Ideal classic ff240 problems

12 Dec 2007
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United Kingdom
A mate of mine has a problem with his ideal classic ff240 boiler it fires up ok on demand for either DHW or CH although after approx 2 mins the boiler switches its self off and won't restart for a good 5 minutes. Every thing else seems to be working fine ie pump/motorised valve. The flow is starting to heat up prior to the boiler shutting down. Its a sealed heating system and the pressure was about 0.75 bar and when i increased the pressure it shot round to 2.5 bar quicker than you could blink which seemed a bit odd to me. Has anybody got any ideas before calling anybody round.
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Try increase the pressure to about 1.5 bar and bleed all the rads make sure the pressure is still correct then try
sounds like a pump problem. probably not rotating fast enough due to wear / crud
the pressure is a red herring as the boiler will still work at zero as there is no pressure switch as it is a heat only boiler or a system boiler if the pressure vessel is on top in a similar box to the boiler

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