My boiler has been working fine up until last night. I usually just
swich the boiler on went I want heat but yesterday I put it on to timer
for the first time in over a year and now it wont ignite. The pilot is
on but the boiler just wont fire up. I went through the shut down and
start up proceedures and the first two times I tried this, the boiler
swicthed on, and then swiched itself off after maybe three mins and now
it wont fire up at all. I'm asking for help here as I have just brought
home my new born son and the house is bloody freezing. There also seems
to be a humming noise which I havent been aware of before.. Any
Jason 'freezing' ward
There will be something in or next to the flame of the pilot that senses
the light or the heat of the pilot flame. If that sensor isn't working,
the main gas valve won't open. So that would be the first thing to look at.
The humming noise could be the sensor trying to operate the valve, but
not having enough energy to do so.
The thermocouple which senses the heat of the pilot light (and switches
off the gas supply if it doesn't sense heat) may have eroded and hence
is behaving as if the pilot light is off. A new thermocouple doesn't
Thermocouples often only last about 3 years.
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