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Primary Boiler Pump Failure?
I think I have a primary boiler pump failure. The pump is getting really hot but the impeller is not turning (i.e. it is not making the regular humming sound when it is pumping). So the when the boiler is overheating and faulting off due to no circulation. The temperature and pressure soars in the boiler than shuts off showing F2 on the vitodens 100-W. The upstream and downstream pipes to the pump are cold but the pump gets very hot. It is a Taco Cartridge circulater model 007-F5. When I open any of the 3 systems drains water comes out so it is full of water.
Does it sound like a pump failure?