Maytag Furnace Manual

The Maytag Furnace is a high-efficiency heating system designed for residential use, featuring advanced combustion technology, variable-speed blower motor, electronic ignition, built-in diagnostics, multiple safety controls, and energy-saving operation modes. Compatible with standard thermostat systems and available in various BTU capacities. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Heat exchanger, blower assembly, gas valve, igniter, flame sensor, pressure switches, control board, filter compartment.

Feature	Description
Variable-speed blower	Adjusts airflow for optimal efficiency and comfort
Electronic ignition	Reliable spark ignition system
Multi-speed operation	Adapts to heating demands
Built-in diagnostics	LED status lights for troubleshooting
Safety controls	Flame rollout, limit switches, pressure sensors
Filter monitoring	Reminds when to replace air filter
Quiet operation	Sound-absorbing insulation
Energy efficient	High AFUE rating
Durable construction	Stainless steel heat exchanger
Easy maintenance	Accessible service panels

Installation

Unpack and inspect contents. Ensure proper location with adequate clearance.

1. Position furnace: Place on level surface with proper clearances as specified.
2. Connect gas line: Use approved gas piping and fittings; pressure test for leaks.
3. Connect venting: Install proper vent pipes according to local codes.
4. Electrical connections: Connect to 120V power supply and thermostat wiring.
5. Install air filter: Place clean filter in filter compartment.

WARNING! Installation must be performed by qualified HVAC technician. Gas leaks can cause explosion or fire.

First-Time Setup

Power on furnace; follow startup sequence.

1. Verify gas supply: Ensure gas valve is open and pressure is correct.
2. Check electrical: Confirm power is connected and thermostat has batteries.
3. Startup sequence: System will run self-check and begin normal operation.
4. Test operation: Set thermostat to heat mode and verify proper function.
5. Adjust settings: Configure blower speed and other parameters if needed.

CAUTION! Do not bypass safety controls. Ensure proper ventilation.

Specifications

• BTU Capacity: 40,000 - 120,000 BTU/h (model dependent)
• AFUE Rating: Up to 96% efficiency
• Gas Type: Natural gas or propane
• Electrical: 120V AC, 60Hz
• Blower Motor: Variable-speed ECM
• Heat Exchanger: Stainless steel
• Venting: PVC or metal according to model
• Filter Size: Standard 16x25x1 or 20x25x1
• Warranty: Limited lifetime heat exchanger
• Sound Level: As low as 65 dB

Controls and Settings

Access control board via front service panel. LED status lights indicate system operation.

Control Board: POWER switch, LED diagnostic lights, DIP switches for configuration.

Operating Modes: HEAT, OFF, FAN ON. Blower Settings: Auto, Continuous. Temperature Control: Via thermostat. Diagnostic Codes: Flash patterns indicate specific issues. Configuration: Blower speeds, timing delays, accessory settings.

Connecting Thermostat

Standard 24V thermostat connection with R, W, G, C terminals.

1. Turn off power to furnace before wiring.
2. Connect thermostat wires to control board terminals.
3. Match wire colors to terminal labels (R-red, W-white, G-green, C-common).
4. Secure connections and restore power.
5. Test thermostat operation.

Tip: Use programmable thermostat for maximum energy savings.

Operation

Normal heating cycle operation.

1. Thermostat calls for heat: Sends signal to control board.
2. Inducer motor starts: Creates draft for combustion.
3. Pressure switch verification: Confirms proper draft.
4. Ignition sequence: Hot surface igniter glows, gas valve opens.
5. Flame detection: Flame sensor confirms ignition.
6. Blower activation: Circulates warm air through ducts.
7. Cycle completion: Thermostat satisfied, system shuts down.

WARNING! Never block air vents or returns. Maintain clear combustion air intake.

Maintenance

Regular maintenance ensures optimal performance and longevity.

• Monthly: Check and replace air filter as needed
• Seasonal: Inspect vent system for obstructions
• Annual: Professional inspection and cleaning
• As needed: Clean flame sensor and burners
• Monitor: Listen for unusual noises or operation changes

Care & Cleaning

Turn off power before any cleaning. Use soft brush and vacuum for dust removal.

CAUTION! Do not use water or liquid cleaners. Keep electrical components dry.

Regulatory Information

UL listed and ANSI certified. Complies with ASHRAE standards. Manufactured to meet EPA efficiency requirements. For support, visit www.maytag.com or contact 1-800-688-9900. Serial number and model information located on unit rating plate.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, switch	Check circuit breaker, thermostat settings, power switch
No heat	Gas supply, filter, ignition	Verify gas valve open, replace filter, check pilot/igniter
Short cycling	Filter, thermostat, limit switch	Clean/replace filter, check thermostat location, reset limits
Blower not working	Motor, capacitor, control	Check blower motor, capacitor, control board signals
Unusual noises	Motor, bearings, ducts	Lubricate motor, tighten components, check ductwork

Reset: Turn power off for 30 seconds then restore.

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