Troubleshooting
Guide
26|
Page
CLEANING
THE
COMBUSTION
COMPONENTS
Procedure
for
cleaning
the
fan,
burner,
Flame
Sensor
and
AFR,
as
used
by
all
Service
Representatives.
1)
TOOLS
‐
Gather
the
following
materials
together:
a.
Degreaser
in
a
pump
action
bottle,
Sandpaper,
Philips
Screw
Driver,
Needle
‐
Nosed
Pliers,
Duct
Tape,
Flashlight,
Air
Compressor,
Shop
Vacuum,
3x
Towels
2)
POWER
‐
Disconnect
power
to
your
unit
by
either
unplugging
it
from
the
wall
outlet,
or
by
the
circuit
breaker,
depending
on
the
setup.
3)
GAS
‐
Shut
off
the
gas
supply.
4)
FRONT
COVER
‐
Remove
the
front
cover.
5)
MANIFOLD
PLATE/GAS
VALVE
ASSEMBLY
‐
a.
Remove
the
manifold
plate
screws.
They
are
wide
pan
head
Philips
screws,
located
on
the
edges
of
the
stamped
metal
plate
of
the
gas
manifold
b.
Remove
the
brass
gas
valve
screw.
c.
Remove
the
wire
holding
the
Easy
‐
Link
wires
in
place.
d.
Disconnect
the
clear
plastic
tube
from
beneath
the
combustion
chamber
e.
Gently
lift
up
the
manifold
&
gas
valve
assembly
to
dislodge
it
from
the
gas
inlet,
and
gently
let
it
hang.
i.
There
is
a
small
filter
screen
in
the
bottom
of
the
gas
inlet.
Do
not
lose
it.
Figure
25
Figure
26
