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❄️ Upgrade your fridge’s heartbeat — never let ice slow you down!
The BlueStars Upgraded 4387503 Bimetal Defrost Thermostat is a premium replacement part compatible with Whirlpool, Kenmore, and other major brands. Engineered to open at 48°F and close at 62°F, it precisely controls the defrost cycle to prevent ice buildup, ensuring efficient cooling. Easy to install and built to OEM standards, it offers a cost-effective, durable solution backed by a lifetime protection warranty—perfect for savvy DIYers aiming to extend their refrigerator’s lifespan and avoid costly repairs.



| ASIN | B07X25W7CS |
| Additional Features | EASY TO INSTALL |
| Age Range Description | Adult |
| Best Sellers Rank | #63,643 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #64 in Freezer Parts & Accessories |
| Brand Name | BlueStars |
| Color | Silver |
| Customer Reviews | 4.6 4.6 out of 5 stars (369) |
| Display Type | Analog |
| Included Components | 1 x 4387503 Bimetal Defrost Thermostat |
| Indoor Outdoor Usage | Indoor |
| Item Length | 7.8 Inches |
| LowerTemperature Range | 48 Degrees Fahrenheit |
| Manufacturer | BlueStars |
| Model | 4387503 WP4387503 PS11742474 AP6009317 |
| Model Name | 4387503 Refrigerator Bimetal Defrost Thermostat |
| Outer Material | Metal |
| Part Number | WP4387503 WP4387503 AP6009317 PS11742474 |
| Power Source | Battery Powered |
| Product Care Instructions | Wipe Clean |
| Reusability | Reusable |
| Unit Count | 1 Count |
| Upper Temperature Range | 62 Degrees Fahrenheit |
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