What was found
CLIMBING THROUGH FL270, INCREASED HEAT ON FLIGHT DECK AUTO TEMP CONTROLLER. ODOR OF EXHAUST OR BURNING OIL WAS NOTICED BY BOTH FLIGHT CREW. TURNED TEMP BACK DOWN TO CLOSE VALVE AND ODOR DIMINISHED. RAN APU AND BOTH ENGINES IAW JRH. RAN BOTH PACKS AT ALL TEMP SETTINGS WITH NO EXHAUST OR OIL FUMES NOTICED. PERFORMED OIL CONTAMINATION REMOVAL FOR AIR CONDITIONING SYSTEMS IAW AMM 21-00-21-2, NO ODORS NOTED. ACFT OK FOR SERVICE.