Performed comprehensive tune-up on 20-year-old backup furnace system. Inspected and cleaned components, noting clean filter and blower but observed motor showing initial hesitation at startup. Identified clogging in secondary heat exchanger, but confirmed heat exchanger integrity with no compromises found. Verified proper gas pressures with 55°F temperature rise during 20-minute operational test. Also inspected supplementary wood boiler system, confirming all components functioning correctly.
