Worcester Bosch
About Worcester Bosch →- 1017 W Water pressure too low
- 224 V Safety temperature limiter tripped
- 227 V No flame signal after ignition
- 9U 233 Heat control module (HCM) code plug faulty or disconnected
- A1 281 Pump stuck or running in air (little or no water in the system)
- B7 257 Internal error on the control board
- C1 264 Airflow stopped — the fan has stopped during operation
- C6 214 Fan not running
- C6 215 Fan running too fast
- C6 216 Fan running too slow
- CE 207 Low water pressure
- D1 240 Return temperature sensor wet or damaged
- D1 241 Return temperature sensor disconnected or damaged
- E2 222 Flow temperature sensor short circuit
- E2 223 Flow temperature sensor disconnected or damaged
- E5 218 Primary flow temperature too high
- E9 219 Heat exchanger overheated (safety limit reached)
- E9 224 Flue gas overheat — maximum thermostat activated
- EA 227 No flame detected after ignition
- EA 229 Flame lost during operation
- EA 234 Gas valve coil disconnected
- EA 261 Flame not established within the first seconds of ignition
- EA 338 Too many short burner starts — pump not detecting water
- EF 349 Flow and return temperature difference too large at minimum burner output
- F7 228 False flame — flame detected before the burner started
- FA 306 Flame detected after the burner stopped
- FD 231 Mains power interruption
- H11 Hot water outlet sensor defect
- H13 Annual service reminder
Vaillant
About Vaillant →- F.0 Flow temperature sensor interrupted
- F.1 Return temperature sensor interrupted
- F.10 Flow temperature sensor short-circuited
- F.11 Return temperature sensor short-circuited
- F.12 Hot water temperature sensor short-circuited
- F.20 Safety thermal cut-out has operated
- F.22 Low water pressure in the system
- F.23 Temperature difference between flow and return too great
- F.24 Temperature rising too quickly
- F.25 Flue gas temperature too high
- F.27 Flame signal detected while the burner is off
- F.28 No flame detected during ignition
- F.29 Re-ignition after flame loss was unsuccessful
- F.32 Fan fault
- F.35 Air/flue pipe blocked
- F.52 Mass flow sensor fault
- F.53 Combustion regulation fault
- F.54 Fault in the gas supply
- F.57 Boiler not burning correctly in comfort mode
- F.62 Flame switch-off detected after a delay
- F.70 Device specific number (DSN) incorrect or missing
- F.72 Invalid temperature difference between flow and return sensors
- F.75 Pressure change too low when the pump starts
- F.83 Little or no temperature rise when the burner starts
- F.84 Flow and return sensor readings are implausible
- F.88 Electrical connection to the gas valve interrupted
Ideal
About Ideal →- C0 Central heating signal problem
- F1 Low water pressure
- F2 Flame loss
- F3 Fan fault
- F4 Flow thermistor (temperature sensor) fault
- F5 Return thermistor (temperature sensor) fault
- F6 Outside temperature sensor fault
- F7 Mains voltage too low
- F9 Control board (PCB) not configured
- FD No water flow — air lock, low water or circulation problem
- L1 Low water flow, or flow temperature out of range
- L2 Ignition lockout
- L4 Flow thermistor (temperature sensor) fault
- L6 False flame detected
- L9 Overheating — temperature reading too high
Baxi
About Baxi →- E109 Pre-circulation fault
- E110 Overheat — safety thermostat tripped
- E117 Water pressure too high
- E118 Water pressure too low (below 0.5 bar)
- E119 Low water pressure
- E125 Primary circulation fault
- E128 Flame failure — the flame has failed repeatedly
- E130 Flue thermostat tripped
- E133 Failed to light — gas supply interrupted or flame failure
- E134 Gas valve open with no gas detected
- E135 Internal gas supply interruption
- E160 Fan or fan wiring fault
- E20 Central heating temperature sensor (NTC) fault
- E28 Flue sensor fault, or blocked flue/condensate pipe
- E321 Hot water temperature sensor (NTC) fault
- E384 False flame detected
- E40 Central heating return sensor fault
- E50 Hot water temperature sensor (NTC) fault
Glow-worm
About Glow-worm →- F.00 Flow temperature sensor fault
- F.01 Return temperature sensor fault
- F.10 Flow temperature sensor short circuit
- F.11 Return temperature sensor short circuit
- F.20 Safety switch-off — overheating temperature reached
- F.22 Safety switch-off — low water pressure
- F.23 Temperature difference between flow and return too great
- F.24 Temperature rising too fast
- F.25 Flue gas temperature too high
- F.27 Fault in flame detection
- F.28 Ignition unsuccessful when starting up
- F.29 Flame loss
- F.32 Fan speed outside tolerance
- F.61 Gas valve control fault
- F.62 Gas valve switch-off control fault
- F.63 EEPROM (memory) fault
- F.65 Electronics temperature too high
- F.70 Invalid product code (DSN)
- F.73 Water pressure sensor not connected or short-circuited
- F.75 Pressure sensor fault