.xp{font-family:Arial,Helvetica,sans-serif;color:#1b1b1b;line-height:1.5;max-width:1100px;margin:auto}.xp *{box-sizing:border-box}.xp .hero{position:relative;overflow:hidden;border-radius:12px;padding:22px 28px;margin-bottom:18px;color:#fff;background:#111;isolation:isolate}.xp .hero:before{content:"";position:absolute;inset:0;z-index:-2;background:url('https://cdn.shopify.com/s/files/1/0897/7783/2225/files/4444444444444444.png?v=1777040489') center/cover no-repeat}.xp .hero:after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(135deg,rgba(0,0,0,.86) 55%,rgba(0,0,0,.45))}.xp .label{display:inline-block;background:#e60000;color:#fff;font-weight:800;font-size:11px;letter-spacing:.05em;padding:6px 10px;border-radius:20px;margin-bottom:9px}.xp .hero h2{font-size:clamp(22px,3vw,34px);line-height:1.1;margin:0 0 8px;color:#fff!important}.xp .hero p{margin:0;color:#fff!important}.xp .specs{display:flex;flex-wrap:wrap;gap:7px;margin-top:10px}.xp .specs span{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.25);padding:5px 8px;border-radius:7px;font-size:12px;font-weight:700;color:#fff!important}.xp h2{font-size:27px;margin:28px 0 10px;color:#111}.xp .grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;margin:16px 0}.xp .card{border:1px solid #ddd;border-radius:10px;padding:16px;background:#fff}.xp .card strong{display:block;color:#e60000;margin-bottom:3px}.xp ul,.xp ol{padding-left:22px}.xp li{margin:6px 0}.xp .tip{border-left:5px solid #e60000;background:#f6f6f6;padding:16px 18px;border-radius:9px;margin:22px 0}.xp .note{font-size:14px;color:#444;background:#fafafa;border:1px solid #e5e5e5;border-radius:9px;padding:14px;margin-bottom:24px}@media(max-width:640px){.xp .hero{padding:19px}.xp .hero h2{font-size:24px}.xp h2{font-size:24px}} GENUINE OEM REPLACEMENT PART Hisense Refrigerator 1418409, Replaces c8a400 Defrost Sensor – Genuine OEM Hisense Refrigerator | Defrost Sensor / Thermistor | 1418409 (K1418409) Part 1418409 Replaces c8a400, f0f0f0, K1418409 Hisense Refrigerator 1418409 Is This the Right Part? Part Number1418409 Replacesc8a400, f0f0f0, K1418409 ManufacturerHisense Appliance TypeRefrigerator Confirm the complete model number before ordering. Similar parts may use different connectors, dimensions, hose positions, electrical ratings, or mounting points. Excessive frost or ice buildup on the freezer evaporator coils Refrigerator not cooling or running warmer than set temperature Freezer section frosting over completely Defrost cycle not running or running continuously Fan blocked by ice buildup causing reduced airflow Error codes related to defrost or temperature sensor faults OEM Part Number: 1418409 (K1418409) Part Type: Refrigerator Defrost Sensor / Thermistor Compatible Brands: Hisense (verify by model number) Fit: Direct OEM replacement — no modification required Repair Difficulty: Beginner–Intermediate (2/5) Skill Level: Beginner–Intermediate — freezer panel access required Disconnect power at the wall outlet or breaker before starting Remove freezer contents and any ice buildup from the evaporator cover panel Unclip the sensor from the evaporator coils and disconnect the wire harness Clip the new sensor into position on the evaporator and reconnect the harness Reassemble the panel, restore power, and allow 24 hours for temperatures to stabilize 💡 Pro Tip — Check the Defrost Heater and Defrost Timer Too: The defrost system has three components that work together: the defrost sensor, the defrost heater, and the defrost timer/control. If the sensor tests good but frost buildup continues, the heater or timer is the next suspect. Test the heater for continuity with a multimeter — an open circuit means it’s failed. Replacing all three during the same service call is inexpensive and eliminates the most common defrost system failures in one visit. Part Details ConditionOEM Use a qualified technician when diagnosis or installation is outside your experience. Gas parts should be installed by a licensed technician.