Vaillant gas boiler F.22: what it means and when to call a pro · Czechia
Severity: Stop nowVaillant gas boiler error F.22. The water pressure in the heating system is too low.
Smell gas? Leave the building and call the gas emergency number: 1239
Meaning
The water pressure in the heating system is too low.
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 and call a pro.
Source
Official Boiler Fault Codes List, Vaillant
The repair: Boiler low pressure repair
Prices for repairs in Czechia are in CZK.
Other Vaillant codes
- Vaillant F.23 The temperature difference between flow and return is too large, usually because water is not circulating well.
- Vaillant F.24 The boiler temperature is rising too fast, usually because water is not circulating well (air, closed valves or a pump problem).
- Vaillant F.25 The flue gas temperature is too high, or the flue or air supply is faulty or blocked.
- Vaillant F.28 The boiler failed to ignite (no flame was detected) and has locked out.
- Vaillant F.29 The flame went out during operation, or the flame sensor signal is faulty.
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.