Dryer Won't Start? WP3977456 Start Switch – Fix No-Start Fast

If your dryer powers on but won't start a cycle, the start switch is the most common culprit. In Whirlpool-built dryers, the start switch takes the full mechanical load every cycle — when it fails, pressing the start button does nothing and the drum never turns. ⚡ Common failure point in Whirlpool, Kenmore, Maytag, Amana, Roper, and Estate dryers. Part WP3977456 is the genuine OEM replacement that restores reliable cycle initiation immediately.

❓ Is This the Right Part?

This is the correct fix if ALL of the following are true:

• ✔ Dryer powers on — display or lights work normally
• ✔ Door latch is functional — door closes and latches securely
• ✔ Thermal fuse confirmed good — continuity tested OK
• ✔ Drive motor is not seized — drum turns freely by hand
• ✔ ONLY problem is pressing Start produces no response or click

Not sure? Send us your model number — we'll confirm before you order.

🔧 Common Symptoms

• Dryer won't start when button is pressed — most common complaint
• Start button feels loose, mushy, or has no tactile click
• Dryer starts intermittently — works sometimes, fails others
• Must hold button down unusually long to get cycle to begin
• No hum or motor sound when start is pressed
• Drum does not spin despite all other functions working

✔ If these symptoms match, the start switch is the most likely failed component.

✔ In most cases, replacing this switch restores normal operation immediately.

📦 Part Details

• Part Number: WP3977456
• Type: Dryer start switch — push-to-start momentary contact switch
• Replaces: OEM direct-fit assembly — supersedes 3977456, 898073, AH11742178, AH351870, AP6009036, EA11742178, EA351870, EAP11742178, EAP351870, PS11742178, PS351870 (no modification required)
• Brands: Whirlpool, Kenmore, Maytag, Amana, Roper, Estate, Crosley, Inglis, Admiral, Magic Chef

⚙️ Installation

Skill Level: EASY — 20–30 minutes. Unplug the dryer before beginning. Remove the control panel screws, disconnect the wiring harness from the old switch, snap the new switch into the panel bracket, reconnect the harness, and reassemble. No soldering or special tools required.

💡 Pro Tip

🔗 Model Hub Pages

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