Hi folks. I have a kingfisher CF 55 outdoor (old) boiler which has
started playing up.
After a power cut the boiler will not ignite by itself.
I have checked all fuses & checked that thermocouple tip is located in
pilot flame. The thermocouple was replaced by an engineer a year ago.
The boiler lights fine when I do it with matches and all the covers
are replaced in front of the boiler. It seems that when the house
reaches the right temp. the boiler cuts of the flames but is not able
to ignite later on.
This is pure guess work by me however.
All help is greately welcomed as its SNOWING outside again!
I'd say the likely cause is a partially blocked pilot light jet causing
the flame to be too small to activate the thermocouple. Remove it and give
it a good soak followed by a scrub in hot water with washing up liguid.
Use an old toothbrush or similar.
*Why is the third hand on the watch called a second hand?
Dave Plowman email@example.com London SW 12
On Sat, 31 Jan 2004 11:58:15 +0000, BigWallop wrote:
We (I actually) need to establish whether 'lights fine' means you can
light the pilot with matches OK or you can light the main burner at full
rate with matches.
The former is OK and I suspect that there is probably a marginal
pilot/thermocouple problem when the boiler gets hot.
The latter would be a very dangerous condition, I don't think you mean
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Sorry for the delay in returning the post.
I can ignite the pilot with matches.
What happened the other day was that the light didn't go out. It was
a dodgy shade of orange tho. I left it with the intention of cleaning
it when the wether permitted me to get in there with the tools to
When I returned a day or two later the flame was steady & blue. I
guessed that something must have been blocked in there and so if this
happens again it should just be a matter of cleaning it.
thanks for all help guys.
This comes from many years experience nursing a temperamental Johnson
Starley WAU, so if it doesn't apply, just ignore me.....
There should be an air inlet at the base of the pilot assembly, when this
becomes obstructed (by dust etc) the pilot turns from blue to yellow, (due
to oxygen starvation?) then if the restriction gets worse (more dust)
eventually goes out and won't re-light. If you know where the air inlet is,
just give it a quick suck from a vacuum cleaner (with everything shut-off
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