Work Performed: Maintenance and diagnostic inspection on 2018 Daikin two-stage furnace. Results: - Client reported issue where furnace requires power cycling several times at season start-up;client observed error code “1 flash” indicating flame sensor sensing flame without ignition - Cleaned flame sensor and inspected ignition and flame rectification components - Removed and inspected burners and burner vestibules — clean, no signs of corrosion or blockage - Performed full combustion analysis and heat exchanger inspection — results within manufacturer safety and efficiency standards - Verified staging operation, checked all electrical and safety switches — no faults found - Found blower speed slightly low causing higher temperature rise; increased fan speed to maintain temperature within manufacturer specifications - Checked gas pressure — found slightly high and adjusted to proper range (1.9"–3.5" WC) per manufacturer specs - Advised client to confirm all return a