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Sounds Like A Bad Temp. Sending Unit. I would remove it and clean the thing & see if that might help. I`m not sure how to test one, a parts house may help. Hope this helps

Since these sensors only cost about $8, it's just as easy to replace it.


They're also typically mounted up near the thermostat housing, making it pretty easy to get at and replace.


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15y ago

What else can I help you with?