Description
🧾 Description
Maintain optimal drying temperature and protect your appliance from overheating with the WP3977678 Cycling Thermostat, a genuine OEM replacement manufactured by Whirlpool.
This thermostat plays a key role in your dryer’s heating system — it monitors air temperature inside the drum and cycles the heating element on and off to maintain consistent drying temperatures. When this component fails, the dryer may overheat, underheat, or leave clothes damp after a full cycle.
Built with high-quality, heat-resistant materials, the WP3977678 ensures accurate temperature regulation and dependable long-term performance. It’s an exact fit replacement that restores proper heating function and energy efficiency to your dryer.
⚠️ Note: Always disconnect power before servicing. Verify your model number before ordering to ensure compatibility.
⚙️ Features & Benefits
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✅ Genuine OEM part — factory-tested for quality, safety, and precise temperature control
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🌡️ Regulates dryer heat cycles for efficient and even drying
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💪 Durable metal housing resists heat deformation and wear
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🔧 Easy installation — direct fit with standard wire terminals
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🧺 Improves energy efficiency and extends dryer lifespan
⚠️ Common Symptoms
Replace the WP3977678 Cycling Thermostat if you notice:
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Dryer not heating properly (too hot or not hot enough)
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Long drying times or clothes staying damp
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Dryer overheats and shuts off early
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Inconsistent drying temperature or cycles that don’t complete normally
🔧 Compatible Model List
Compatible with a wide range of Whirlpool, Kenmore, Maytag, Amana, Crosley, Roper, and Estate dryers.
Common compatible models include (but are not limited to):
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Whirlpool: WED4815EW1, WED5000DW2, LER4634EQ2
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Kenmore: 110.66812690, 110.69822801, 110.60052990
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Maytag: MEDC215EW1, MEDB835DW4, MEDC400VW0
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Amana: NED4655EW1, NED4600YQ0, NED7200TW10
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Crosley: CDE4205AYW, CDE5500GW0
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Roper: RED4440VQ1, REX6634PQ1
🔁 Cross Reference
Replaces and supersedes part numbers:
3977678, 3392519, 3387134, WP3977678VP, AP6009189, PS11742199
🧩 Compatibility Notes
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Confirm your dryer’s model number label (inside the door frame or back panel) before ordering.
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The thermostat is usually located on the blower housing or internal exhaust duct.
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For best performance, inspect related parts such as the thermal fuse (WP3976569) and high-limit thermostat (WP3976570) — replacing them together ensures balanced temperature regulation and prevents future breakdowns.
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Clean dryer vents regularly to maintain proper airflow and avoid overheating.