Why doesn't the heater get hot and the temperature gauge is on hot? on 1998 Toyota Tacoma

I noticed that my heater was blowing cool air snd then the needle for the temperature went up to hot. When I turned off the heater the temperature went down some.

by in West Point, GA on November 02, 2013
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1 answer 2 comments
ANSWER by , November 02, 2013
Does the engine actually get as hot as the gauge shows?
COMMENT by , November 02, 2013
The engine did not overheat but the needle was on hot.
COMMENT by , November 02, 2013
Sounds like a grounding issue; Check and clean all your grounds before going further, and coolant level.