Stephen R Leola , PA September 19, 2021 Appliance: Whirlpool Refrigerator WRT1L1TZYB01 Whirlpool Refrigerator Wrt1l1tzyb01 / : Freezer unit of refrigerator ran warm. How to replace Run Capacitor. Following the AppliancePartsPros.com YouTube, I replaced the capacitor. The thermostat has to be on the highest setting, but now the freezer keeps things frozen. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes