About 6 months ago, it started locking out - but the local service guy got it sorted out. Unfortunately, it has started doing it again (although I've turned its internal thermostat up a bit, and it seems to be OK at the moment) - and I'm going to call him again tomorrow to have another look at it.
Anyway, my question really relates to the ignition (which I want to ask the service guy about, when he comes).
For the past couple of years, I have been aware of the following:
1. While the ignition is sparking, there has been a considerable increase in interference to the radio. My previous boiler was very bad, and needed the insertion of a suppressor in the ignition lead. This boiler used to quiet - but it now seems to have got pretty bad. [I'm pretty sure that neither the ignition lead nor the igniter have been changed.]
2. The time the ignition runs for seems excessive long. The ignition sequence is roughly - The motor starts - and at the same time, the igniter starts sparking (as heard on a nearby radio). - After about 3 seconds, there is a slight click (presumably the oil valve opening or pump starting). - After about 5 more seconds, there is a 'whump', and the boiler ignites. At the same time, the intensity of the interference drops slightly (presumably the flame is partially shorting the spark-gap). - The boiler continues to burn as it should, but the ignition spark (the interference) also continues for typically 30 to 40 seconds.
So has anyone got any advice as to whether this sort of behaviour is normal? I don't think there is any connection with the lock-out problem, but it would nice to know if the long ignition duration is typical - and if there's likely to be any service adjustment to shorten it to something more sensible.