What the manual says
Manufacturer manualAutomatic test programme: Return temperature sensor, heating demands blocked.
From this model's manual
Verified against the Glow Worm/Glow Worm Energy7 Regular installation & service manual, page 40.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Related fault codes
All 79 fault codes on the Energy7 Regular
Seeing a different code? Every code this model can display, in one place.
Connectiond.02d.94F.00F.01F.10F.11F.13F.20F.23F.24F.25F.27F.28F.29F.32F.49F.61F.62F.63F.64F.65F.67F.68F.70F.71F.72F.77F.78F.83F.84F.85F.86F.87F.88F.91F.97P.01P.02P.03P.04P.05P.06P.07P.10S.0S.01S.02S.03S.04S.05S.06S.07S.08S.20S.21S.22S.23S.24S.25S.26S.27S.28S.30S.31S.32S.34S.39S.42S.46S.53S.54S.88S.91S.98S.99S.108S.109