L.B. White 400 Tradesman Portable Forced Air - Manual (Page 20)

TRADESMAN U
L
TRA HEATER
19
Problem LED Flashing
Is air pr
o
ving
switch shor
ted?
(Check continuity on air pr
o
ving switch in
open and closed
positions).
Ye
s
If air pr
o
ving switch is jumered,
remo
v
e
jum
per and ret
est.
If switch e
xhibits shor
t, replace the
switch.
One Time Air proving switch contacts are closed before fan motor starts. \.
Is air pr
o
ving switch
stuck closed?
Check continuity
.
Is air pr
o
ving switch
binding?
R
epair
.
No
No
R
eplace air pr
o
ving switch
Ye
s
Ye
s