GE PGCS1R User Manual page 58

Heater Basic Operation
Duct Port heater - cycles based on temperatures and ice box condition. (Ex: mid –mid settings
appx 30% on time.) Located around the holes for ice door.
Supply Duct heater - come on with abnormally high door opening time and high room humidity
Air Duct heater (abnormal is appx. 70 FF openings for 12 sec. or more in 16 hours)
Door Gasket heater - are on all of the time with a FZ setting of 4 or lower. Above that varies.
Recess
Duct door
Fill Tube heater - on for 2 hours after water valve activation or when ice is dispensed.
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