21
Pr
ob
le
m
22
Pi
lo
t ww
ill
no
t ss
ta
y l
lit
w
he
n p
pi
lo
t
co
nt
ro
l
bu
tt
on
iis
re
le
as
ed
.
Is LP
gas container
full?
Ye
s
No
Ye
s
Ye
s
Ye
s
Ye
s
Did
you allo
w
suf
ficient time
to
allo
w thermo-
couple w
arm
up?
Is
thermocouple contact nut
tight?
Is
thermocouple
pr
operly positioned in
pilo
t brack
et?
Fill container if lo
w
.
Allo
w 30 - 60 seconds w
arm up bef
ore
releasing pilo
t butt
on.
Snug nut in place. (Do
no
t o
ver
tight
en.)
Check f
or debris
betw
een contact of
thermocouple and
electr
omagnet of v
alv
e.
Pilo
t flame should
im
pinge on 1/2 - 3/8 in. of thermocouple tip.
Disassemble and
clean with
com
pressed air
. Do
no
t use point
ed
instruments.
R
eplace pilo
t orif
ice
if necessar
y.
Is
pilo
t assembly
,
including orif
ice,
clean?
Are
pilo
t line
or gas supply hose par
tially
plugged?
Ye
s
R
emo
ve
and clean with
com
pressed air
.
No
No
No
Check f
or pr
oper
pressure t
o heat
er
inlet. R
ef
er t
o
heat
er dataplat
e.
R
eplace with
pr
oper pilo
t orif
ice.
No
No
Check milliv
olt
output. 1
0
MV or
great
er is acceptable.
R
eplace
thermocouple if less
than 1
0
MV (with
burner of
f).
No
Ye
s
Is pr
oper pilo
t
orif
ice installed?
Ye
s
Has
thermocouple strength been check
ed with
test
er?
Ye
s
Has dr
op
out of electr
omagnet
on pilo
t saf
ety contr
ol
been check
ed?
Is
pr
oper gas
pressure supplied
to
heat
er?
No
No
Check milliv
olt dr
opout. 4 MV or
less is pr
oper
. Ov
er 4 MV is w
eak
valv
e. R
eplace entire v
alv
e.
No
