Amana
Unstable Power or Internal Thermostat Fault
Thermostat frequently reboots or restarts on its own
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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.
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Possible Causes
Loose R or C connection at thermostat, Intermittent short in thermostat cable, Overloaded 24V transformer on Amana equipment, Failing thermostat processor or firmware corruption
How to Fix / Troubleshooting
Safety first: Turn off power to the furnace/air handler before tightening wiring connections.
- Step 1 – Reseat thermostat: Remove and reinstall the thermostat on its wall plate to ensure solid contact.
- Step 2 – Tighten R and C terminals: With power off, tighten the R and C terminal screws at both the thermostat and Amana control board.
- Step 3 – Check for added loads: If accessories (humidifier, zoning, etc.) were recently added, the 24V transformer may be overloaded. An HVAC technician may need to upgrade the transformer.
- Step 4 – Factory reset: Perform a factory reset of the thermostat and update firmware if possible.
- Step 5 – Replace thermostat: If reboots continue after wiring and transformer checks, replace the thermostat.
When to call a professional: Persistent power issues or transformer upgrades should be handled by an HVAC technician.
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Repair Difficulty
Medium
3/5
Required Part
Amana Smart Thermostat Assembly
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