Bosch Combi Boiler Error Codes And How To Resolve Them
Bosch combi boiler fault codes provide crucial information for identifying issues in heating systems. These codes offer a quick overview of the device’s performance, aiding users in understanding potential problems. Accurate identification of combi faults can expedite repair processes and enhance energy efficiency. Bosch combi boiler fault codes enable timely intervention, contributing to the safer and more effective operation of heating systems.
Worcester Bosch Greenstar Codes
In the event that the appliance stops functioning or does not perform as expected, please see table below These problems are some of the most common causes. Should the problem persist or if other fault codes are displayed, then it will be necessary to contact Worcester, Bosch Group.
When calling Worcester, Bosch Group, you may be asked for the error code. This Table is for you to help identify
the possible cause of the fault.
- Do not try to rectify any of the faults listed below by yourself.
- Contact British Gas or a competent, qualified engineer (Gas Safe registered personnel)
Press the reset button [2] for three seconds. The reset button [2] and the ON/OFF indicator [5] will stop flashing. The boiler will function normally, dependent on programmer and room thermostat settings.
If the fault cannot be cleared by pressing the reset button:
- Refer to the fault finding section on page 10 of these user instructions.
- Call Worcester, Bosch Group, giving a description of the fault and, if possible, the fault code from the seven segment display. Alternatively contact other Gas Safe registered personnel for assistance.
i1,i2,i3,..200,201,202… These are not faults, but provide information concerning the current status of the appliance. During normal appliance operation various Status codes can be displayed by pressing the info button. The first screen of the Information menu displays the current Status code, this will change as the appliance runs through the various modes and sequences.
Bosch Condens 2000 W Codes
| Failure Code on Display | Failure Descripton |
|---|---|
| 11 | MAP not selected (Fan speed adjustment according the flue pipe length). |
| A2 | Combustion chamber NTC failure (behind burner) : when the temperature by CC NTC reached to limit |
| A6 | Combustion chamber NTC failure (behind burner) : when NTC not detected or open circuit |
| A7 | Domestic hot water temperature sensor not correct installed or failure. |
| B3 -> d5 | Short circuit / failure in water level switch. |
| CE -> d4 | Gradient limit : Temperature rises too rapidly in heating mode |
| C7 | Fan sensor not detected. |
| C8 | Fan speed can not reached to target speed. |
| d7 | Modulator coil failure (regulator valve on gas valve) |
| EA | Ignition lock-out (flame not detected) (pump is running) |
| E2 | Flow temperature sensor failure (pump is running) |
| E9 | Overheat lock-out by temperatur limiters (STBs) (Flue gas + prim. Heatexchanger). In this case ; Heat demands is blocked and pump stops 3 min. later. |
| FA | Safety valve leaks. |
Bosch Gas Condensing Stainless Steel Boiler SSB Boiler Codes
Lockout Codes
If an error is a “Lockout” error, it is necessary to press “RESET” button (after eliminating the reason for the failure) to restart the boiler. In the following table the “Lockout” errors are listed:
Blocking Codes
If an error is a “Lockout” error, it is necessary to press “RESET” button (after eliminating the reason for the failure) to restart the boiler. In the following table the “Lockout” errors are listed:
Troubleshooting
| Trouble | Cause |
|---|---|
| Desired room temperature is not reached | Thermostatic radiator valve(s) set too low |
| Temperature control for central heating flow on appliance set too low | |
| Low temperature setting on the room thermostat | |
| Air trapped in heating system | |
| Low system water pressure | |
| Desired room temperature too high | Thermostatic radiator valves are set to high |
| Room thermostat is set too high | |
| Radiators are too hot | Temperature control on appliance set too high |
| Heating stays on for too long | Clock is incorrectly set |
| No blue Operation/Fault Indicator demand | Momentary power failure |
| Heat requirement demand operation light has been deactivated | |
| Hot water temperature too low | Temperature set too low on appliance controls |
| Water flow at tap too high | |
| Air trapped in heating system | |
| Low system water pressure | |
| Hot water temperature too high | Temperature set too high on appliance controls |
| Water flow at tap too low |
Manual Pdf
Worcester Bosch Greenstar Manual PDF
Bosch Condens 2000 W Manual PDF
Bosch Gas Condensing Stainless Steel Boiler SSB Boiler Manual PDF
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