L.B. White 400 Tradesman Portable Forced Air - Manual (Page 19)

Red
L
ight Constant On
L
ED light
not on
Normal Operation
Does f
a
n
mo
tor run?
Ye
s
Ye
s
Does heat
er
light?
LED light def
ectiv
e
R
eplace LED
Is thermostat
set abo
v
e
r
oom
te
m
perature?
Set thermostat
abo
v
e
r
oom
te
m
perature.
Is pr
oper v
oltage
supplied t
o
heat
er po
w
e
r
cor
d?
Check e
xt
ension cor
ds and
cir
cuit break
er
s. R
epair
e
xt
ension cor
d, reset break
er
,
or call q
ualif
ied electrician.
No
18
Problem
Def
ectiv
e
Ignition Contr
ol
Does thermostat
receiv
e pr
oper
v
oltage fr
om
po
w
er cor
d?
Does thermostat
send pr
oper
v
oltage t
o
ignition contr
ol?
Check f
or pr
oper v
oltage
deliv
ered fr
om thermostat t
o
cir
cuit boar
d.
If electrical connections are
good, replace thermostat.
Ye
s
Y
e
s
Ye
s
No
No No
No