The BX 2200 tend to be sensitive to air flow when it comes to Cooling there have been many suggestions I've seen online about improving a situation such as new radiator belt blow out the breed it has collected on the outside of the radiator clean it flush the radiator change the ratio of water to antifreeze add a tank to hold more coolant in the system move the battery to promote better air flow I did none of the above I took a fan from a BX 26 series which has five blades trimmed it down slightly in diameter and replace that original four blade fan my cooling problem is now eliminated