Can someone please help me out. I have a larger DIY cabinet incubator. I'm using a baseboard heater in the top compartment for heat with my fan blowing through ABS to the egg compartment. Question is, how often would be normal for a heater to cycle on and off? I have it set for a .5degree celius on off but it seems to heat up to temp go off for about 3 mins then turn back on. is this normal?