Ultimate Heating Tune-Up Dual Fuel: serviced and inspected gas heating system checking air flow, temperature rise, electrical, gas pressure, safeties, controls and limits, heat exchanger and venting. cleaned and checked system components to manufacturer specifications and performed combustion inspection. serviced and inspected heat pump system, electrical, safeties, controls, reversing valve and defrost cycle to manufacturer specifications. Adjusted gas valve on the Bryant unit to bring the carbon monoxide and oxygen to arrange that burns more efficiently Ultimate Heating Tune-Up Heat Pump: serviced and inspected heat pump system, including electrical, safeties, controls, reversing valve and defrost cycle to manufacturer specifications.