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Worcester Bosch Greenstar Ri Boiler

Including: All Variants

Find Your Error Code

Error Code: No light


Cause: No power at control board. Difficulty: 1 2 3 4 5 Engineer: Required Solutions To Try: Engineer to check power supply to boiler. Check fuses on PCB.




Error Code: Light on


Cause: Appliance on but not operating during demand. Difficulty: 1 2 3 4 5 Engineer: Required Solutions To Try: Will require an engineer to run tests on your pump. It is not recommened you try and free it yourself. Pump will need testing.




Error Code: Slow flash ( mostly off flashes on)


Cause: Ignition lockout. Difficulty: 1 2 3 4 5 Engineer: Required Solutions To Try: Engineer to test gas supply and check valves. Check ignition probes and leads.




Error Code: Slow flash ( mostly on flashes off)


Cause: Flue overheat or heat exchanger overheat. Difficulty: 1 2 3 4 5 Engineer: Required Solutions To Try: Site visit required.




Error Code: Fast flash


Cause: Volatile lockout sensor fan or code plug. Difficulty: 1 2 3 4 5 Engineer: Required Solutions To Try: Engineer to test fan, harness and leads.




Error Code: 2 pulses


Cause: Service mode. Difficulty: 1 2 3 4 5 Engineer: Required Solutions To Try: Service option for engineer.




Error Code: 5 pulses


Cause: Service mode. Difficulty: 1 2 3 4 5 Engineer: Required Solutions To Try: Site visit required.





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  • Most Problems Fixed on Site

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  • 8.30am - 4.30pm

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RP Plumbing & Heating

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