Maytag Gas Furnace Manuals

The Maytag Gas Furnace is a high-efficiency heating system designed for residential use, featuring advanced combustion technology, multiple heating stages, smart thermostat compatibility, safety shut-off systems, and energy-saving modes. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Gas valve assembly, heat exchanger, blower motor, igniter, flame sensor, pressure switches, thermostat connections.

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

1. Location: Install in well-ventilated area with proper clearances.
2. Gas connection: Use approved black iron pipe; pressure test required.
3. Electrical: 120V AC dedicated circuit; proper grounding.
4. Venting: PVC vent pipes per manufacturer specifications.
5. Ductwork: Properly sized and sealed return and supply ducts.

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

First-Time Setup

Initial startup must be performed by qualified technician.

1. Verify all connections: Gas, electrical, venting, and ductwork.
2. Check gas pressure: Adjust manifold pressure per specifications.
3. Test safety controls: Verify pressure switches, limit controls, flame sensor.
4. Program thermostat: Set heating schedules and temperature preferences.
5. Commission system: Run through complete heating cycle and verify operation.

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

Technical Specifications

• Input BTU/h: 40,000 - 120,000 (varies by model)
• AFUE: Up to 96%
• Stages: Single or two-stage operation
• Blower Motor: ECM variable speed
• Gas Type: Natural gas or LP (conversion kit required)
• Electrical: 120V AC, 60Hz
• Venting: PVC, CPVC, or ABS (check local codes)
• Sound Level: As low as 65 dBA
• Warranty: Limited lifetime heat exchanger, 10 years parts

Controls and Settings

Integrated control board with diagnostic LED. Thermostat controls heating operation.

Control Board: LED status lights, dip switches for configuration, reset button.

Thermostat Settings: Heat/Off mode, temperature setpoint, fan Auto/On, programmable schedules. Advanced Settings: Blower delay, temperature differential, stage timing. Diagnostic Codes: Flash patterns indicate specific error conditions for troubleshooting.

Venting and Ductwork

Direct vent system with separate intake and exhaust. Proper duct sizing critical.

1. Vent pipes: Use manufacturer-approved materials and sizes.
2. Clearances: Maintain required clearances to combustibles.
3. Slope: Proper slope for condensation drainage.
4. Terminations: Install according to local code requirements.
5. Duct sizing: Calculate based on home size and furnace capacity.

Tip: Have duct system professionally evaluated for optimal performance.

Operating Instructions

Normal operation controlled through thermostat.

1. Set thermostat to desired temperature and HEAT mode.
2. Furnace will initiate start-up sequence when heat demanded.
3. Inducer motor starts first to establish draft.
4. Pressure switches verify proper venting.
5. Hot surface igniter heats up, gas valve opens.
6. Flame sensor confirms ignition, main burners operate.
7. Blower motor starts after heat exchanger warms up.
8. Cycle continues until thermostat satisfied.

WARNING! Never block vents or returns; keep area around furnace clear.

Maintenance Schedule

Annual professional maintenance recommended. Monthly homeowner checks.

Professional Maintenance Includes: Heat exchanger inspection, burner cleaning, gas pressure check, safety control testing, blower cleaning and lubrication.

Safety Features

Multiple safety systems protect against hazardous conditions.

• Flame rollout switches: Detect improper burner flames
• High limit switches: Prevent overheating
• Pressure switches: Ensure proper venting
• Flame sensor: Confirms burner ignition
• Gas valve: Automatic shut-off capability
• Ignition control: Safe start-up sequencing

EMERGENCY: If you smell gas, evacuate immediately and call gas company from outside.

Regulatory Information

ANSI Z21.47/CSA 2.3: Certified for US and Canadian standards. UL listed. Meets Department of Energy efficiency standards. Copyright © Maytag; all rights reserved. For support, visit www.maytag.com or contact 1-800-688-9900. Installation must comply with National Fuel Gas Code NFPA 54/ANSI Z223.1 and local building codes.

Troubleshooting

Reset: Power cycle furnace at disconnect switch if lockout occurs.

Service: 1-800-688-9900; www.maytag.com