Bosch GWH 10-2 G Series Installation Manual And Operating Instructions page 19

Problem
Digital display shows "EA".
Digital display shows "F0".
Digital display shows "F7".
Reduced water flow.
Table 7
6 720 608 992 (2021/02)
Cause
There is spark but the main burner does
not ignite, heater blocked.No ionisation
probe signal.
Power was activated with a hot water tap
running.
False Flame.
Insufficient water supply pressure.
Dirty taps or mixers.
Gas valve blocked.
Heat exchanger blocked (limescale).
Solution
Check:
• Gas supply, position of valves, empty
LP gas cylinders.
Turn the water off and on. If the problem
persists, call a qualified technician.
Check for water tightness of flue.
Ensure no rain ingress.
Call a qualified technician.
Call a qualified technician.
Call a qualified technician
Call a qualified technician
Call a qualified technician
Problems
19