Thermostat calls for cooling but room temperature never reaches setpoint

Safety: Configuration changes can be made without cutting power. Do not open HVAC panels unless you are qualified.

Steps to correct:

• Verify system configuration: In the Sensi installer menu, confirm the system is set as conventional AC or heat pump as appropriate, with the correct number of cooling stages.
• Check fan mode: Set the fan to AUTO instead of ON so that the blower does not run continuously between cooling cycles, which can reintroduce warm air.
• Adjust cooling differential: In advanced settings, reduce the cooling differential so the system cycles more frequently and maintains a tighter temperature band.
• Compare temperature reading: Place a separate thermometer near the thermostat. If the Sensi reading is significantly higher than actual, the internal sensor may be off and the thermostat may need replacement.

When to call a pro: If configuration and sensor readings are correct but cooling is still inadequate, the issue is likely with the AC system (low refrigerant, dirty coil, etc.) and requires HVAC service.