Worcester Bosch · Boilers and HVAC
Worcester Bosch Greenstar 1000 gas boiler
Product information, applicable models, official documentation and 109 indexed error-code explanations for Greenstar 1000 gas boiler.
109indexed codes
1named models or series
1official links
About Worcester Bosch Greenstar 1000 gas boiler
Worcester Bosch Greenstar 1000 gas boiler is indexed in the Boilers and HVAC directory for United Kingdom. This page brings the available product context, model references, documentation and diagnostic codes together in one place.
The codes below apply only where the linked code page lists this product or model. Confirm the complete model identifier because manufacturers may reuse the same characters across different ranges, generations and control systems.
An error code describes a condition detected by the product; it does not prove that a named component has failed. Follow the exact manual, avoid repeated resets and use an appropriately qualified technician whenever checks require internal access.
Models and series
Greenstar 1000
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Common Greenstar 1000 gas boiler codes
Frequently useful high-priority and recently documented entries.
2981Worcester Bosch · Greenstar 1000 gas boiler · United KingdomBoiler locked after repeated resetsWorcester Bosch documents code 2981 on the Greenstar 1000 as “Boiler locked after repeated resets”. This is a…2980Worcester Bosch · Greenstar 1000 gas boiler · United KingdomSuper lockout after repeated resetsWorcester Bosch documents code 2980 on the Greenstar 1000 as “Super lockout after repeated resets”. This is a…2974Worcester Bosch · Greenstar 1000 gas boiler · United KingdomInternal faultWorcester Bosch documents code 2974 on the Greenstar 1000 as “Internal fault”. This is a diagnostic condition that…2973Worcester Bosch · Greenstar 1000 gas boiler · United KingdomBoiler electronics or controller system faultWorcester Bosch documents code 2973 on the Greenstar 1000 as “Boiler electronics or controller system fault”. This is…2972Worcester Bosch · Greenstar 1000 gas boiler · United KingdomMains voltage too lowWorcester Bosch documents code 2972 on the Greenstar 1000 as “Mains voltage too low”. This is a diagnostic…2966Worcester Bosch · Greenstar 1000 gas boiler · United KingdomHeat-exchanger flow temperature rising too rapidlyWorcester Bosch documents code 2966 on the Greenstar 1000 as “Heat-exchanger flow temperature rising too rapidly”. This is…2965Worcester Bosch · Greenstar 1000 gas boiler · United KingdomFlow temperature too highWorcester Bosch documents code 2965 on the Greenstar 1000 as “Flow temperature too high”. This is a diagnostic…2964Worcester Bosch · Greenstar 1000 gas boiler · United KingdomHeat-exchanger flow rate too lowWorcester Bosch documents code 2964 on the Greenstar 1000 as “Heat-exchanger flow rate too low”. This is a…
Complete directory
All Greenstar 1000 gas boiler error codes
Showing 1–30 of 109
1010Worcester Bosch · Greenstar 1000 gas boiler · United KingdomNo BUS communicationWorcester Bosch documents code 1010 on the Greenstar 1000 as “No BUS communication”. This is an operating status…1013Worcester Bosch · Greenstar 1000 gas boiler · United KingdomMaximum combustion point reachedWorcester Bosch documents code 1013 on the Greenstar 1000 as “Maximum combustion point reached”. This is a warning…1018Worcester Bosch · Greenstar 1000 gas boiler · United KingdomMaintenance interval expiredWorcester Bosch documents code 1018 on the Greenstar 1000 as “Maintenance interval expired”. This is a warning or…1021Worcester Bosch · Greenstar 1000 gas boiler · United KingdomCylinder or hot-water temperature sensor faultWorcester Bosch documents code 1021 on the Greenstar 1000 as “Cylinder or hot-water temperature sensor fault”. This is…1023Worcester Bosch · Greenstar 1000 gas boiler · United KingdomMaximum run time reachedWorcester Bosch documents code 1023 on the Greenstar 1000 as “Maximum run time reached”. This is a warning…1025Worcester Bosch · Greenstar 1000 gas boiler · United KingdomReturn temperature sensor faultWorcester Bosch documents code 1025 on the Greenstar 1000 as “Return temperature sensor fault”. This is a diagnostic…1068Worcester Bosch · Greenstar 1000 gas boiler · United KingdomOutside temperature sensor or lambda probe faultWorcester Bosch documents code 1068 on the Greenstar 1000 as “Outside temperature sensor or lambda probe fault”. This…1073Worcester Bosch · Greenstar 1000 gas boiler · United KingdomFlow temperature sensor short circuitWorcester Bosch documents code 1073 on the Greenstar 1000 as “Flow temperature sensor short circuit”. This is a…1074Worcester Bosch · Greenstar 1000 gas boiler · United KingdomNo signal from flow temperature sensorWorcester Bosch documents code 1074 on the Greenstar 1000 as “No signal from flow temperature sensor”. This is…200Worcester Bosch · Greenstar 1000 gas boiler · United KingdomBoiler in heating modeWorcester Bosch documents code 200 on the Greenstar 1000 as “Boiler in heating mode”. This is an operating…201Worcester Bosch · Greenstar 1000 gas boiler · United KingdomBoiler in hot water modeWorcester Bosch documents code 201 on the Greenstar 1000 as “Boiler in hot water mode”. This is an…202Worcester Bosch · Greenstar 1000 gas boiler · United KingdomBoiler in anti-cycle modeWorcester Bosch documents code 202 on the Greenstar 1000 as “Boiler in anti-cycle mode”. This is an operating…203Worcester Bosch · Greenstar 1000 gas boiler · United KingdomBoiler in standby with no heat demandWorcester Bosch documents code 203 on the Greenstar 1000 as “Boiler in standby with no heat demand”. This…204Worcester Bosch · Greenstar 1000 gas boiler · United KingdomPrimary water temperature above set valueWorcester Bosch documents code 204 on the Greenstar 1000 as “Primary water temperature above set value”. This is…208Worcester Bosch · Greenstar 1000 gas boiler · United KingdomChimney sweep demandWorcester Bosch documents code 208 on the Greenstar 1000 as “Chimney sweep demand”. This is an operating status…2085Worcester Bosch · Greenstar 1000 gas boiler · United KingdomInternal faultWorcester Bosch documents code 2085 on the Greenstar 1000 as “Internal fault”. This is a diagnostic condition that…213Worcester Bosch · Greenstar 1000 gas boiler · United KingdomTemp difference between supply and return exceeding limitWorcester Bosch documents code 213 on the Greenstar 1000 as “Temp difference between supply and return exceeding limit”.…214Worcester Bosch · Greenstar 1000 gas boiler · United KingdomFan shut down during safety timeWorcester Bosch documents code 214 on the Greenstar 1000 as “Fan shut down during safety time”. This is…219Worcester Bosch · Greenstar 1000 gas boiler · United KingdomSupply or return water too hotWorcester Bosch documents code 219 on the Greenstar 1000 as “Supply or return water too hot”. This is…2207Worcester Bosch · Greenstar 1000 gas boiler · United KingdomLow or missing PWM signal from circulation pumpWorcester Bosch documents code 2207 on the Greenstar 1000 as “Low or missing PWM signal from circulation pump”.…222Worcester Bosch · Greenstar 1000 gas boiler · United KingdomInterruption of the NTC cablingWorcester Bosch documents code 222 on the Greenstar 1000 as “Interruption of the NTC cabling”. This is a…223Worcester Bosch · Greenstar 1000 gas boiler · United KingdomFlow temperature sensor wiring interruptedWorcester Bosch documents code 223 on the Greenstar 1000 as “Flow temperature sensor wiring interrupted”. This is a…224Worcester Bosch · Greenstar 1000 gas boiler · United KingdomSafety temp. limiter has trippedWorcester Bosch documents code 224 on the Greenstar 1000 as “Safety temp. limiter has tripped”. This is a…227Worcester Bosch · Greenstar 1000 gas boiler · United KingdomNo flame signal after ignitionWorcester Bosch documents code 227 on the Greenstar 1000 as “No flame signal after ignition”. This is a…228Worcester Bosch · Greenstar 1000 gas boiler · United KingdomFlame signal detected without a flameWorcester Bosch documents code 228 on the Greenstar 1000 as “Flame signal detected without a flame”. This is…229Worcester Bosch · Greenstar 1000 gas boiler · United KingdomFlame failed during burner operationWorcester Bosch documents code 229 on the Greenstar 1000 as “Flame failed during burner operation”. This is a…232Worcester Bosch · Greenstar 1000 gas boiler · United KingdomBoiler locked by external switching contactWorcester Bosch documents code 232 on the Greenstar 1000 as “Boiler locked by external switching contact”. This is…233Worcester Bosch · Greenstar 1000 gas boiler · United KingdomBoiler identification module or electronics faultWorcester Bosch documents code 233 on the Greenstar 1000 as “Boiler identification module or electronics fault”. This is…234Worcester Bosch · Greenstar 1000 gas boiler · United KingdomGas valve electrical faultWorcester Bosch documents code 234 on the Greenstar 1000 as “Gas valve electrical fault”. This is a diagnostic…235Worcester Bosch · Greenstar 1000 gas boiler · United KingdomConflicting boiler electronics and identification versionsWorcester Bosch documents code 235 on the Greenstar 1000 as “Conflicting boiler electronics and identification versions”. This is…