Lawrence N Florence , AZ April 25, 2020 Appliance: Whirlpool Washer WTW7500GC0 Whirlpool Washer Wtw7500gc0: Error code lf. Hot water side of fill valve stuck. How to replace Water Inlet Valve. Ordered new fill valve. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes