L.B. White Oval 80™ Radiant - Manual (Page 26)

Tw
o Times
Di
ffe
ren
tia
l ai
r
pr
essu
re
sw
itc
h
con
ta
ct
s
ha
ve
no
t c
lose
d.
In
di
ca
tes
no
ai
r
pr
ov
ing
in
fa
n
sec
tion
of
h
ea
te
r
Is
pressure switch
stuck open? Check
continuity
.
Ye
s
No
Is
fan loose on
mo
tor shaf
t or
block
ed with
debris?
Ye
s
Tight
en f
an set scre
w
. Clean
the f
an wheel.
Is
pr
oper
voltage supplied
to
fan mo
tor?
No
Ye
s
Def
ectiv
e mo
to
r.
R
eplace mo
tor
Is
ignition module receiving pr
oper
voltage?
No
Def
ectiv
e ignition module.
R
eplace module.
Ye
s
Def
ectiv
e wiring or
connections t
o mo
to
r.
R
epair or replace
wiring and connections
No
Pr
ovide pr
oper v
oltage.
Check electrical supply
,
cir
cuit break
er
s, etc.
Is
pr
oper
voltage supplied
to
heat
er?
Ye
s
No
R
ed
LED
F
la
sh
in
g
One Time Di
ffe
ren
tia
l ai
r
pr
essu
re
sw
itc
h
con
ta
ct
s
ar
e
cl
ose
d
befo
re
fa
n
mo
to
r
st
art
s.
Is pressure switch
stuck closed?
Check continuity
.
Ye
s
No
R
eplace air
-pr
oving switch
Def
ectiv
e wire or loose connection
to
air pressure switch. R
epair as
needed
Check f
or an
y block
ages at the air inlet’s
rigid and fle
x tubes t
o the burner bo
x.
Ensure copper or clear pressure switch tubes are no
t plugged or kink
ed.
Check dif
ferential air pressure orif
ices.
If plugged, clean with air pressure. Pressure switch out of calibration, replace pressure switch. Vent cap is stuck in closed position.
26
Is
burner bo
x
gask
eting t
orn, or
missing?
No
Ye
s
R
eplace burner bo
x
gask
eting. Ensure pr
oper
sealing of all burner bo
x
com
par
tments.
No