Do you hear the fan turn?

Most cars have a resistor to slow the fan down so if the fan turns only on the highest speed it's the resistor (more specifically the thermal fuse across the resistor) that is dead.
 
If the filter gets blocked the resistor gets hot and the thermal fuse blows. Then the resistor has no power. If the fan turns on full it's the resistor unit. If the fan doesn't turn then it's a fuse elsewhere or it's likely the fan.
 
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Yes that's the resistor.
seen them cheaper as you can get them without that housing not worth skimping on the pollen filter, if not hit the miles for changing its worth hoovering out on oil change while inspecting if its not that bad, use to change mine every year seem some clogged one though just depends on area you are in
 
You can repair the resistor for a couple of quid, the thermal fuse is cheap but you need to be able to solder
 
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You can repair the resistor for a couple of quid, the thermal fuse is cheap but you need to be able to solder
that's good too know as i can solder its getting the right one though , i had a right nightmare getting a replacement power switch on my sub as that was custom, sorted though
 
The trick with soldering a thermal fuse is to clamp some pliers on the lead to chill the lead so heat doesn't travel up it & "blow" the fuse.
 
Here's my method, snip the old fuse off leaving 5 to 10mm of the leads attached to the terminals. Use a solder with a higher melting point than the fuse and tin the old leads, cut the new fuse to fit over the old leads. Tin the new leads and then join it all together with a brief application of heat.
Alternatively you can crimp it in the original position if you can get the old fuse out. You can use a very small drill to make holes for the leads and bend the new leads back and the crimp it firmly.
 

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