F.76
Vaillant fault code
Vaillant F.76: overheating protection on the primary heat exchanger has responded
Engineer only
Vaillant describes F.76 on ecoTEC plus boilers as: overheating protection on the primary heat exchanger has responded. Possible causes Vaillant lists, for an engineer to check: cable or connections for the safety fuse in the primary heat exchanger, or the primary heat exchanger, defective.
What you can safely do
There is nothing you can safely do yourself with this one. Leave the boiler off and book an engineer.
Call a Gas Safe engineer if
- Book a Gas Safe registered engineer.
Find a Gas Safe engineer near you
Opens the official Gas Safe Register search.
Applies to: ecoTEC plus. Codes can differ between models, so check your manual.