Service Manual
Table Of Contents
- Cover Page
- Section 0 (Table of Contents)
- Section 1 (Introduction)
- Section 2 (Sealed System)
- Section 3 (Sealed System Components)
- Section 4 (Electrical Component Access)
- Section 5 (User Interface Display)
- Section 6 (Control System)
- Section 7 (Lights, Doors, Drawer, and Hinges)
- Section 8 (Evaporator Compartment Access)
- Section 9 (Wiring Diagrams)
- Section 10 (Power On reset Mode)
- Section 11 (Quick Reference Troubleshooting)
- Section 12 (Diagnostic Flow Charts)
- Section 13 (Gathering Service Data)
- Section 14 (Beer Dispenser)
- Section 15 (Dual Zones)
- 15.1: User Interface Control
- 15.2: Operation
- 15.3: Characteristics
- 15.4: Dual Zone Compartment Air Flow
- 15.5: Divider Removal
- 15.6: Damper Operation
- 15.7: Compartment Fan Operation
- 15.8: Heater Operation
- 15.9: Thermistors
- 15.10: Evaporator Access
- 15.11: Interior LED’s
- 15.12: Defrost / Drip Time
- 15.13: Refrigeration and Mechanical
- Section 16 (Refrigerator Freezers)
- Section 17 (Outdoor Models)
- 17.1: Operation
- 17.2: Characteristics / Differences
- 17.3: Fans
- 17.4: Thermistors
- 17.5: Control Type
- 17.6 : Control Functions
- 17.7: Control Locations per Model
- 17.8: Machine Compartment
- 17.9: Main Power Board Access
- 17.10: Display Access and Replacement
- 17.11: Thermistor Resistance
- 17.12: Wiring Diagram
- 17.13: Generic Trouble shooting Charts
- 17.14: Refrigeration and Mechanical
- Section 18 (Prime Control)
- Section 19 (Clear Ice Machines)
- Section 20 (Service Kits / Bulletins)
- 20.1: Service Bulletin # 41013862Mullion Condensation on Refrigerated Drawers
- 20.2: SERVICE BULLETIN # 41013861EVAPORATOR REPLACEMENT KIT
- 20.3: SERVICE BULLETIN # 41013995 Rev CContact between the Door and Door Sensor
- 20.4: SERVICE BULLETIN # 41014167Slotted Condenser Shroud
- 20.5: SERVICE BULLETIN # 41014168Showroom Mode Alarm
- 20.6: SERVICE BULLETIN # 41014169Evaporator / Heat Exchanger Replacement(RF and RFI Models ONLY)
- 20.7: SERVICE BULLETIN # 41014241Shelf Shim Kit
- 20.8: Service Bulletin # 41014242Miscellaneous Control Communication Errors
- 20.9: Service Bulletin # 41014243Replacement of MP Door Skins
- Section 21 (Customer Service Contact Information)
- Section 22 (Notes)
- Back Page
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15.8: Heater Operation
The heater controls return air to circulate into the upper compartment to
maintain desired set point temperature.
A call for cooling in the upper (warmer) compartment opens both damper doors
and disables the heater.
A call for heat in the upper (warmer) compartment closes both damper doors
and enables the heater.
The heater is disabled when the ambient thermistor senses a temperature
excessive to 85°F.
o This prevents excessive compartment temperatures.
To access the heater (upper compartment) remove the 5 screws securing the rear panel cover.
Once this is done, remove the metal wire cover to access the fan connector. Once disconnected
the rear panel can now be removed from the compartment.
Upper Compartment Heater: Used to control and
maintain the temperature of the upper zone.
A replacement heater will appear as
seen to the left. The heater will come
attached to a replacement bracket.