Arrived to remedy a system that’s blowing cold air. Checked thermostat for fault codes. Did not find any recent fault codes. Went down to perform diagnostic on the furnace. Did not find any issue with the systems operation. Measured a temperature split and verified that the system is heating well within spec. Determined that the fan has been kicking on inbetween heating cycles, and with the fan speed set to maximum it would sound like the system is trying to run a heating cycle. Installed a metering orifice in the humidifier feed line and replaced the humidifier panel to keep the humidifier from leaking water. Performed a combustion analysis and ran the system for an extended period to ensure systems performance and reliability. System is functioning properly at this time.