Vaillant ecotec plus 438 no heating or hot water

Vaillant ecotec plus 438 no heating or hot water

Vaillant ecotec plus 438 no heating or hot water

Morning all,

Heating was left on last night, and hot water came on at 7 to 8 am and now I can't get either hot water or heating to work. The pump does work however as I have done the pump test from the boiler.

Can the 3 port valve be faulty? But in any case the heating or hot water should kick in.

Had a powerflush last month.

by noddy997

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