I've bought new pump to my chiller - MCP655B. Chiller is quite strong, 6.8k btu rotary, 10 plate heat exchanger, I have MCW60 and D-Tek Fuzion V1 in my loop. The problem is, that pump shuts off around -14C. I'm using coolant for car radiators, almost pure (designed up to -35C), it gets really dense in those temps, flow is really low and I'm almost sure, that pump is overheating (I had the same in MCP350, but around -7C).
Any suggestions? Mabe I should change my liquid to something else? (or add some alcohol)