GE PFSS5NJWSS User Manual page 38

• The heaters operate with 120 VAC and each heater has an approximate
resistance value of 440 ohms. The heaters are in a parallel circuit consisting
of 2 duct heaters, icemaker fill tube heater, and the defrost heater. The line
voltage wires of the duct heaters and the fill tube heater are connected to
the blue wire of the defrost heater. The neutral wires of the heaters go
through the over temperature thermostat. The 2 duct heaters and the fill
tube heater are energized (along with the defrost heater) during the
defrost cycle when the over temperature thermostat is closed.
Return Duct Heater Test
If open duct heaters are suspected, perform the following:
1. With the defrost thermostat closed, test for approximately 27 ohms (the
equivalent resistance of this parallel circuit) between J9 and J7-9 . For a
resistance reading other than approximately 27 ohms, verify the operation
of the defrost heater. (See Troubleshooting)
2. Test the icemaker fill tube heater for approximately 2644 ohms. (See
Icemaker Fill Tube Heater.)
mabe CONFIDENTIAL AND PROPRIETARY INFORMATION-NOT FOR PUBLIC DISCLOSURE.
Return Duct Heaters (cont.)
38
January 2008