Does anyone know the part number for the fan relay. Bile overheats without fan turning on

 

Check the fan before accusing the relay.

Pull the wire to the relay and send it directly to the fan.
Be careful because it is a hot wire (+) going to the relay.
Don't accidentally touch ground with it or you will blow fuses.

If the fan comes on, it's good. If not, then consider replacing the temp relay.

here's the part fiche for the F3 radiator assembly...
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Don't assume that the fan is the cause of the heat issue, though.
Double check fluid levels, in the radiator and the over-flow tank.
Consider replacing the radiator cap, as well. It's cheap and they do wear out.
The thermostat should also be checked out and/or replaced.

If the coolant is over 2-ish years old, replace it as well.

Most of my suggestions are inexpensive and are really considered proper maintenance,
regardless of whether you're having any heating issues.

Hope this helps, Ern