We have a Blomberg model number DWT 14220 NBL00. It is 2 years old and is producing a grinding noise when it is first filling with water. It will repeat the noise when the rinse cycle starts. It is quite noisy, but disappears when the water filling is completed. We discussed this with the retailer and were told to run 2 cycles with vinegar added. We did that but the noise continues. Cleaning so far has not been affected. Any suggesitions? Thank you Tom Stites duchess@macomb.com