Maytag Dryer Heating Element vs. Thermal Cut-Off:... | appliancefaults.com

Technical Background:

The Maytag dryer's MCU (Main Control Unit) controls the heating element via a relay. The thermal cut-off is a safety device that prevents overheating. It's a one-time fuse. If the dryer overheats, it cuts power to the heating element. The high-limit thermostat cycles the heating element on and off to maintain a safe temperature. The voltage path is: Breaker Panel -> MCU -> Relay -> Heating Element -> Thermal Cut-off -> Neutral.

Symptoms:

The dryer runs, but the clothes are not drying. The dryer may run longer than usual. You may also notice a burning smell if the heating element is failing. Sometimes the dryer shuts off before the cycle is complete.

Possible Causes:

Blown thermal cut-off due to restricted airflow.
Faulty heating element coil.
Defective high-limit thermostat.
Control board malfunction.
Loose wiring connections.

Solution:

1

Disconnect power to the dryer at the breaker panel. Use a non-contact voltage tester to verify power is off.
2

Access the heating element and thermal cut-off assembly, typically located behind the rear access panel. Use a 1/4-inch nut driver to remove the panel screws.
3

Visually inspect the heating element coil for breaks or signs of burnout. Replace if damaged.
4

Disconnect the wires from the thermal cut-off. Set your multimeter to the continuity setting (Ohms).
5

Test the thermal cut-off for continuity. A reading of OL (open loop) indicates a failed cut-off; replace it.
6

Test the heating element for continuity. A typical reading should be between 9 and 12 Ohms. An open circuit indicates a failed heating element.
7

Reassemble the dryer and restore power.

Safety Warning:

Disconnect power to the dryer at the breaker panel before performing any repairs. Lock Out / Tag Out (LOTO) procedures should be followed. Dryer circuits are typically 240V AC, which can be lethal. If you are not comfortable working with electricity, contact a qualified appliance repair technician.

Prevention:

Clean the lint filter after every load. Inspect and clean the dryer vent duct at least once a year to ensure proper airflow. Check the venting from the back of the dryer to the wall and from the wall to the outside. Use a dryer vent cleaning brush kit.

Expert Tip:

Many Maytag dryers have a diagnostic mode. Simultaneously press and hold the Start/Pause and End of Cycle Signal buttons for 3 seconds. This will display any stored error codes.

Frequently Asked Questions

•What is the proper amp draw for the heating element when the dryer is running?

The amp draw should be listed on the dryer's nameplate, typically around 20-25 amps at 240V AC. Use an amp meter to verify.

•How do I test the high-limit thermostat?

The high-limit thermostat is tested for continuity in the same way as the thermal cut-off. It should have continuity at room temperature. If it's open, it's faulty.

•What could cause the thermal cut-off to keep blowing?

Restricted airflow is the most common cause. Ensure the lint filter and vent duct are clean. Also, check for crushed or kinked venting behind the dryer.

Maytag Dryer Heating Element vs. Thermal Cut-Off: Multimeter Testing Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the proper amp draw for the heating element when the dryer is running?

•How do I test the high-limit thermostat?

•What could cause the thermal cut-off to keep blowing?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: