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Rob
Rob, Home Appliance Technician
Category: Appliance
Satisfied Customers: 420
Experience:  20 yrs. experience with a major worldwide manufacturer.
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I have Vaillant eco tec plus 831. Pressure gauge 1.3 bar.

Customer Question

I have Vaillant eco tec plus 831. Pressure gauge 1.3 bar. I have intermittent F28 code and then I have no hot water or central heating. Left overnight and now ok. This has happened twice.
Submitted: 1 year ago.
Category: Appliance
Expert:  Plumberpro replied 1 year ago.
Hi , I would start by replacing the flame sensing probe. Iffaulty it will not sense the flame and go to f28