Hi Mike I always used the QHY9 temp control in Nebulosity or the preference page temp setpoint. The QHY9 setter is in the view menu of Nebulosity2.
I cannot remember where the TEC enable button is but think it is on the QHY9 control. I think the default startup is 100% on. Make sure it is turned on. Also make sure your cables are not all curled up as you seem to get some induced effects on curled up cables.
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