23
Problem 7
H
ig
h l
lim
it
sw
itc
h i
is
op
en
.
Is f
an loose
or dir
ty?
Ye
s
No
Ye
s
Ye
s
Ye
s
Ye
s
Tight
en f
an wheel set
scre
w(s) t
o mo
to
r
shaf
t. Blo
w f
an with
com
pressed air or
clean with sof
t brush.
Are
there restrictions
at air inlet or
outlets (such as
unappr
ov
ed
ductw
ork)?
Ha
ve
y
ou
check
ed f
or pr
oper
gas type being used, pr
oper pressure, or
for liq
uid pr
opane in
the line?
Check building electrical
syst
em. R
epair as
necessar
y.
See heat
er
dataplat
e f
or correct
voltage.
Is
pr
oper v
oltage
being supplied
to
mo
tor?
Is heat
er
reasonably
clean?
R
emo
ve
restriction.
No
No
No
Giv
e heat
er a
thor
ough cleaning
with a sof
t brush or
com
pressed air
.
DO NO
T USE W
ATER
OR ANY LIQUID
CLEANING A
GENTS.
No
Ye
s
Ye
s
Does mo
tor ha
ve
oil por
ts?
Mo
tor is def
ectiv
e.
R
eplace.
Clean mo
tor housing.
Oil each por
t with
6 dr
ops of SAE 20 oil.
Is mo
tor dir
ty?
No
No
Check f
or pr
oper fuel and pressure on
dataplat
e of heat
er
. Correct as necessar
y.
