Ferroli A03: what it means and when to call a pro · United Kingdom
Severity: Stop and call a proFerroli gas boiler error A03. The boiler overheated and the safety thermostat cut it out, usually because heat is not being carried away from the boiler, for example by closed radiator valves or poor circulation.
Smell gas? Leave the building and call the gas emergency number: 0800 111 999
Meaning
The boiler overheated and the safety thermostat cut it out, usually because heat is not being carried away from the boiler, for example by closed radiator valves or poor circulation.
Severity
Stop and call a pro
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.
Source
The repair: Boiler overheating repair
Prices for repairs in United Kingdom are in GBP.
Other Ferroli codes
- Ferroli F37 The heating system water pressure is too low, usually because of a slow leak or water lost from the circuit.
- Ferroli A01 The boiler failed to ignite (no flame was detected) and has locked out.
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.