Peter K Oneida , WI March 10, 2017 Appliance: Maytag Washer MFW9700SQ1 Maytag Washer Mfw9700sq1: Fh error code. How to replace Washer Drain Pump Assembly. Replaced the water inlet valve as well as the pressure switch. While I was at it replaced flow meter and drain pump. Although the old drain pump was working OK the new one runs much quieter. So far, 4 loads washed and no codes! I believe the pressure switch did the job! 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes