Kenmore Dryer Cycling & High-Limit Thermostat Replacement

Kenmore Dryer Cycling & High-Limit Thermostat Replacement — What This Part Does

The cycling thermostat opens and closes to regulate drum temperature during normal drying, typically cycling in a range around 125–160°F at the exhaust vent to maintain heat. The high-limit thermostat is a safety cutoff on the heater housing that opens if temperatures get too high and closes again once it cools (around 80°F in some models). When a cycling thermostat fails, the dryer may not heat or may not cycle properly. When a high-limit thermostat fails or opens repeatedly, there is usually an underlying overheating problem.

Thermostats fail because of restricted venting or lint buildup causing poor airflow and elevated heater temperatures, a faulty heating element that is shorted or contacting the housing, or loose and corroded terminals that create heat and intermittent failure. A thermostat can also stick open or closed and no longer switch at the correct temperature. You will not see a fault code on the thermostat itself. The symptom is typically no heat, overheating, short cycling, or a thermal cut-off or high-limit opening repeatedly.

Jump to Replacement Steps

Signs It Needs Replacing

• Dryer runs but produces no heat The drum tumbles normally but clothes stay cold or damp, indicating the cycling or high-limit thermostat is stuck open and not allowing current to the heater element.
• Dryer overheats or shuts off mid-cycle Clothes come out too hot or the cycle stops early because the high-limit thermostat is opening to protect against excessive heat.
• Dryer cycles on and off rapidly (short cycling) Heat comes on and off in very short bursts because the cycling thermostat is failing to regulate temperature properly or the high-limit is tripping repeatedly.
• Dryer takes much longer to dry clothes A load that normally takes 45 minutes now takes two hours because the thermostat is not maintaining steady heat.
• Exhaust vent temperature is erratic or out of range Measuring the vent with a thermometer shows temperatures well outside the normal 125–160°F cycling range during a timed heat cycle.
• Thermostat does not show continuity when tested Using a multimeter on ohms or continuity, the thermostat stays open when it should be closed or does not open when heated to its trip point.

How to Replace It

1. Unplug the dryer or shut off power at the breaker before starting any component work.
2. Check airflow and venting first by inspecting the lint trap, blower housing, exhaust duct, and external vent for restriction or buildup, and clean thoroughly before replacing any thermostat.
3. Remove the lower access panel or front panel (depending on model) to access the blower housing and heater assembly.
4. Locate the cycling thermostat on or near the blower housing and the high-limit thermostat on the heater housing, noting the wire terminal positions.
5. Test each thermostat with a multimeter on continuity or ohms: the thermostat should show continuity when cool and open when heated to its trip point, then regain continuity after cooling.
6. Visually inspect the heating element for breaks, sagging coils, or contact with the housing, and check continuity from element to ground to rule out a short or ground fault before replacing the thermostat.
7. Disconnect the wire terminals from the faulty thermostat, remove the mounting screws or clips, and pull the old thermostat from its bracket.
8. Install the new thermostat in the same position, secure with screws or clips, and reconnect the wire terminals snugly to prevent future overheating from loose connections.
9. Reassemble all panels, restore power, and run a timed heat cycle while measuring exhaust temperature to verify the dryer cycles properly in the 125–160°F range and does not overheat.

The Part You Need

Related Error Codes

If this part is failing you may also see one of these codes:

• Kenmore Dryer F01 error code
• Kenmore Dryer F20 error code
• Kenmore Dryer F22 error code
• Kenmore Dryer F23 error code
• Kenmore Dryer F26 error code
• Kenmore Dryer F28 error code
• Kenmore Dryer F29 error code
• Kenmore Dryer F30 error code
• Kenmore Dryer F31 error code
• Kenmore Dryer F70 error code

When to Call a Pro

If you are uncomfortable working with electrical connections or if the dryer continues to overheat or trip the high-limit thermostat after replacement, call a professional. Repeated high-limit trips mean there is an underlying problem such as a shorted element, blocked vent, or faulty blower that must be diagnosed and corrected. A technician can measure operating temperature, test all heater circuit components, and verify airflow to prevent future failures.