GE Ambassador Mark 2 Furnace Manual

The GE Ambassador Mark 2 is a high-efficiency gas furnace designed for residential heating applications. This model features advanced combustion technology, variable-speed blower motor, electronic ignition system, multi-speed operation, built-in diagnostics, and energy-saving modes. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation Requirements 3. First-Time Setup 4. Technical Specifications 5. Controls and Operation 6. Maintenance Procedures 7. Safety Features 8. Error Codes and Diagnostics 9. Seasonal Operation 10. Warranty Information 11. Troubleshooting

Features at a Glance

Key components: Stainless steel heat exchanger, variable-speed ECM blower, electronic ignition, pressure switches, flame sensor, control board, and diagnostic LED.

Feature	Description
Heat Exchanger	Stainless steel construction for durability and efficiency
Blower Motor	Variable-speed ECM for quiet operation and energy savings
Ignition System	Electronic hot surface ignition
Gas Valve	Modulating gas valve for precise temperature control
Control Board	Microprocessor-based with diagnostic capabilities
Pressure Switches	Safety switches for proper venting operation
Flame Sensor	Monitors burner flame for safety shutdown
Air Filter	Standard 1-inch filter slot
Vent Connections	PVC venting compatible
Thermostat Connection	Standard 24V connections

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

Location: Install in dry, well-ventilated area with proper clearances.
Gas Connection: Use approved gas piping; pressure test required.
Electrical: 120V AC, 60Hz dedicated circuit required.
Venting: PVC vent pipe per manufacturer specifications.
Ductwork: Properly sized and sealed duct system.

WARNING! Gas appliances can be dangerous if improperly installed. Use licensed professional for installation.

First-Time Setup

Initial startup must be performed by qualified technician.

Verify all connections: Gas, electrical, venting, and ductwork.
Check gas pressure: Adjust to manufacturer specifications.
Test safety controls: Pressure switches, limit switches, flame sensor.
Program thermostat: Set heating parameters and schedules.
Test operation: Verify proper ignition and heating cycle.

CAUTION! Never attempt first startup without proper training and equipment.

Technical Specifications

Heating Capacity: 60,000 - 120,000 BTU/H (model dependent)
Efficiency: 95% AFUE
Gas Type: Natural Gas (convertible to LP)
Electrical: 120V AC, 60Hz, 5 Amps
Blower Motor: Variable-speed ECM
Static Pressure: 0.2 - 0.8 inches WC
Vent Size: 2-3 inch PVC
Filter Size: 16x25x1 inches (standard)
Dimensions: Varies by model
Warranty: 20-year heat exchanger, 5-year parts

Controls and Operation

Primary control through thermostat. Internal controls accessed via control board.

Thermostat Settings: HEAT/COOL/OFF, FAN AUTO/ON, temperature setpoints.

Control Board: LED diagnostic light, dip switch settings, service test mode. Blower Speeds: Multiple speed taps for heating and continuous fan operation. Gas Valve: Modulating operation for precise temperature control. Limit Switches: High-temperature safety cutoffs.

Maintenance Procedures

Regular maintenance ensures optimal performance and safety.

Monthly: Check and replace air filter as needed.
Seasonal: Inspect vent system for obstructions.
Annual: Professional inspection and cleaning required.
Blower: Clean blower assembly and motor annually.
Burners: Clean and inspect burners for proper flame.
Drain System: Clear condensate drain lines.

Tip: Keep area around furnace clear for proper airflow.

Safety Features

Multiple safety systems protect against hazardous conditions.

Safety Feature	Function
Flame Rollout Switch	Detects improper burner flames
High Limit Switch	Prevents overheating
Pressure Switches	Ensures proper venting operation
Flame Sensor	Monitors burner operation
Ignition Control	Safe start-up sequence
Gas Valve	Automatic shutoff on fault

Error Codes and Diagnostics

Control board LED flashes indicate specific error conditions.

LED Flashes	Description	Action
1	Ignition failure	Check gas supply, ignition
2	Pressure switch fault	Check venting, switches
3	Limit circuit fault	Check airflow, filters
4	Flame sense fault	Clean flame sensor
5	Rollout switch fault	Check heat exchanger
Continuous	Normal operation	No action needed

Seasonal Operation

Proper seasonal preparation ensures reliable operation.

Winter Startup: Test system before heating season, replace filter, verify thermostat operation.

Summer Shutdown: Turn off power if not using AC, keep filter in place, cover unit if desired.

Continuous Operation: For year-round AC use, maintain regular filter changes.

Warranty Information

GE Ambassador Mark 2 limited warranty coverage.

Heat Exchanger: 20 years limited warranty
Parts: 5 years limited warranty
Labor: 1 year limited warranty
Registration: Required within 90 days of installation
Transferable: Yes, to subsequent homeowners

For warranty service, contact authorized GE service provider with model and serial numbers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, switch	Check circuit breaker, thermostat settings, door switch
No heat	Gas supply, ignition	Verify gas valve on, check pilot/ignition, error codes
Short cycling	Filter, airflow, sensor	Replace filter, check vents, clean flame sensor
Blower won't stop	Thermostat, control	Check thermostat fan setting, control board
Unusual noises	Motor, blower, ducts	Inspect blower assembly, motor bearings, ductwork
Error code flashing	System fault	Refer to error code chart, call for service

Reset: Turn power off for 5 minutes, then restore.

Service: 1-800-GE-CARES; www.geappliances.com