Can anyone advise me. My boiler (Ideal Icos) has started making a strange noise. Its like the fan is struggling to turn. If I turn the thermostat on the front of the boiler down to about 65%, the noise goes away. Turning it up again, after about 10 minutes it starts again. Is there any reason this could happen?
The boiler is less than a year old, so will be calling Ideal this week.
Regards
Michael