Medium
6 on Vaillant ecoMAX 828E

Your boiler has temporarily stopped heating your home or water because a safety control has triggered, usually due to a temporary build-up of heat.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Boiler shut down on CH or DHW thermostat

From this model's manual
Verified against the Vaillant/Vaillant Ecomax 828e installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Check that your heating and hot water controls are not set too high.Ensure all your radiator valves are fully open so water can circulate properly.Try resetting the boiler using the reset button once it has had time to cool down.

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Related fault codes

F.20View →F.22View →F.36View →

All 26 fault codes on the ecoMAX 828E

Seeing a different code? Every code this model can display, in one place.

012345789E11E12E13F00F04F05F10F14F15F20F21F22F23F26F32F40

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