I am seeing error code 03 and cannot get the machine to drain without pulling either the clean-out or the drain tube on the front. The hoses have been checked for debris (none) and drain hose back flushes okay. The pump motor cover lists it as a Siemens 2AK1506-2BN. Can this part be checked with either an ohm meter or by applying power to it in order to determine if it is okay (before ordering a replacement drain pump assembly)?