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Mend Vaillant ecotec plus Ecotec Boiler

how can i fix my Vaillant ecotec plus boiler?

everytime i switch it on it goes off after about 2mins then displays 5fh on the screen them goes back on after about 5mins what does this mean and how can it be fixed is it a major problem?

jacqueline
January 2011

Vaillant Vaillant ecotec plus Heating, Home Heating Systems Vaillant Ecotec Boiler

To display SFH you must be pressing the minus (-) and plus (+) buttons together. IF you're not pressing them, then there is a fault with the display board (the buttons must be sticking).

It represents the boiler running at full rate until temperature forces shutdown and is used for commisioning etc.

Carefree
January 2011

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Vaillant Ecotec Plus: Error 5fh - Fix & Guide