Replace the
on/off rocker
switch
Yes
Connect 115
VAC to
steamer.
No
Is the red light on
in the on/off
switch?
Is there 115 VAC
to the steamer?
Is there water in
the sight glass?
Yes
See
Steamer won't
fill.
No
Yes
PROBLEM:
24CGP10 Boiler
won't build
pressure
No
Boiler won't build
pressure
Is the red "Low
Water" light on?
Yes
Is the red "Low
Water" light on
with a jumper from
terminals LOW
and C on the water
board?
Replace the
water board.
Is the Amber light
on in the reset
switch?
No
Is there 120 VAC
between
terminals L2 and
HTR on the water
board?
Yes
Repair
or Replace the
probe circuit.
No
Is there 120 VAC
between terminals
L2 and HTR on the
water board with a
jumper between
LOW and C?
Is there 120 VAC
to the Reset
switch?
Repair
or Replace the
probe circuit.
Replace the
water board
Replace the
Reset switch
Yes
After depressing
the reset switch,
does the Amber
light go off?
With the High
Limit pressure
switch
temporarily
bypassed, does
the Amber light go
off when the reset
switch is
depressed?
No
Yes
No
Replace
the high limit
pressure
switch
Replace the R1
relay.
Is there 120 VAC
to the primary of
the 24 VAC
ignition
transformer?
No
Yes
Replace the R1
relay
No
Yes
Is there 120 VAC
to the primary of
the ignition
transformer with
the operating
pressure switch
temporarily
bypassed?
No
Replace the R1
relay
Replace
the operating
pressure
switch
Is there 24 VAC at
the secondary of
the transformer?
Yes
Is there flame at
the burner?
With
flame and water the
Boiler is making
steam. Check for
leaks.
Is there allot of
steam coming out
the drain?
Yes
Replace the
steam trap
Yes
No
See
Boiler
won't ignite.
No
Replace the
ignition
transformer
No
No
Yes
No
Yes
No
Yes
Is there 24 VAC at
ignition module?
Yes
Is the blower
turning?
Replace the air
prover switch
No
Yes
Is there 120 VAC
to blower ?
No
Replace the
blower
Yes
Is there 24 VAC to
coil of R2?
No
Replace float
switch
Replace R2
relay
No
Yes
Yes