Worcester Bosch · Greenstar 2000 Combi
2964 boiler fault code
Greenstar 2000 Combi
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What 2964 means
Flow rate in heat exchanger too low
Safe check
Note the displayed code and contact a Gas Safe registered engineer.
When to contact an engineer
Contact a Gas Safe registered engineer to investigate this fault.
Safety notice
A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, anyone feels unwell, or there is an unsafe flame, leave and call 0800 111 999 from outside.
Source and provenance
- Worcester Bosch Greenstar 2000 Installation, Commissioning and Servicing Instructions (2023/06) · §11.2, code 2964, printed p. 87 · document 6721839340
installation, commissioning and servicing instructions
2023/06 · document 6721839340