Furnace runs but does not produce warm air; blower operates continuously with cool or room-temperature air from vents.

Safety: Turn off power and gas before inspecting burner or gas components. If you smell gas, do not attempt repairs—evacuate and call the gas utility.

Steps to check:

• Verify thermostat mode: Ensure the thermostat is set to HEAT, not FAN ONLY.
• Check gas valve position: Confirm the manual gas shutoff valve near the furnace is fully open (handle parallel to pipe).
• Observe ignition: Through the sight glass, watch the furnace start. If the inducer runs and the ignitor never glows, the ignitor or its wiring may be faulty.
• Inspect ignitor: With power off, visually inspect the hot surface ignitor for cracks or breaks. Replace with the correct Maytag-rated ignitor if damaged.

When to call a technician: If the ignitor glows but burners never light, or if you suspect a gas valve issue, contact a professional.