What was found
DURING CLIMBOUT AN UNUSUAL ODOR WAS PRESENT IN THE COCKPIT. ODOR BECAME STRONG ENOUGH THAT AN IMMEDIATE LANDING WAS MADE. NO SMELL ON GROUND OR DURING RUNUP. POWER SETTINGS MADE NO DIFFERENCE IN INTENSITY. UPON INSPECTION, FOUND CABIN VIP SEAT TEMP CONTROLLER SET TO HOT SETTING. ADJUSTED TEMP TO COLD & OPS CHECKED AT VARIOUS POWER LEVER SETTING WITH NO DEFECTS NOTED AND NO ODOR. SYSTEM OPERATED NORMALLY.