Furnace runs but produces insufficient heat; home never reaches set temperature.

Safety: Gas input and pressure adjustments must be performed by a licensed gas technician. Do not adjust gas valves yourself.

• Filter and airflow: Ensure the filter is clean and all registers are open. Excessive airflow can reduce supply air temperature.
• Thermostat verification: Confirm the thermostat is properly calibrated and located away from drafts or heat sources.
• Burner inspection: With power and gas off, remove the burner assembly and inspect Wolf burner orifices and ports for debris or rust. Clean gently with a soft brush; do not enlarge orifices.
• Professional gas check: A technician should verify manifold pressure and input rate against the Wolf furnace rating plate and adjust or replace the gas valve if needed.