On a Copland scroll usually has those hose clamp looking style crankcase heaters around the bottom portion area of the compressor, it has a constant 208/230 volts applied to it. I amped it out it's drawing no amps, I ohmed it out it was open, need to replace it, I amped out 3 others heaters same result, do they have some kind of ptcr piece in it, once it heats up to a certain temp, resistance increases doesn't allow power to flow through???? But then when ohming it out I should get a reading! Its a cch usually straight forward but being that I seen like 4 that were bad doesn't seem right,