Thank You for writing into AskPatty! I suggest beginning with your temperature sending unit sensor. Check the wire to the sensor, ground wire to engine while having the ignition on, if the needle moves your sending unit needs to be replaced.
Hope this Helps!
〉 Answered on Oct 5th, 2012 by Amanda J. Pierce, MBA "AJ", Certified Mechanic, Project Coordinator; Primavera Scheduler at VIGOR Alaska Industrial Shipyard & BizzM3ch Solutions