Floor Combi boiler, works fine for hot water, but not heating

shaham · 25 Jan 2018

Highflow 3.5 BF Boiler, has worked brilliantly all its life. Now on last legs.

With central heating on, the boiler shuts down after about 20 minutes, but with just hot water, it works perfectly well.

The heating control thermostat seems only to click near its low point. Even with low heat setting, the boiler shuts down after about 20 minutes. Then I have to re-light the pilot flame.

Anyone out there with some explanations as to what is causing this problem?

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Floor Combi boiler, works fine for hot water, but not heating

shaham

DIYnot Local

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