Thermostat calls for heat but only the fan runs and no warm air is produced
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety first: Turn off power and gas (if applicable) before opening furnace panels. Gas and high-voltage components should be handled by professionals.
- Step 1 – Verify thermostat configuration: Confirm the thermostat is set for the correct type of heating (gas/oil vs. electric vs. heat pump) in the installer menu.
- Step 2 – Check W wiring: Ensure W1 (and W2 if used) are correctly wired at both thermostat and Amana control board.
- Step 3 – Observe furnace status lights: Many Amana furnaces flash diagnostic codes. Note the pattern and refer to the furnace manual.
- Step 4 – Do not bypass safety switches: If a limit or rollout switch is open, it indicates an unsafe condition. Do not jumper these; call a professional.
When to call a professional: Any issue involving gas valves, heat strips, or safety switches should be handled by an HVAC technician.
Repair Difficulty
Required Part
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