Bosch E9: what it means and when to call a pro · United Kingdom
Severity: Stop and call a proBosch gas boiler error E9. 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 water flow.
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 water flow.
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
Condensing Gas Boilers FAQ, Bosch Home Comfort
The repair: Boiler overheating repair
Prices for repairs in United Kingdom are in GBP.
Other Bosch codes
- Bosch EA The flame went out during operation, or the flame sensor signal is faulty.
- Bosch E09 The water is not heating properly (heater or temperature sensor).
- Bosch E15 Leak protection has triggered (water where it should not be).
- Bosch E17 The machine is not getting enough water.
- Bosch E18 The machine cannot drain its water.
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.