I built a six shelve rack and wired each shelve individually. They are then plugged into a power strip which is then plugged into an older model herpstat 2. I'm having issues with the bottom two shelves not heating up. I replaced the bottom shelve and still nothing, that's when I discovered the one above wasn't heating up either. I have switched the plugs around and no matter the combo, they still won't heat up. Only when I move them to an outlet not associated with the thermostat will they work.
Is there a way to parallel them together once they're already wired up? If not, does anyone have any ideas on what I'm doing wrong? I can't use the second probe as its inside my incubator.