My five year old Worcester Bosch 350 sometimes has several attempts to
fire up when the room stat calls for heat.I can hear the main flame
come on then after about 10 secs it comes on again.(Pump keeps running
regardless) Sometimes it wont light and I have to turn the room stat
off and let it have another attempt.
It eventually fires up but it's annoying to keep coming home to a cold
house. Any pointers please? michaelangelo7

"michaelangelo7" wrote in message
oups.com...
My five year old Worcester Bosch 350 sometimes has several attempts to
fire up when the room stat calls for heat.I can hear the main flame
come on then after about 10 secs it comes on again.(Pump keeps running
regardless) Sometimes it wont light and I have to turn the room stat
off and let it have another attempt.
It eventually fires up but it's annoying to keep coming home to a cold
house. Any pointers please? michaelangelo7


It needs properly serviced. It could be a build up of dirt on the burner and
surrounding detector devices, like the pilot flame coupling etc. So get it
cleaned and serviced properly and it should be OK.

In message .com,
michaelangelo7 writes
My five year old Worcester Bosch 350 sometimes has several attempts to
fire up when the room stat calls for heat.I can hear the main flame
come on then after about 10 secs it comes on again.

Do you mean that it fires up, goes off and tries again ?

It sounds like a problem with the sequence board (Zagas 126) or the HT
cable if it senses the flame (I should know, but senility must be
getting the better of me)

(Pump keeps running
regardless) Sometimes it wont light and I have to turn the room stat
off and let it have another attempt.
It eventually fires up but it's annoying to keep coming home to a cold
house. Any pointers please? michaelangelo7


--
geoff