Ecobee ecobee Smart Thermostat Essential with Touchscreen Display and eco+ Smart Features NO-POWER Error Fix: No Power or Blank Screen

Error code NO-POWER on the Ecobee ecobee Smart Thermostat Essential with Touchscreen Display and eco+ Smart Features means: No Power or Blank Screen. The thermostat display is completely blank and unresponsive — most commonly caused by a missing or incorrectly installed C-wire (common wire), a blown 3-5 amp fuse on the HVAC control board, a tripped circuit breaker, or the HVAC transformer not providing sufficient 24VAC power

The most successful fix is "Test and Replace HVAC Control Board Fuse and Verify Transformer Voltage" (medium difficulty, ~30 minutes). Estimated DIY cost: $10-$20. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Test and Replace HVAC Control Board Fuse and Verify Transformer Voltage") is rated medium difficulty and takes about 30 minutes. Tools needed: T20 Torx screwdriver, Multimeter, Needle-nose pliers.

DIY cost: $10-$20. Professional repair typically costs $120-$180. Many homeowners save money by trying the top-ranked community fix first.

The Ecobee ecobee Smart Thermostat Essential with Touchscreen Display and eco+ Smart Features has 8 other known error codes, including: APP-SYNC (App and Thermostat Out of Sync), AUX-OUTDOOR (Auxiliary Heat Outdoor Temperature Alert), AUX-RUNTIME (Auxiliary Heat Runtime Alert), BLOWN-FUSE (HVAC Control Board Fuse Blown), COOL-FAIL (Cool Not Reaching Set Temperature), and 3 more.

Error code NO-POWER also appears on 5 other Ecobee models: ecobee Smart Thermostat Enhanced with Radar Occupancy Sensor and Large Touchscreen, ecobee Smart Thermostat Premium with Siri and Alexa Built-In, Air Quality Monitor, and SmartSensor Included, ecobee SmartThermostat with Voice Control and Alexa Built-In, ecobee3 Lite Smart Thermostat, ecobee4 Smart Thermostat. The fix may vary by model, so check each model's specific page for tailored repair steps.