saunier duval heating not working but plenty of hot water

taper · 5 Feb 2004

model thelia23 heating will not come on with timer if you move the (summer and winter switch) no1micro swith to the centre heating comes on , i have replaced the circuit board at a cost but still not working .could this be a thermostst problem

help

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saunier duval heating not working but plenty of hot water

taper

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