Frigidaire FGHB2844LF7 Refrigerator Service Manual

The Frigidaire FGHB2844LF7 is a 27.8 cu. ft. French door bottom-mount refrigerator with stainless steel finish, featuring automatic defrost, ice and water dispenser, and ENERGY STAR® certification. This service manual provides technical data, diagnostics, wiring diagrams, component testing, and parts information for qualified technicians. Always disconnect power before servicing. Refer to the service data sheet for detailed procedures. Below are the key sections.

Safety and General Information

• Caution: All electrical parts and wiring must be shielded from torch flame. Do not allow torch to touch insulation; it will char at 200°F and flash ignite at 500°F. Excessive heat will distort the plastic liner.
• Power: 115 VAC (127 VAC max); grounded outlet required.
• Refrigerant: R134a; automatic defrost, bottom freezer with ice & water.
• Safety Note: Information for qualified repair personnel only. Disconnect power cord before servicing. Return green grounding wires to original position if removed.
• Important: Check for pinched or damaged wires before replacing components. Contact TID before replacing main control board.

Performance Data

• Conditions: No load, no door openings at 37°F/0°F control setting. Type A with run/start capacitor.
• 65°F (18°C) Ambient:
  • Operating Time: 90-100%
  • Freezer Temp: -5° to 2°F (-20° to -17°C)
  • Refrigerator Temp: 34° to 39°F (1° to 4°C)
  • Low Side Pressure: -2 to 6 psig (-14 to 41 kPa)
  • High Side Pressure (last 1/3 cycle): 85-105 psig (586-724 kPa)
  • Wattage (last 1/3 cycle): 30-50
  • Amps (running): 0.4-0.8
• 90°F (32°C) Ambient:
  • Operating Time: 100%
  • Freezer Temp: -1° to 3°F (-18° to -16°C)
  • Refrigerator Temp: 34° to 39°F (1° to 4°C)
  • Low Side Pressure: -2 to 6 psig (-14 to 41 kPa)
  • High Side Pressure (last 1/3 cycle): 120-135 psig (827-931 kPa)
  • Wattage (last 1/3 cycle): 50-70
  • Amps (running): 0.7-0.9

Defrost System Specifications

• Cabinet Size: 27’ & 28’ SD, 22’ CD
• Thermal Cutout: 110°F (43.3°C) cut-in, 135°F (57.2°C) cut-out
• Freezer:
  • Heater: 500 Watts
  • Defrost Thermistor: 26.5 Ohms
  • Termination Cut-out: 48°F (8°C)
• Fresh Food Ice Maker:
  • Heater: 70 Watts
  • Defrost Thermistor: 188.9 Ohms
  • Termination Cut-out: 68°F (20°C)
• Electronic Timer (ADC): Defrost 24 minutes every 6-96 hours of compressor run time.

Component Ratings and Testing

• Condenser Fan Motor: 3.1 Watts, 1100 RPM CW opposite shaft, 0.03 Amps running
• Freezer Ice Maker: 115 VAC (127 max); Thermostat opens at 48°F (9°C), closes at 15°F (-9°C); Heater 115 VAC
• Ice Maker Mold Heater: 165 Watts
• VCC Compressor Motor Resistance: Check between terminals 1-2, 2-3, 3-1; equal resistances indicate operative. If failed, check inverter board, 10-15 VAC/1-5 VDC signals, 115 VAC supply.

Diagnostic Modes and Error Codes

Error Codes

• OP (FZ/FF): Open FF/FZ Cavity Thermistor
• SH (FZ/FF): Shorted FF/FZ Cavity Thermistor
• SY CF: UI to Main Board communication failure (on startup)
• SY CE: UI to Main Board communication error (after operation)
• SY EF: Freezer Evaporator Fan Failure
• dl SP: Ice Chute Door open (check obstruction)

Diagnostic Modes

• Activation: Press ^ and v for up to 10 sec. Press + to advance tests. Deactivate: Hold + for 10 sec. or after 5 min inactivity.
• Tests Include: Dispenser Paddle (28: On/Off), Humidity Sensor (46: OP/SH/%RH), Dispenser Pocket Heater (47: On/Off), Freezer Defrost Heater (2: On/Off, temp flash), Water Valve (8: On/Off), Auger Motor (10: On/Off), Cube/Crush Solenoid (11: On/Off), Condenser Fan (12: On/Off), Mullion Heater (43: On/Off), Compressor (38: On/Off), FF Lights (13: On/Off), Evap Fan (15: Off/LO/HI, current flash), FZ Lights (20: On/Off), and more.

Wiring Diagrams Summary

Refer to Wire Diagram A06742101 for full schematic. Key connections:

• Power: Non-ribbed (LINE), Ribbed (NEUTRAL)
• Compressor: 9-pin MC1; signals from Main Board MB1
• Sensors: Freezer/FF/Evap to MB1; Ambient Thermistor to J8
• Fans: Condenser (RL3), Evap DC (MB1 pins 1-3)
• Valves: Dispenser (RL6), Icemaker (12 VDC)
• Heaters: Defrost (RL2), Mullion (test 43), Ice Maker (test 26)
• Doors/Switches: FF/FZ Door (tests 23/24: CL/OP)
• Connectors: AT1 (Air Tower), IM1/IM2 (Ice Maker), LH1/LH2/RH1/RH2/RH3 (Hinges), MB1/MB2 (Main Board)
• Grounds: Cabinet Wrapper, Base Plate (GRN/YEL)

Troubleshooting

• Not Cooling: Check power, controls, seals, vents; ensure level. Test compressor signals and resistances.
• No Ice/Water: Verify water supply, filter, valves (test 8); ice maker thermostat and heater.
• Defrost Issues: Check thermistor (26.5/188.9 Ohms), heater (500/70W), timer (6-96 hrs).
• Noisy: Normal fan/compressor; level unit; inspect loose parts.
• Error Codes: Diagnose per codes; check thermistors (OP/SH), communication (SY CF/CE), fan (SY EF).
• Door Problems: Test switches (23/24: CL/OP); adjust hinges.
Note: Refer to diagnostic tests for component verification. Contact Frigidaire at 1-800-374-4432 for persistent issues.

Parts List

• WATER FILTER, PS ULTRA SYSTEM (PS12366457 / ULTRAWFC): $124.39, Special Order
• Screw - Kit of Four (PS12365992 / 5304515677): $14.91, In Stock
• Upper or Lower Mullion Hinge Pin (PS2358752 / 241779401): $25.88, In Stock
• Ice Maker Assembly (PS16221322 / 243297613): $93.69, In Stock
• GASKET-DR, MAGNETIC FF WH 36 (PS17990263 / 241778315): $75.40, In Stock
• Door Bin - Clear (PS3497801 / 242079701): $76.37, In Stock
• Evaporator Fan Blade (PS473177 / 5308000010): $47.82, In Stock
• Screw (PS1525803 / 218755504): $21.89, In Stock
• Refrigerator Light Bulb (PS12712277 / 5304517886): $55.65, In Stock
• GASKET, FREEZER DRAWER, GREY (PS17996096 / 5304537408): $63.47, In Stock
• Adjustable Leveling Foot - Black (PS425733 / 216396900): $32.86, In Stock
• Hexagonal Screw (PS1526503 / 241710601): $21.89, In Stock