Thermostat displays "Aux Heat" frequently on a heat pump system

Safety: Configuration changes can be made without cutting power.

Steps to reduce aux heat use:

• Check configuration: In the Sensi installer menu, confirm the system is set as a heat pump with auxiliary heat and that staging logic is correct.
• Adjust balance point (if available): Lower the outdoor temperature at which auxiliary heat is allowed to engage, so the heat pump does more of the work.
• Avoid large setpoint changes: Use smaller temperature adjustments and rely on schedules instead of large manual setbacks that trigger aux heat.
• Monitor outdoor conditions: If aux heat runs even in mild weather, the heat pump may not be operating correctly and should be checked by an HVAC technician.

When to call a pro: Persistent heavy aux heat usage increases energy costs and indicates a possible heat pump performance issue that requires professional diagnosis.