From: Coyoteboy on

Jeff Strickland wrote:
> Also, the circuit operates on milivolts or some very low logic voltage like
> that. I don't really know or care, my point is, any problem with the
> connection points will translate into poor operation of the system.

Only the sensor side operates at low voltage (0-1.1v to be precise),
the heater side (that the error is) is 12v and fairly high current.