fan fault?

[owington]

Hi,
I was called to a fault today on a boiler i have never seen before. (Fagor Feb 20 E). The main 3 amp fuse would blow everytime the boiler was switched on. After disconnecting the wires at the fan the boiler would stay on but obviously not light. Am I right in assuming that the fan needs replacing or are there any other checks I should make first. My fault finding skills are not great having primarily worked on installations before.
Thanks

 

[southcoastboile]

yeah sounds like you are right, its normaly things that draw alot of power i.e fan pump

 

[SimonJohns]

You could do a resistance check on the fan. And then do the maths.

But does sound like a kaput fan

 

[Simon F]

do a resistance test on the fan, for a 3 amp circuit anything giving less than 80 ohms will pop the fuse
240/3 = 80

 

[owington]

Thanks lads, just started with this company and is my first fault so didnt want to order a fan and find out i'd made a mistake.