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The Whirlpool 3392519 thermofuse (also fits many Kenmore dryers) is one of the most commonly replaced dryer parts in the US. If your Whirlpool or Kenmore dryer runs but won’t heat, there’s a very good chance this is your fix.

What Is a Thermofuse?

A thermofuse is a one-shot thermal safety device. If your dryer overheats — usually from a blocked exhaust vent — the thermofuse blows and permanently breaks the heating circuit. Unlike a breaker, it can’t be reset. Once it blows, it must be replaced.

Part #3392519 is the thermal fuse that fits a very large range of Whirlpool, Kenmore, Roper, Estate, and Sears Coldspot dryers.

Check current price of Whirlpool 3392519 thermofuse on Amazon

How to Test the Thermofuse

  1. Unplug the dryer
  2. Remove the back panel (usually 6–8 Phillips screws)
  3. Locate the thermofuse — it’s a small oval device mounted on the exhaust duct or heating element housing, connected by two wires
  4. Disconnect the wires
  5. Set your multimeter to continuity (or lowest resistance)
  6. Touch the probes to each thermofuse terminal
    • Good fuse: Continuity / beep / near-zero ohms
    • Bad fuse: No continuity / open circuit

If it’s bad, the part is under $10 on Amazon and takes about 20 minutes to swap.

Replacement Steps

  1. Note or photograph the wire connections
  2. Remove the two screws or clips holding the thermofuse
  3. Install the new thermofuse in the same position
  4. Reconnect the wires
  5. Reassemble the back panel and plug in

What to Buy at the Same Time

When you’re replacing the thermofuse, consider also grabbing:

High-limit thermostat — The thermal limiter (part #279816 for many models) is another thermostat on the element housing. If the thermofuse blew due to overheating, the high-limit thermostat may be marginal too. They’re cheap, and replacing both at once saves a second disassembly.

Check Whirlpool thermostat kit on Amazon

Why Did It Blow in the First Place?

The most common cause is a clogged dryer vent. Lint builds up in the exhaust duct over time and restricts airflow. The dryer overheats, and the thermofuse blows as a safety measure.

If you just replace the thermofuse without cleaning the vent, the new fuse will blow again — often within weeks. Clean the full vent run before you finish the repair. See our dryer vent cleaning guide for the right way to do it.

Models This Part Fits

Part #3392519 is compatible with a very wide range of Whirlpool-platform dryers, including:

  • Whirlpool (most electric models from 1990–present)
  • Kenmore (Sears) — most models with 110, 417, or 796 prefix
  • Maytag (some models)
  • Roper
  • Estate
  • Admiral

Always verify against your full model number before ordering. The model number sticker is typically on the inside of the door frame or on the back of the unit.

Need Help?

If you’ve replaced the thermofuse and the dryer still won’t heat, or if you’d prefer a professional handle it, give us a call at 405-730-9131. We carry this part on our trucks and can usually knock out the repair in one visit.