Does anyone know if the (Elm) Le Blanc 420 boiler has a diverter valve (or not). A heating engineer has changed a thermostat and a solenoid but domestic hot water is still running cool. I suggested the diverter valve, as it's the classic symptom of a holed diaphragm but the engineer from British Gas (!) maintains that this boiler doesn't have one. If he's correct how is the water switched from CH to DHW?
tia Hugh
I don't know that boiler but it may have a cross flow main hea exchanger, where the dhw flows through the same heat ex as the CH bu through a different set of chanels. It's nothing new
-- Paul Barker
Hi Hugh I too have a Le Blanc boiler witha cold running hot water system. Th plumber insists on fitting a new boiler, he says he cant get th spares. How did you get on repairing yours? Can you help me please. Dave
-- haywardave
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