I have a Kitchenaid dishwasher model KDTE204ESS3. After running the diagnostic cycle the error code that came up was 7-1. I cleared the code and we ran a few cycles and the loads were coming out clean. However it started acting up again and the loads were not being washed. Sometimes the detergent would not melt completely. I ran the diagnostic cycle again however no error codes came up but there is a large amount of soap suds on the bottle. Any ideas what the problem could be? I initially thought it was an issue with the water supply line having low pressure but I checked it and it is fine.