feed from fuse 5 in the engine compartment fusebox
passes through the cooling fan relay contacts and from the fusebox to the cooling fan motor
on a BN wire. The feed operates the cooling fan motor which is connected to earth header
C0018 on a B wire.

 

Check the fuse in the engine compartment, either it is bad and or the fan motor has failed which is kind of normal.
In the mean time, do not drive in your hot weather unless you have to and do not run the a/c or you will over heat/toast your engine.

 

x2 on the don't run the AC, unless you are a freeway speed, where fan is off anyway or use the backup "260" system - roll down two windows and go sixty....

 

In Arizona, where I lived for years, I wouldn't run the AC for any reason and drive as little as possible.
Get the fan replaced quickly.
If you want a good used fan, let me know.