Thermostat shows heat or cool is on, but room temperature never reaches setpoint

Safety: Turn off power before opening equipment panels.

• Verify system type and stages: In the Honeywell Home installer menu, confirm the correct system type (heat pump vs conventional) and number of stages are configured.
• Check air filter and vents: Replace dirty filters and ensure all supply and return vents are open and unobstructed.
• Inspect zoning dampers (if present): For zoned systems using Honeywell zone panels and dampers, verify that dampers open when your zone calls for conditioning.
• Monitor runtime: If the system runs continuously without reaching setpoint, have a professional evaluate system sizing, refrigerant charge, and combustion performance.