Regulates coolant flow to bring the engine to operating temperature and hold it there. Stuck open costs fuel quietly and sets closed-loop and thermostat codes; stuck closed destroys an engine in minutes. An inexpensive part behind some of the most consequential outcomes in the corpus.
Also known as: stat, coolant thermostat, thermostat housing, t-stat
Referenced by 40 codes
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A thermostat is a valve that stays shut until the coolant around it reaches a set temperature, then opens. That is the whole of the mechanism. What makes it worth an article is tha...
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