Thermostat or wall area feels unusually warm to the touch

Safety first: Turn off power at the breaker before inspecting the thermostat. Overheating can be a fire risk.

Steps to address overheating:

• 1. Check load rating:
  • Verify the connected heating load is within the thermostat's rated current.
• 2. Inspect terminals:
  • Remove the thermostat and check for discolored or melted insulation at the terminals.
  • Tighten any loose screws and trim/reterminate damaged conductors.
• 3. Improve ventilation:
  • Ensure the thermostat is not installed in a sealed or insulated box that traps heat.
• 4. Use external contactor:
  • For high loads, use the thermostat to drive an external contactor or relay module instead of switching the full load directly.
• 5. Replace damaged thermostat:
  • If the housing is warped or discolored from heat, replace the thermostat.

When to call a professional: Any signs of burning smell or melted plastic require immediate attention from an electrician.