I was called to look at an Ideal Minimiser by a customer today as their boiler had required resetting a couple of times in the week after noticing that the heating and hot water were not working.
I ran the boiler and it appeared to be running and lighting with no issues. I could hear the spark across the electrodes which was rapid and maybe more prolonged than it should have been. I let the boiler cool a littler before stripping out the fan and burner.
As can be seen from the picture above, both the sensing probe and electrodes were distorted and required replacement. There are a number of different setups that can be found on these boilers and this is the original burner plate and electrodes. As far as I am aware the original electrodes cannot be replaced as they are. The new electrodes are stouter and come with a new burner mounting plate. The newer boilers had an atmospheric kit fitted and some older ones have it retro-fitted. On these boilers there is no tube connected to the burner plate. If there is no atmospheric sensing kit fitted then then the burner plate replacement will need to have an orifice for the existing tube which connects in on the right hand side of the burner plate.
I replaced the burner plate and electrodes Parts Center no. 462190, and the boiler has been of no trouble since.
Disclaimer:
The works described in this blog
are a record of work undertaken and should not be taken as guaranteed to
solve your problem.
Work should only be carried out by
persons qualified and competent to do so.
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