Dryer High-Limit Thermostat Replacement For: Whirlpool 3977767

Dryer High-Limit Thermostat – Whirlpool

This ERP aftermarket high-limit thermostat helps protect a Whirlpool dryer by opening the heating circuit when the listed limit temperature is reached. A failed thermostat can contribute to overheating, no heat, or interrupted cycles. This is a direct replacement for the listed ERP and Whirlpool references. The ERP catalog designation is L221-65F, so verify the original rating, terminal layout, and complete appliance model before ordering.

Compatible Part Numbers

• ER3977767
• 3977767
• L221-65F

Compatible Models

• Fits various models. Please verify compatibility with us before ordering

Key Features

• Direct replacement: Replaces ERP ER3977767 and Whirlpool 3977767 high-limit thermostat references.
• High-limit protection: Opens the heating circuit at the listed L221-65F catalog rating.
• Reliable safety function: Helps prevent continued heating when the thermostat reaches its rated limit.
• Installation ease: Match the original rating, terminals, and mounting before replacing.

Fixes These Symptoms

• Dryer overheats or runs too hot.
• Dryer shuts off or stops heating during a cycle.
• Dryer has no heat because the thermostat has failed open.
• Thermostat tests out of range or has damaged terminals.

Compatible Brands

• Whirlpool

Product Details

• Manufacturer: ERP
• Part type: Dryer high-limit thermostat
• Catalog designation: L221-65F
• Part numbers: ER3977767, 3977767

Always verify your model number before ordering. Check the label inside the dryer and compare the original thermostat rating, terminals, and mounting.

For washer and dryer cleaning products, see affresh.

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