Danfoss Ally Keypad / Button Failure

Thermostat buttons are unresponsive or require very hard presses to register.

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Possible Causes

Worn or damaged button contacts, Dirt or debris under keypad, Moisture ingress, PCB switch failure

How to Fix / Troubleshooting

Safety first: Remove power or batteries before handling the thermostat. Do not pry open sealed parts beyond what the manual allows.

Steps:

  • Check for lock mode: Ensure child lock or keypad lock is not enabled in the Ally app or thermostat settings.
  • Power cycle: Remove power for a few minutes and restore to clear any temporary software lock.
  • Dry and clean: If the thermostat has been exposed to moisture, remove it from the wall and allow it to dry in a warm, dry place for 24 hours.
  • Replace unit: If buttons remain unresponsive, the internal switches or keypad membrane are faulty; replace the thermostat.
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Repair Difficulty

Easy 2/5

Required Part

Danfoss Ally Thermostat (front keypad / PCB switches)
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