Performed QA on Trane Gas Furnace/AC system. Installed the Surge Protector onto the Furnace. Tested system in Heating and Cooling. Performed Combustion testing and measured gas pressures for low and high stage heat. Filled condensation pump to test. Tested wet switch and ez trap safeties. Reviewed all programming on system. Reviewed installation with homeowner. Completed checklist form in system.