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A failed timer prevents the electrical circuit from completing when the knob is turned, so the dryer does not start. Replacing the timer restores normal startup.
If the timer motor fails to advance, the cycle never reaches the OFF position and the dryer runs indefinitely. A new timer reestablishes proper automatic shutoff.
A worn or internally broken timer cam won't progress through the timed cycle, leaving clothes wet or the machine stuck mid-cycle. This is the most common symptom of a failed timer.
Physical failure of the timer's internal gear (stripped teeth or broken shaft engagement) causes the knob to spin without controlling any function. Replace the entire timer assembly.
An erratic timer motor causes incorrect cycle duration — clothes come out still damp or are over-dried. Replacing the timer restores precise, programmed drying times.
💡 Pro Tip: How to Know Your Dryer Timer Has Failed
Your part is likely the culprit if you notice any of the following:
⚠️ Dryer will not start at all when the timer knob is turned
⚠️ Dryer runs continuously and never shuts off on its own
⚠️ Timer knob is stiff, stuck, or spins freely without engaging the gear mechanism
⚠️ Drying cycle does not advance or ends too early / runs far longer than programmed
🔍 Diagnostic tip: Before replacing the timer, verify the dryer is heating properly — the timer motor relies on correct heat for the automatic cycle to advance. Test the timer with a multimeter against the wiring diagram. If all other components (thermal fuse, heating element, start switch) check out but the cycle still won't advance, the timer is your confirmed culprit.
📦 What's in the Box
✅ 1× Dryer Timer 234D2377P004 / TMD14M30 (updated terminal layout, replaces TMD16M12 / 234D2377P003)
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Disclaimer: Compatibility information, part numbers, and model fitment data on this page are sourced from manufacturer databases and third-party references. While we strive for accuracy, please verify your appliance model number before ordering. Heima is not responsible for errors or omissions in compatibility listings.
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