The Frigidaire Furnace is a high-efficiency heating system designed for residential use, featuring advanced combustion technology, electronic ignition, variable-speed blower motor, integrated diagnostic system, safety controls, and energy-saving operation modes. Below are key sections for safety procedures, technical specifications, installation guidelines, maintenance procedures, troubleshooting, and repair instructions.
Critical safety information for service technicians and installers.
| Hazard | Precaution |
|---|---|
| Electrical Shock | Disconnect power before servicing; use lockout/tagout procedures |
| Gas Leaks | Check for leaks with soap solution; never use open flame |
| Carbon Monoxide | Ensure proper ventilation; test CO levels after service |
| High Temperatures | Allow system to cool before handling components |
| Moving Parts | Disconnect power before accessing blower assembly |
| Combustion Gases | Verify flue pipe integrity and proper drafting |
Proper installation procedures for optimal performance and safety.
WARNING! Installation must comply with local codes and manufacturer specifications. Professional installation recommended.
Major components and their functions within the furnace system.
| Component | Function |
|---|---|
| Heat Exchanger | Transfers heat from combustion to air stream |
| Burner Assembly | Provides controlled combustion of fuel |
| Inducer Motor | Creates draft for combustion gases |
| Blower Motor | Circulates air through duct system |
| Gas Valve | Regulates gas flow to burners |
| Control Board | Manages system operation and diagnostics |
| Igniter | Hot surface ignition for burner lighting |
| Flame Sensor | Detects burner flame presence |
| Pressure Switches | Verify proper draft and venting |
| Limit Switches | Prevent overheating conditions |
Standard operating sequence and control functions.
Recommended maintenance intervals and procedures.
| Interval | Maintenance Task |
|---|---|
| Monthly | Check air filter; clean/replace as needed |
| Seasonal | Inspect vent system; check burner flames |
| Annual | Complete system inspection and cleaning |
| Every 2 Years | Heat exchanger inspection; blower cleaning |
| As Needed | Component replacement per diagnostic codes |
Maintenance Procedures: Clean burners, inspect heat exchanger for cracks, lubricate motor bearings (if required), check electrical connections, verify gas pressure settings.
LED flash codes and their meanings for troubleshooting.
| Flash Pattern | Code | Description |
|---|---|---|
| 1 Flash | Lockout | Ignition failure; check gas, igniter, flame sensor |
| 2 Flashes | Pressure Switch | Pressure switch stuck open/closed |
| 3 Flashes | Limit Circuit | High limit switch open |
| 4 Flashes | Rollout Switch | Rollout switch open; check venting |
| 5 Flashes | Flame Sense | Flame sensed when not called for |
| 6 Flashes | Gas Valve | Gas valve circuit fault |
| 7 Flashes | Blower | Blower circuit fault |
| Continuous | Normal | System operating normally |
Common problems and their solutions.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| No heat | Thermostat, power, gas supply | Check thermostat setting; verify power; check gas valve |
| Short cycling | Dirty filter, limit switch | Replace filter; check airflow; test limit switch |
| Blower not running | Motor, capacitor, control board | Test motor windings; check capacitor; verify control signal |
| Burner won't light | Igniter, gas valve, pressure switch | Test igniter continuity; check gas pressure; verify draft |
| Loud noises | Blower wheel, inducer, heat exchanger | Inspect for obstructions; check bearings; examine heat exchanger |
| Pilot outage | Draft, thermocouple, gas supply | Check venting; test thermocouple; verify gas pressure |
Step-by-step repair instructions for common components.
Common replacement parts and their specifications.
| Part Number | Description | Application |
|---|---|---|
| 5303910526 | Hot Surface Igniter | All FG7 series models |
| 5304443402 | Flame Sensor | Natural gas models |
| 5303910539 | Inducer Motor Assembly | 80% AFUE models |
| 5303910540 | Blower Motor | 1/3 HP, 1075 RPM |
| 5303910541 | Control Board | Universal replacement |
| 5304443403 | Gas Valve | 24V, combination type |
| 5303910542 | Limit Switch | Manual reset, 200°F |
| 5303910543 | Pressure Switch | 0.8" WC setting |
Manufacturer warranty coverage and service procedures.
Service Support: 1-800-374-4432 | www.frigidaire.com/service