Roper Dryer Overheating and Burning Lint Smell:... | appliancefaults.com

Technical Background:

The dryer's main control unit (MCU) regulates the heating element based on temperature readings from thermostats. The operating thermostat cycles the heating element to maintain the set temperature. The high-limit thermostat is a safety device that cuts power to the heating element if the dryer overheats. Voltage paths include 120V AC to the motor, heating element, and control board.

Symptoms:

The homeowner observes that the Roper dryer is getting excessively hot during operation. There is also a distinct burning smell, reminiscent of burning lint, emanating from the dryer.

Possible Causes:

Clogged lint filter or exhaust duct
Faulty operating thermostat
Defective high-limit thermostat
Malfunctioning heating element
Blocked blower wheel

Solution:

1

Disconnect the dryer from the 120V AC outlet. Use a non-contact voltage tester to confirm power is off.
2

Disconnect the exhaust duct from the dryer and the wall. Visually inspect for lint buildup.
3

Remove the lint filter and clean it thoroughly with a vacuum cleaner and a brush.
4

Access the thermostats (usually located near the heating element). Use a multimeter to check continuity. They should read closed at room temperature. Replace if open.
5

Access the heating element. Use a multimeter to measure resistance. A typical heating element reads between 8 and 12 ohms. Replace if open or shorted to ground.
6

Access and inspect the blower wheel for any obstructions that may be restricting airflow. Common tools needed: 1/4-inch nut driver, 5/16-inch socket.
7

Reassemble the dryer and test operation. Check the exhaust temperature with a temperature probe. It should be around 160-180 Fahrenheit.

Safety Warning:

Disconnect power to the dryer before performing any repairs. Lockout/Tagout (LOTO) procedures must be followed. Be aware of high voltage components. Always verify power is off before touching any internal components.

Prevention:

Clean the lint filter after every load. Inspect and clean the exhaust duct at least once a year. Ensure proper ventilation to prevent lint buildup.

Expert Tip:

Some Roper dryers have a diagnostic mode. Simultaneously press and hold the 'Start/Pause' and 'End of Cycle' buttons for 3 seconds to enter the diagnostic mode. This can reveal error codes related to overheating.

Frequently Asked Questions

•How do I access the heating element on my Roper dryer?

Typically, you'll need to remove the rear access panel of the dryer. This usually involves removing several screws with a 1/4-inch nut driver. Be careful not to damage any wires when removing the panel. Some dryers may require removing the top panel instead. Consult your dryer's service manual, if available.

•What is the proper way to clean the exhaust duct?

Disconnect the duct from both the dryer and the wall. Use a specialized dryer vent cleaning brush kit or a vacuum cleaner with a hose attachment to remove lint buildup. Ensure the exterior vent flap opens and closes freely.

•What resistance value should I expect from a good operating thermostat?

A functional operating thermostat should show close to zero ohms (continuity) at room temperature. An open circuit (infinite resistance) indicates a faulty thermostat that needs to be replaced.

Roper Dryer Overheating and Burning Lint Smell: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the heating element on my Roper dryer?

•What is the proper way to clean the exhaust duct?

•What resistance value should I expect from a good operating thermostat?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: