Section 13 - Back-Up Operating System
If the thermistor becomes inoperable, the power board will revert to the Back-Up Operating System. When the refrigerator
enters this mode the thermistor is ignored and the refrigerator interprets the thermostat setting as a duty command.
Corrective Action
Replace Lamp/Thermistor Wire Assembly
Section 14 - AC Heater Failed Open
AC voltage being supplied to AC heater but the heater is not drawing current.
Corrective Action
1.Measure the resistance through the AC heater. An open heater reads infinity and requires replacement.
2. If AC heater is not found open, replace power board.
Section 15 - Flame Sense Circuit Failure
Corrective Action
1. Check for cracks or breaks in the sense/ignition wire. Replace when cracks or breaks are found.
2. Check alignment of electrode. Adjust to 1/8" to 3/16 " from top of burner.
2. Check the sense/electrode wire for continuity. Replace if no continuity found.
3. Check the sense/ignition wire for short to ground. Any reading, replace sense/ignition wire.
4. Check ignition wire connection at power board. Secure connection if loose.
5. Replace power board.
Section 12 - 3 Way Models Only - DC Heater Failed Open
Corrective Action
1. Measure the resistance through the DC heater. An open heater reads infinity and requires replacement.
2. Check all wire connections. If wire connections are secure and DC heater is not found open, replace power board.
Section 16 - AC Heater Failed for Current Out of Tolerance
Corrective Action.
Check AC heater for correct wattage (300 Watt) and measure resistance of the heater. The heater is to measure between
38.3 and 42.3 Ohms. Replace if resistance is not within specifications.
Section 17 - DC Heater Failed for Current Out of Tolerance
Corrective Action.
Check DC heater for correct wattage (225 Watt) and measure resistance of the heater (page 31). The heater is to measure
between .83 and .91 Ohms. Replace if resistance is incorrect.
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