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post #3 of Old 06-29-2019
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Re: Depression and thermostats

Gauges are notoriously inaccurate. Most offen the best they can do is let you know that the temp (in this case) is straying off the norm.
But from your description, if it is not a connection in the wiring, it could be a faulty thermostat. Not much else, and I lean toward a wiring connection if the temp changes are as rapid as you imply.
I'd get a heat gun and make sure the engine is or is not actually changing temperature at all, and change the thermostat just because.
Good luck.

"Any idiot can make a boat go; it takes a sailor to stop one." Spike Africa aboard the schooner Wanderer in Sausalito, Ca. 1964.
“Believe me, my young friend, there is nothing - absolutely nothing - half so much worth doing as simply messing about in boats.” ― Kenneth Grahame, The Wind in the Willows

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