Warning W238 - Cooling system thermal resistance is abnormally high. If the values reported for processor power, processor and mainboard temperatures are correct then something may be wrong with the cooling system. The fan may have failed or is not spinning at its rated speed.
Fix: Check cooling system, including the fan(s) and thermal interface material. Also check that the cooling system is rated to cope with the processor you have installed at the speed it is running. If you have over-clocked the processor you may need a better cooling solution.
For more information, please see the (FAQ).