the temperature warning light flashing is progably flashing because your coolant level is low. check that out. also the terminals on the sensor can be messed up etc causing the light to come on.
also where are you defining as "normal"? if the needle is sitting in the lower section of hte guage, your thermostat maybe stuck opening, and your engine ain't warming up enough to provide hot air, just one possibility of what the problem is.
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