Schneider Electric
Moisture Ingress / Condensation
Thermostat shows condensation or moisture inside the display cover.
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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
High humidity environment, Cold exterior wall causing condensation, Poor sealing of thermostat housing, Water leak in wall cavity
How to Fix / Troubleshooting
Safety: Turn off power to the thermostat before removing it if there is visible moisture.
Steps:
- Remove the thermostat from the wall and gently dry the unit with a soft cloth; do not use heat guns or hair dryers.
- Inspect the wall cavity for signs of water leaks or high moisture; repair any plumbing or building envelope issues.
- Install an insulating backplate or gasket between the thermostat and exterior wall to reduce condensation.
- Allow the thermostat to dry completely in a warm, dry area before reinstalling.
- If corrosion or damage is visible on the PCB or connectors, the thermostat may fail prematurely and should be replaced.
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Repair Difficulty
Medium
3/5
Required Part
Thermostat Housing and Main PCB
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