If there is no reading, the possibilities are a) AC
supply not connected, b) 3 Amp fuse blown, c)
wiring connections, or d) defective switch or
thermostat. Proceed to Step 2.
If voltage is measured (108-132 volts), then the
heater or the wiring to the heater is defective or
the heater is not positioned properly in the heater
well. Proceed to the Continuity test in Step 4.
2. If no heater voltage is measured, disconnect the
AC supply cord and measure the voltage at the
AC receptacle. If no reading, determine why the
power is not connected. If voltage is present,
check fuse in next step.
3. Without reconnecting the AC supply cord, check
condition of the 3 Amp fuse (should be 0 Ohms
using an Ohmmeter set at lowest scale); replace
if necessary and repeat Step 1 to insure there is
no secondary problem. If fuse blows a second
time, go to Step 4 since it indicates either a
shorted heater or a grounding fault.
NEVER OVER FUSE A CIRCUIT. REPLACE
BLOWN FUSE WITH EXACT REPLACEMENT IN-
DICATED BY NORCOLD. OVER FUSING OF A
CIRCUIT CAN RESULT IN A FIRE.
If the fuse is good (and still no voltage to the
heater), the problem is an open circuit either in
the Control Assembly or the interconnecting wir-
ing. Using the wiring diagram and Figure 4 as
reference, check the wiring for loose connec-
tions or incorrect connections. If a check of wir-
ing proves OK, either the Thermostat or the Se-
lector Switch has an open circuit. Isolate the
open circuit as follows:
a. With the AC cord disconnected, unfasten the
Control Assembly and lay back to view the
control wiring - See the first four steps of the
selector switch removal procedure on page
12-20. Without removing any wires, place a
jumper across terminals W1 & W2 as illustrated
in Figure 5. Make sure the jumper is making
contact with the copper wire of metal terminal.
Note: Access to the terminals can be gained
by probing through the end of the Quick
Connectors as shown in the illustrations.
If the AC heater is now energized when
power is applied, replace the Thermostat. If
not, remove jumper and go to (b).
b.
b. With the AC cord disconnected, lay back
the Control panel as described in Step (a) and
place one jumper from AC2 to W2 and an-
other jumper from AC1 to W1 according to
Figure 6. If AC is now energized when power
is applied, replace the Selector Switch per re-
placement procedure on page 12-20.
4.
WARNING
GAS-AC-DC
Selector Switch
Figure 4 - Wiring Connections to Selector Switch
GAS-AC-DC
Selector Switch
Figure 5 - Thermostat Jumper Connection
GAS-AC-DC
Selector Switch
Figure 6 - Selector Switch - Jumpers on AC Section
8
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