L.B. White 170 Premier - Manual (Page 24)

24
Gas control status light is not on.
Is
ignition contr
ol
sending out 2
4
v
olts
fr
om t
erminal MV on contr
ol?
Ye
s
Def
ectiv
e ignition
contr
ol. R
eplace
contr
ol. No
Is
high limit at f
an
end receiving 2
4
v
olts fr
om
ignition contr
ol?
No
Ye
s
Def
ectiv
e wire or
terminal connection. R
epair or replace as
needed.
Is
high limit at f
an
end deliv
ering
2
4
v
olts t
o
high limit
at burner end?
No
Ye
s
Is high limit
at burner end
receiving 2
4
v
olts?
No
Def
ectiv
e wire or
terminal connection. R
epair or replace as
needed.
Is
high limit
at burner end
deliv
ering
2
4
v
olts t
o
gas
contr
ol? No
Is
gas contr
ol
v
alv
e receiving
2
4
v
olts?
No
Ye
s
Ye
s
Ye
s
Is
light receiving
2
4
v
olts?
No
Def
ectiv
e wire or t
erminal
connection. R
epair or
replace as needed.
Ye
s
Def
ectiv
e light,
replace the light.
Def
ectiv
e wire or
terminal connection. R
epair or replace as
needed.
If high limit switch is tripped,
firmly depress the switch reset
butt
on. Check continuity
.
Det
ermine cause of high limit
opening.Check f
or pr
oper gas
pressure, block
ages at air inlet
or w
arm air discharge, kinks in
ducting.
If high limit switch is tripped,
reset the switch. Check
continuity
. Det
ermine cause of
high limit opening. Check f
o
r
pr
oper gas pressure
block
ages at air inlet or w
arm
air discharge, kinks in ducting.