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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 fits a very large range of Whirlpool, Kenmore, Roper, Estate and Sears Coldspot dryers, which is the reason this fuse costs less than a bag of groceries — it’s made in volumes almost no other appliance part reaches. Confirm it against your own model before ordering, and read the section below on why it blew, because the fuse is rarely the whole story.

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 on many models, sits on the element housing and rode out the same overheat that killed the fuse. It’s frequently sold as a thermostat and fuse kit for a couple of dollars more than the fuse alone, which is a bargain measured against pulling the back panel off a second time in three weeks.

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.

Common Questions

Can a thermal fuse be reset?

No, and this is the most common misunderstanding about the part. A thermal fuse is a one-shot device — an internal link melts at a set temperature and stays open forever. There is no button, no cooling-off period and no trick. If it has opened, it gets replaced.

Where is the thermal fuse on a Whirlpool dryer?

On the blower housing or the exhaust duct, behind the rear access panel, held by a single screw with two wires on spade terminals. It is a small white or cream plastic body about an inch long. On some Whirlpool platforms there is a second, similar-looking thermal cut-off on the heater housing — check both before you decide which part failed.

Will the dryer still tumble with a blown thermal fuse?

It depends on where the fuse sits in the circuit for your model. On many Whirlpool and Kenmore dryers the fuse is wired into the motor circuit, so a blown fuse means the dryer is completely dead. On others it only interrupts the heater and the drum keeps turning. Both behaviours are normal, and neither tells you the fuse is good.

How do I know part 3392519 fits my dryer?

Check your own model number rather than the brand. That number covers a very wide range of Whirlpool-platform dryers including many Kenmore, Roper and Estate units, but coverage lists change and Kenmore units were built by more than one manufacturer. Look up your model at searspartsdirect.com and confirm before ordering.

How long does the replacement take?

Twenty to thirty minutes for someone who has never done it, most of that spent getting the back panel off and on. The fuse itself is one screw and two connectors.

Why did the fuse blow in the first place?

Almost always a restricted exhaust. Lint accumulates in the duct, hot air cannot leave fast enough, and the temperature at the blower climbs past the fuse rating. The fuse is the last thing standing between that and a fire, which is why it is worth treating a blown one as a vent problem rather than a parts problem.