"Fan was blowing at high speed!! AC still blowing at half speed."

When the A/C is turned on, the cooling fan will blow at high speed. This fan does not only draw air to cool the radiator but also draws air to cool the condenser in front of the radiator (the fan has double duty). The A/C fan blows over the evaporator and only moves air over it into the cabin. The A/C compressor works at the same pressure no matter what the speed of the HVAC fan (half speed or whatever), and when the compressor is on the cooling fan will go to high speed. The sensor could be bad in the bottle like one has said---also the tsb that you stated could be the problem---both make sense. Whatever the problem is I would get it fixed because you do not need to become "numb" to this light. If something was to stop working you would not know because you would just say "it comes on every now and then....." and just blow the "real" warning off!!! Good luck---Jimmy