Ok so I bought an original herpstat from a guy that kept it as a backup and said he used it a handful of times. Im having problems with it fluctuating too much. When the light is red and it is heating it makes the heat tape get really hot and then when it is green its ok but sometimes it gets too hot? And shuts off. For example i have it set to 88 but sometimes it hits 88.1-88.2 and it shuts off the herpstat and then there is no heat. What am I doing wrong? Any help is really appreciated


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