REPLACEMENT OF PARTS
9. Access to boiler control components
Remove 3 screws (A) and remove cover
from control.
10. PCB fuse
Remove fuse F1 (B) from the PCB and
replace.
There is a spare fuse clipped into the
underside of the electrical cover.
11.Transformer / PCB
Disconnect all electrical connections from
the control.
Remove 5 screws (D) retaining the rear
panel of the control and remove panel.
9
10
11
A
B
C
C
REPLACEMENT OF PARTS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 25Si/30Si
8 716 107 337b (11/05)
43
SER
V
IC
IN
G
&
SP
A
RES
Spare Fuse order
T1.6L 250V F2
T2.5H 250V F1
T500L 250V F3
