hi im having a problem with my ariston microgenus mffi23 combi boiler, lockout led comes on regularly and boiler resets when i press reset button. was advised to change thermistor, is this the DHW temperature sensor? where could i get one please
it is in manual as ignition failure lockout red l.e.d. The boiler will not reset if the temperature l.e.d's [yellow] are lit but if i run some hot water i can reset? p.s this problem has started since i emptied system to clean it.
From your description i havent got a clue. Temp and thermistors should have nothing to do with ignition. Although it would probably be more clear when in front of the thing.
Can only suggest getting a competent boiler engineer out.
thanks anyway, had similar prob last year and had about 4 different engineers to it, had british gas sort it, new secondary exchanger and dhw probes. Only about 8 years old but maybe should think about replacing it.
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