Vaillant Boiler Problems & Fault Codes: Complete Troubleshooting Guide
Vaillant boiler not working? Find common problems and fault codes including F22, F28, F29, F32, F61, F62 and F75, with safe checks and repair guidance.
Vaillant F27 Fault Code: False Flame Signal, Causes & What to Do
Vaillant boiler showing F27? Learn what the false flame signal means, possible gas valve and PCB causes, F27 vs F28/F62 and when to call a Gas Safe engineer.
Vaillant F35 Fault Code: Air & Flue Fault, Causes & What to Do
Vaillant boiler showing F35? Learn what the air/flue fault means, possible causes, safe checks, F32 vs F35 and when to call a Gas Safe engineer.
Vaillant F20 Fault Code: Boiler Overheating, Causes & How to Fix It
Vaillant boiler showing F20? Learn what the overheating safety fault means, possible causes, safe checks, F20 vs F76 and when to call a Gas Safe engineer.
Vaillant F62 Fault Code: Gas Valve Fault & What to Do
Vaillant boiler showing F62? Learn what the delayed flame shut-off fault means, its possible causes, F61 vs F62 and when to call a Gas Safe engineer.
Vaillant F29 Fault Code: Flame Loss, Causes & What to Do
Vaillant boiler showing F29? Learn what the flame-loss fault means, common causes, safe checks, F28 vs F29 and when to call a Gas Safe engineer.
Vaillant F76 Fault Code: Heat Exchanger Fault & What to Do
Vaillant boiler showing F76? Learn what the heat exchanger overheating fault means, possible causes, whether it can be reset and when to call a Gas Safe engineer.
Vaillant F32 Fault Code: Meaning, Causes & How to Fix It
Vaillant boiler showing F32? Learn what the fan fault means, its possible causes, safe checks, repair options and when to call a Gas Safe engineer.
Vaillant F61 Fault Code: Meaning, Causes & What to Do
Seeing F61 on your Vaillant boiler? Learn what the F61 fault code means, its likely causes, safe checks to make and when to call a Gas Safe engineer.
F75 Vaillant Boiler Fault: What It Means & How to Fix It
Vaillant boiler showing F75? Learn what the F75 fault means, the likely causes, safe pressure checks and when you need a Gas Safe engineer.
Vaillant F22 Fault Code: Low Water Pressure, Causes & How to Fix It
Vaillant boiler showing F22? Learn what the low-pressure fault means, safe repressurisation steps, possible causes and when to call a Gas Safe engineer.
Bleeding Radiators Sequence: How to Bleed Radiators Properly
Learn the correct bleeding radiators sequence, plus a safe step-by-step method, boiler pressure tips, common mistakes, and when to call an engineer.