Roper Dryer Burning Smell on High Heat: Troubleshooting... | appliancefaults.com

Technical Background:

The Main Control Unit (MCU) controls the heating element via a relay. When high heat is selected, the MCU energizes the relay, sending 240V AC to the heating element. A thermistor monitors the exhaust temperature, and the MCU cycles the element on and off to maintain the desired temperature. Excessive lint or a faulty thermistor can cause overheating.

Symptoms:

The Roper dryer emits a burning smell, particularly when operating on the high heat setting. Clothes may also be excessively hot or have a scorched odor.

Possible Causes:

Lint accumulation in the dryer vent or internal components.
Faulty heating element.
Worn or damaged drum support rollers or belt.
Motor issues causing overheating.
Blocked exhaust vent.

Solution:

1

Disconnect power to the dryer at the breaker panel.
2

Disconnect the dryer vent from the back of the unit. Inspect for blockages and clean thoroughly.
3

Remove the rear access panel using a 1/4-inch nut driver. Check for excessive lint accumulation around the heating element and motor. Vacuum clean.
4

Inspect the heating element for breaks or hot spots. Use a multimeter to check for continuity; a reading of infinity indicates a failed element. Replace if necessary.
5

Examine the drum support rollers and belt for wear or damage. Replace any worn or damaged components.
6

Test the motor windings for shorts to ground using a multimeter. If shorted, replace the motor.
7

Reassemble the dryer, reconnect the vent, and restore power. Run a test cycle on high heat.

Safety Warning:

Always disconnect power to the dryer at the breaker panel before performing any maintenance or repairs. This appliance operates at 240V AC, which can be lethal. Lock Out/Tag Out (LOTO) procedures should be followed.

Prevention:

Clean the lint filter after every load. Inspect and clean the dryer vent at least once a year. Periodically check the internal components for lint buildup and vacuum as needed.

Expert Tip:

Some Roper dryers have a diagnostic mode. Press and hold the start button and one other button simultaneously for a few seconds to access it. Error codes displayed can help pinpoint the problem.

Frequently Asked Questions

•What is the typical resistance range for a working Roper dryer heating element?

A typical Roper dryer heating element should measure between 9 and 13 ohms. An open circuit (infinity) indicates a failed element.

•How do I check the dryer vent for blockages effectively?

Use a dryer vent cleaning kit with a rotating brush attachment connected to a drill. This will dislodge and remove lint buildup effectively. Also, ensure the outside vent cap is clear.

•What are the signs of a failing dryer motor?

Signs of a failing dryer motor include a humming noise, the drum not turning, overheating, and a burning smell. A multimeter can be used to check the motor windings for shorts or opens.

Roper Dryer Burning Smell on High Heat: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical resistance range for a working Roper dryer heating element?

•How do I check the dryer vent for blockages effectively?

•What are the signs of a failing dryer motor?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: