Jeffrey R Fair Haven , NJ April 05, 2020 Appliance: LG Dishwasher LDF7551ST Lg Dishwasher Ldf7551st / : Drain error. How to replace Drain Pump. I ordered the replacement Drain Pump for my LG Dishwasher and watched a video on how to install it. The replacement pump works great! Thanks! Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours