Salvo wrote:
I know all about them. I purchased one of the first ARP units. The algorithm is very simple. Either you have a thermal run-away or you don't. When the flu temperature reaches the max allowable you cut power to the fridge. There's no "if's, & "or's" about it. You cut power. The controller can try to power up the fridge again at a little later time to see if it now operates OK, but that's about the extent of the algorithm.
That is not the extent of the algorithm- if it were, a simple thermal switch would do it, and Dometic would not be trying to get around the patent.
I don't know about cheap RTD sensors, but I do know the one Paul uses is pricey- far more than $15.