Got a call on Friday night from a friend whose Baxi 105e combi
stopped firing up, when all the family were arriving at the
weekend for a long stay. After running through the possible
failures to ignite, I found the main gas valve solenoid coil
was open circuit. Managed to get a new one on Saturday morning
but it was the base Honeywell part, so I had to transfer the
modulator across. Failure had likely been accelerated by the
secondary heat exchanger furring up, resulting in the valve
continously cutting in and out in hot water mode, as the
primary temperature had been going up over 80 in an effort to
get required power transfered through the plate exchanger.
Anyway, replaced the gas valve, and defurred the plate
exchanger (and whilst the boiler was in bits, cleaned out the
burners, flue, etc), recommissioned, and it's all running
perfectly now.

Anyway, to the meat of the question... Have a burned out gas
valve left over. Is it possible to get just the replacement
coils for these? If so, and if they're cheaper than a whole
valve (£56 + VAT), this would seem like a sensible thing to
repair ready for next time it burns out (maybe in another 4
years time?). Not to mention than no one seems to keep stock
of this Baxi part anyway, which would be another reason to
have a refurbished spare ready to go on the shelf.

--
Andrew Gabriel