Vaillant gas boiler F.28: what it means and when to call a pro · Czechia
Severity: Stop nowVaillant gas boiler error F.28. The boiler failed to ignite (no flame was detected) and has locked out.
Smell gas? Leave the building and call the gas emergency number: 1239
Meaning
The boiler failed to ignite (no flame was detected) and has locked out.
Severity
Stop now
Stop. Switch it off and call a pro
Steps are not shown for this code because no qualified person has reviewed them yet. What is safe: switch it off, follow the Do not list and call a pro.
Do not
- Do not keep pressing reset. The maker allows three resets at most.
- Do not take the boiler casing off.
Source
The repair: Boiler ignition lockout repair
Prices for repairs in Czechia are in CZK.
Other Vaillant codes
- Vaillant F.29 The flame went out during operation, or the flame sensor signal is faulty.
- Vaillant F.32 The fan is faulty or is not reaching the correct speed.
- Vaillant F.61 The boiler cannot actuate its gas valve, which indicates a fault in the gas valve assembly.
- Vaillant F.63 The memory chip (EEPROM) on the boiler's control board is faulty.
- Vaillant F.75 The boiler did not detect the expected pressure change when the pump started.
Brands in our catalog for gas boiler: Ariston, Baxi, Bosch, Ferroli, Ideal, Potterton, Vaillant, Viessmann, Worcester Bosch. The same code on another brand is not in the catalog yet, and we do not guess what it means.