Installation Guide
Tools Needed:
- Manifold gauge set
- Vacuum pump
- Tubing cutter
- Torch kit with nitrogen regulator
- Multimeter
- Level
- Screwdrivers (flat and Phillips)
Step-by-Step Installation
- Choose Installation Location: Select a location with proper clearance for service access and airflow on a solid, level surface.
- Remove Shipping Materials: Remove all shipping bolts, packaging materials, and protective covers from both indoor and outdoor units.
- Install Refrigerant Lines: Connect refrigerant lines between indoor and outdoor units using proper brazing techniques with nitrogen purge.
- Electrical Connections: Connect to properly sized circuit breakers according to local electrical codes. Furnace requires 120V, AC unit requires 240V.
- Ductwork Connection: Connect supply and return ducts to furnace using proper sealing techniques to prevent air leakage.
- Condensate Drain Installation: Install condensate drain lines with proper slope and trap for both furnace and air conditioner.
- System Startup: Evacuate system to 500 microns, charge with refrigerant, and perform complete system check.
Specifications
| Furnace Model | GMVC960804BN |
| AC Model | GSXC180481 |
| System Type | Gas Furnace & Split System Air Conditioner |
| Furnace Capacity | 80,000 BTU |
| AC Capacity | 4 Ton (48,000 BTU) |
| Efficiency Rating (Furnace) | 96% AFUE |
| Efficiency Rating (AC) | 18 SEER |
| Sound Level | 74 dB (Furnace) / 72 dB (AC) |
| Control Type | Two-Stage Heating & Cooling with Smart Thermostat |
| Refrigerant Type | R-410A |
| Electrical Requirements | Furnace: 120V, 60Hz | AC: 240V, 60Hz |
| Dimensions (Furnace HxWxD) | 44 x 21 x 26 inches |
| Dimensions (AC HxWxD) | 35 x 31 x 31 inches |
Warranty Information
- Full Warranty: 10 years parts, 1 year labor
- Heat Exchanger Warranty: Lifetime limited warranty
- Compressor Warranty: 10 years limited warranty
- Additional Coverage: Optional extended warranty available
For warranty service, contact Goodman Customer Service at 1-877-254-4729 or visit GoodmanMFG.com
Key Features
Two-Stage Gas Valve
Provides more precise temperature control and improved efficiency by operating at lower capacity most of the time, only using full capacity when needed.
Variable Speed Blower Motor
ECM motor adjusts speed to match system requirements, providing consistent airflow, better humidity control, and reduced energy consumption.
Scroll Compressor Technology
Outdoor unit features durable scroll compressor for quiet, efficient operation with fewer moving parts and better reliability than piston compressors.
SmartCoil Technology
Enhanced heat transfer surfaces on both indoor and outdoor coils improve efficiency and provide more consistent cooling performance.
ComfortNet Compatible
Works with Goodman's ComfortNet communicating system for advanced diagnostics, remote monitoring, and optimal system performance.
Sound Reduction Package
Insulated cabinet, compressor sound blanket, and specially designed fan reduce operational noise for quieter performance.
System Operation Modes
Heating Mode
Two-stage heating operation for consistent comfort and energy savings
Cooling Mode
High-efficiency cooling with dehumidification capability
Fan Only Mode
Continuous or intermittent fan operation for air circulation
Auto Mode
Automatic switching between heating and cooling based on thermostat setting
Emergency Heat
Backup heating mode for extreme cold conditions
Dehumidify Mode
Enhanced moisture removal during cooling operation
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| System won't start | Power issue, thermostat setting, safety switch | Check circuit breakers, thermostat settings, door safety switch |
| Insufficient heating/cooling | Dirty filter, low refrigerant, duct leaks | Replace filter, check refrigerant charge, inspect ductwork |
| Frequent cycling | Dirty coils, oversized unit, thermostat location | Clean coils, verify proper sizing, relocate thermostat |
| Unusual noises | Loose parts, duct vibration, blower issues | Tighten all fasteners, secure ductwork, inspect blower assembly |
| High energy bills | Dirty filter, duct leaks, improper charge | Replace filter regularly, seal duct leaks, verify refrigerant charge |
| Ice on coils | Low airflow, low refrigerant, dirty coils | Check filter and blower, verify refrigerant charge, clean coils |
Error Codes
- Code 1: Ignition failure - Check gas supply and igniter
- Code 2: Pressure switch stuck open - Check venting and switch
- Code 3: Pressure switch stuck closed - Check switch and tubing
- Code 4: Primary limit switch open - Check airflow and filter
- Code 5: Rollout switch open - Check burners and heat exchanger
- Code 6: Inducer motor failure - Check motor and capacitor
- Code 7: Blower motor failure - Check motor and capacitor
- Code 8: Gas valve circuit failure - Check wiring and valve
Manual Downloads
Current Model Manuals
GMVC960804BN
80K BTU 96% AFUE Furnace
GSXC180481
4 Ton 18 SEER AC Unit
GMVC800803BN
80K BTU 80% AFUE Furnace
GSXC160481
4 Ton 16 SEER AC Unit
Popular Previous Models
GMS80803BN
80K BTU 80% AFUE Furnace
GSX140481
4 Ton 14 SEER AC Unit
GMEC960804BN
80K BTU 96% AFUE Furnace
GSX130301
2.5 Ton 13 SEER AC Unit