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23
Pr
ob
le
m
33
O
ut
er
C
om
bu
st
io
n
C
on
e D
D
oe
s
N
ot
HH
ea
t UU
p
on
HH
ig
h
Th
er
m
os
ta
t
S
et
tin
g.
Is Pr
oper
Gas Pressure Being
Supplied t
o the
Heat
er?
Check f
or Pr
oper Gas
Pressure t
o the Heat
er
.
Pr
oper Pressure at High
Heat Should R
ead 5 PSIG.
Ye
s
No
Is Secondar
y
Orif
ice Plugged?
R
emo
ve
Orif
ice and
Clean It.
Ye
s
No
A.
R
emo
ve
Thermostatic Head fr
om
Thermostatic V
alv
e Body
. If Out
er
Cone Lights, R
eplace Thermostatic
Head and Sensor Assembly
.
-- OR --
B.
If Out
er Combustion Cone still does
no
t Light, A
djust Pressure V
alv
e
Accor
ding t
o Instructions in Owner’s
Manual.
-- OR --
C.
R
eplace Thermostatic Head
Valv
e Body
.
Are There
Block
ages in
Gas Hose, Piping,
Tubing Assembly
, Inject
or
Body or V
enturi
Tube?
R
emo
ve
the Com
ponent
and Clean It.
Ye
s
No