Therma Grow™ Greenhouse Heaters
www.lbwhite.com
Owner’s Manual • Therma Grow™
24
LED Constant On
Normal Operation
HE
ATING MODE
Problem
LE
D
L
ig
ht
N
ot
O
n
Is p
roper
voltage
supplied
to
h
ea
ter?
Is selec
tor switch
set
to HE
AT?
Check data pla
te
fo
r
electrical supply
re
quirments.
Pr
ovide p
rope
r
voltage, contact
electricia
n.
Ye
s
No
Ye
s
Ye
s
Ye
s
De
fecti
ve wire or
electrical connection.
Reapir or replace.
Is
thermostat
de
fecti
ve? Check
for
continuit
y.
Are
24
volts
supplied
to ignition
cont
rol
terminal W
from thermostat?
Replace thermostat
Is hea
te
r
connec
ted
to
po
w
er supply?
No
No
No
Ye
s
Position selec
to
r
switch
to HE
AT
.
Ensure hea
ter is
connec
ted
to
p
ow
er
suppl
y. Check
brea
ke
rs
Is p
roper
voltage
deli
vered
to
selec
tor switch?
Check all wiring
fo
r
de
fects.
Repair or
repalce if needed.
Ye
s
Does selec
to
r
switch send voltage
to the
trans
former?
Check
voltage
output at switch terminals. If no voltage, rep
lace
switch.
Ye
s
No
No
No
Does trans
former
recei
ve
v
oltage
from switch?
Check wiring
fo
r
continuity bet
w
ee
n
trans
former and
switch.
Repair or
replace
No
Ye
s
Ye
s
Does trans
former
reduce incoming
voltage
to
2
4
volts?
De
fecti
ve trans
forme
r.
Relace trans
forme
r.
No
Is
24
volts
deli
vered
to
thermostat?
Check wiring bet
w
ee
n
trans
former and
thermostat. Check continuit
y.
Repair as
needed.
No
Ye
s
Ye
s
Is
thermostat set ab
ov
e
ro
om
te
m
perature?
Set thermostat
ab
ov
e
ro
om
te
m
perature.
No
De
fecti
ve
ignition cont
rol.
Plus Mode Only