Source-backed catalogue
Verified boiler fault-code guides
Choose a supported model and code to read the catalogue entry and its source documents.
Worcester Bosch · Greenstar CDi Compact ErP
- Worcester Bosch CE 207System water pressure too low.
- Worcester Bosch A1 281Pump stuck or running in air, little or no water in the system.
- Worcester Bosch A7Domestic hot water sensor defect.
- Worcester Bosch E2Flow sensor short or open circuit.
- Worcester Bosch D1Return sensor error.
- Worcester Bosch F0Internal error.
- Worcester Bosch FDMains power error, electrical power interruption.
- Worcester Bosch 9UHCM/code plug problem, faulty or not connected.
- Worcester Bosch b7Internal error, control board fault.
- Worcester Bosch CFWater pressure sensor not connected or short-circuit.
- Worcester Bosch D3External cut-off switch activated.
- Worcester Bosch H5No feedback from pump.
- Worcester Bosch A8EMS communication error.
- Worcester Bosch E4Preheat sensor on hot water inlet short or open circuit.
- Worcester Bosch CCOutdoor sensor defect.
- Worcester Bosch CE 266No pressure variation detected after switching pump.
Checking verified manufacturer coverage…