{"product_id":"5303918851-frigidaire-refrigerator-thermostat-kit-defrost","title":"Frigidaire Defrost Thermostat Kit 5303918851 — Fix Frost Buildup \u0026 Failed Defrost Cycles","description":"\u003cstyle\u003e\n.hero-banner{position:relative;overflow:hidden;background:linear-gradient(135deg,rgba(0,0,0,.86) 55%,rgba(0,0,0,.45)),url('https:\/\/cdn.shopify.com\/s\/files\/1\/0897\/7783\/2225\/files\/4444444444444444.png?v=1777040489') center\/cover no-repeat;padding:44px 34px;border-radius:12px;margin:0 0 28px;color:#fff;box-shadow:0 10px 30px rgba(0,0,0,.25);}\n.hero-banner:before{content:'';position:absolute;inset:0;background:radial-gradient(circle at center,rgba(0,153,255,.20),transparent 65%);animation:pulse 5s infinite;}\n.hero-banner\u003e*{position:relative;z-index:2;}\n.hero-banner h2{margin:0 0 8px;font-size:1.85em;font-weight:900;letter-spacing:.2px;line-height:1.1;}\n.label{display:inline-block;background:#c8a400;color:#000;font-size:.72em;font-weight:900;text-transform:uppercase;letter-spacing:1px;padding:5px 12px;border-radius:999px;margin-bottom:12px;}\n.hero-specs{display:flex;flex-wrap:wrap;gap:8px;margin-top:15px;}\n.hero-specs span{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);border-radius:999px;padding:7px 13px;font-size:.82em;font-weight:800;}\n.pro-tip{position:relative;overflow:hidden;background:#1a1a2e;border-left:5px solid #c8a400;padding:16px 20px;border-radius:8px;margin:24px 0;color:#f0f0f0;font-size:.95em;line-height:1.6;}\n.pro-tip strong{color:#c8a400;}\n.upsell-box{background:#ffecd1;border-left:5px solid #ff9800;padding:14px 18px;margin:20px 0;border-radius:8px;}\n@keyframes pulse{50%{opacity:.85}}\n\u003c\/style\u003e\n\n\u003cdiv class=\"hero-banner\"\u003e\n  \u003cdiv class=\"label\"\u003eOEM REPLACEMENT PART\u003c\/div\u003e\n  \u003ch2\u003eFrigidaire Defrost Thermostat Kit 5303918851 — Fix Frost Buildup \u0026amp; Failed Defrost Cycles\u003c\/h2\u003e\n  \u003cdiv class=\"hero-specs\"\u003e\n    \u003cspan\u003ePart# 5303918851\u003c\/span\u003e\n    \u003cspan\u003eFits Frigidaire\u003c\/span\u003e\n    \u003cspan\u003eFits Electrolux\u003c\/span\u003e\n    \u003cspan\u003eFits Kenmore\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch1\u003eRefrigerator Not Defrosting? Defrost Thermostat Kit 5303918851 — Fix Frost Buildup Fast\u003c\/h1\u003e\n\n\u003cp\u003e\u003cstrong\u003eA refrigerator that won't defrost isn't a compressor problem — it's almost always a failed defrost thermostat.\u003c\/strong\u003e In most Frigidaire and Electrolux refrigerators, the defrost thermostat is the safety cutoff that tells the defrost heater when to turn on and off. When it fails open, the heater never activates and frost accumulates on the evaporator coils until airflow is completely blocked. When it fails closed, the heater runs continuously and can damage the coils. \u003cstrong\u003e⚡ One of the most common defrost system failures in Frigidaire-platform refrigerators.\u003c\/strong\u003e \u003cstrong\u003ePart 5303918851\u003c\/strong\u003e is the genuine OEM defrost thermostat kit that restores proper defrost cycle control and eliminates runaway frost buildup.\u003c\/p\u003e\n\n\u003ch3\u003e❓ Is This the Right Part?\u003c\/h3\u003e\n\u003cp\u003eThis is the correct fix if ALL of the following are true:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e✔ Refrigerator powers on and compressor runs normally\u003c\/li\u003e\n\u003cli\u003e✔ Freezer gets cold but frost is building up heavily on the back wall or coils\u003c\/li\u003e\n\u003cli\u003e✔ Defrost heater confirmed functional (or not yet tested)\u003c\/li\u003e\n\u003cli\u003e✔ ONLY problem is frost accumulation and the fridge not completing defrost cycles\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNot sure? \u003ca href=\"\/pages\/contact\"\u003eSend us your model number\u003c\/a\u003e — we'll confirm before you order.\u003c\/p\u003e\n\n\u003ch3\u003e🔧 Common Symptoms\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHeavy frost or ice buildup on evaporator coils or freezer back wall\u003c\/li\u003e\n\u003cli\u003eRefrigerator section warming up while freezer stays cold\u003c\/li\u003e\n\u003cli\u003eEvaporator fan running but little to no airflow reaching the fridge compartment\u003c\/li\u003e\n\u003cli\u003eDefrost cycle never completing — frost never clears between cycles\u003c\/li\u003e\n\u003cli\u003eCompressor running constantly without reaching set temperature\u003c\/li\u003e\n\u003cli\u003eClicking or cycling sounds as system tries to initiate defrost\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e✔ If these symptoms match, this is the most likely failed component in the defrost system.\u003c\/p\u003e\n\u003cp\u003e✔ In most cases, replacing this defrost thermostat kit restores normal defrost operation immediately.\u003c\/p\u003e\n\n\u003ch3\u003e📦 Part Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 5303918851\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Defrost Thermostat Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrands:\u003c\/strong\u003e Frigidaire, Electrolux, Kenmore\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New Genuine OEM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShips From:\u003c\/strong\u003e Canada\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"upsell-box\"\u003e\n\u003cstrong\u003e⚠️ Recommended While Repairing:\u003c\/strong\u003e\u003cbr\u003e\nThe defrost thermostat rarely fails alone — if your defrost heater hasn't been tested, replace it at the same time. A failed heater with a new thermostat will produce identical symptoms within days. Testing or replacing both components in one service call eliminates the most common cause of repeat defrost failures on Frigidaire-platform refrigerators.\n\u003c\/div\u003e\n\n\u003ch3\u003e⚙️ Installation\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSkill Level: Easy — 20–40 minutes.\u003c\/strong\u003e Disconnect power before servicing. Remove freezer shelves and the evaporator cover panel to access the coils. Locate the defrost thermostat clipped to the evaporator coil, disconnect the wire leads, and swap the thermostat. Reinstall the cover panel and shelves, restore power, and allow one full defrost cycle to confirm normal operation.\u003c\/p\u003e\n\n\u003ch3\u003e✓ Compatible Models\u003c\/h3\u003e\n\u003cp\u003eConfirmed compatible with select Frigidaire, Electrolux, and Kenmore refrigerator models. \u003ca href=\"\/pages\/contact\"\u003eContact us to verify your model number\u003c\/a\u003e before ordering — defrost thermostat specifications vary by model and must be confirmed against your full model number on the door jamb sticker.\u003c\/p\u003e\n\n\u003ch3\u003e💡 Pro Tip\u003c\/h3\u003e\n\u003cdiv class=\"pro-tip\"\u003e\n\u003cstrong\u003eManual Defrost First — Always:\u003c\/strong\u003e\u003cbr\u003e\nBefore installing the new thermostat, manually defrost the evaporator coils completely. Installing a new thermostat over a heavily frosted coil means the first defrost cycle has to work overtime — and if the heater is marginal, it may not clear the ice load. A clean, frost-free coil surface gives the new thermostat the best chance of restoring normal cycle timing immediately.\n\u003c\/div\u003e\n\u003ch2\u003e✓ Model-Specific Repair Pages\u003c\/h2\u003e\n\u003cdiv class=\"model-link-grid\"\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-grmc2273cf03-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire GRMC2273CF03 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-grmc2273cf02-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire GRMC2273CF02 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-grmc2273cf01-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire GRMC2273CF01 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-grmc2273cf00-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire GRMC2273CF00 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-grmc2273cd03-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire GRMC2273CD03 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-grmc2273cd02-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire GRMC2273CD02 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-grmc2273cd01-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire GRMC2273CD01 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-grmc2273cd00-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire GRMC2273CD00 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-grmc2273bf02-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire GRMC2273BF02 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-grmc2273bf01-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire GRMC2273BF01 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-grfn2023af00-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire GRFN2023AF00 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-grbn2012af-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire GRBN2012AF Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-frms274tav00-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire FRMS274TAV00 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-frms2733av00-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire FRMS2733AV00 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-fg4h2272uf06-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire FG4H2272UF06 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-fg4h2272uf05-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire FG4H2272UF05 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-fg4h2272uf04-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire FG4H2272UF04 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-fg4h2272uf03-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire FG4H2272UF03 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-fg4h2272uf02-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire FG4H2272UF02 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-fg4h2272uf01-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire FG4H2272UF01 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-fg4h2272uf-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire FG4H2272UF Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-ermc2295as03-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire ERMC2295AS03 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-ermc2295as02-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire ERMC2295AS02 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-ermc2295as01-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire ERMC2295AS01 Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n  \u003ca href=\"\/pages\/frigidaire-refrigerator-ermc2295as-parts\" style=\"display:inline-block;border:1px solid #cc0000;border-radius:20px;padding:5px 14px;font-size:13px;color:#cc0000;text-decoration:none;margin:4px;\"\u003eFrigidaire ERMC2295AS Refrigerator Parts \u0026amp; Repair Guide\u003c\/a\u003e\n\u003c\/div\u003e","brand":"XPart Supply Ltd.","offers":[{"title":"Default Title","offer_id":53013420540193,"sku":"5303918851","price":48.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0897\/7783\/2225\/files\/Frigidaire_Defrost_Thermostat_Kit_5303918851_Fix_Frost_Buildup_Failed_Defrost_Cycles-1eb5-44d1-bc19-20eda397d58b.png?v=1783641646","url":"https:\/\/xpartsupply.com\/products\/5303918851-frigidaire-refrigerator-thermostat-kit-defrost","provider":"XPart Supply Ltd.","version":"1.0","type":"link"}