Ideal Boiler24 fault.

Clive P · Dec 29, 2013

Hi,
Anyone have any ideas on this one. Helping out a friend on a job ( not boiler related ) and had a look at their Boiler which hasn't been working since before Christmas. It displays an F3 fault--fan fault. The fan is running, and after a short time the fault code is displayed.
There are 3 other wires back from the fan ( pcb ) to the main PCB, is this a signal for fan running or is that from the pressure switch as normal?.
I'm not a Boiler engineer, an Electrician; so just looking for some likely causes.
The main PCB has been replaced.

Any thoughts?

Regards.

Sparkysoldman · Dec 29, 2013

I'm not a boiler engineer but mine did this last year it's probably a sticking fan !!! I sprayed mine with wd40 and worked fine for a few hrs then did the same again

a friend who is a plumber did the same using a silicone spray of some sort and that sorted it for about 6 months eventually the fan needed replacing

try that for a temporary fix

Spark1979 · Dec 30, 2013

From my knowledge of boilers the display never actually tells you 100 % whats wrong. Does the boiler try to ignite and how do you know fan is working / running dont think these boilers have pressure switches and its all done through the circuit board expensive mistake changing a fan that's not bust and remember if you do change it you must flue analyse boiler

Clive P · Dec 30, 2013

Hi,
Thanks for the replies.
The fan can be heard running, no attempt at ignition or anything , just the fan fault alarm.
I'm not going to be in the Boiler messing around, I'm not a registered gas man; just curios.
As you say I don't think this boiler has the set up via a pressure switch as some boilers do.

Regards.