ℹ
info Worcester
Status Siphon filling program active
Service function — appliance is in siphon fill mode during initial startup to fill the condensate trap.
? What Causes This
Normal operation during appliance power-up; the appliance runs at minimum heat output for 15 minutes.
ⓘ What This Means
No action required. This is a normal startup procedure. Wait 15 minutes for siphon fill mode to complete.
Source: page 9 of the official manual
From the manual
This error code appears in:
Worcester Greenstar 1000 GR1000W 30C NG Boiler