On Feb 15, 11:48*am, " wrote:
Can I buy just the relay component or do I have to replace the whole
honeywell box on my boiler? *Sometimes when the heat wants to go on it
keeps switching on and off very quickly just as the burners start to
light.

Is the box a just a relay and transformer, mine is, but if its more
than that how do you know its the relay. I have several Honywell
relays maybe 50 yrs old working now, I have no idea how old really,
Honywell relays just work. If its just a relay start by checking the
voltage of it, there is a certain voltage and call a supply house or
honywell to see if its in spec, or google. Switching on and off sounds
like some saftey is cutting it out, check for loose connections,
safteys controll the whole boiler, gas valve, maybe flue damper, low
water etc. Once my pilot assembly got wet from a leaking pipe, a bit
of water never dried on some external wiring and kept it from firing.
I would make sure all connections to the main board are clean and
tight first, the Honywell relay sould outlast the boiler.