26
Pr
ob
le
m
88
B
ur
ne
r
do
es
no
t
sh
ut
of
f
w
he
n
te
m
pe
ra
tu
re
re
qu
ire
m
en
t
is
s
at
is
fie
d.
Does
thermostat
shut of
f within
1
.6° C of
set point?
Ye
s
No
Debris is lodged in seat of gas contr
ol v
alv
e. R
eplace entire v
alv
e.
R
eplace thermostat.
Pr
ob
le
m
99
Fl
am
e
“l
ift
in
g”
o
ff
of
b
ur
ne
r.
Has gas
pressure been
check
ed?
Ye
s
No
Ye
s
Are there
block
ages in
burner casting,
burner orif
ice or primar
y
air inlets of
casting?
Clean with com
pressed air
.
Check f
or pr
oper pressure t
o
inlet of heat
er and also f
or
pr
oper burner manif
old
pressure.
Pr
ob
le
m
11
0
B
ur
ne
r
fla
m
e
dr
op
s
ou
t
af
te
r
1
0
-
1
5
m
in
ut
es
o
f
op
er
at
io
n.
Is
gas supply line and tank
pr
operly sized?
Ye
s
No
See pr
oblem 3 and 6.
R
esize line and reselect
larger tank size if necessar
y.