Having a 5d error code what is it

http://www.fixya.com/search/p438316-whirlpool_duet_ghw9150p_front_load/5d_error_code

Try this link. Looks like it's a soap issue. Try washing without any soap and no dishes on heaviest hottest water for 1 or 2 cycles. Every 10 or 15 minutes, add 1/2 cup of vinegar. We had a similar issue and was with soap build up and we changed brands of soap and the problem went away. The vinegar will help clean out the system.