Hotpoint Dryer Overheating and Burning Smell:... | appliancefaults.com

Technical Background:

The dryer's Main Control Unit (MCU) relies on temperature sensors (thermistors and thermostats) to regulate the heating element. These sensors provide voltage signals back to the MCU. A malfunctioning sensor, a shorted heating element, or a blockage in the venting can disrupt this process, leading to overheating. Proper venting is crucial for heat dissipation. 120V AC is supplied to the heating element.

Symptoms:

The Hotpoint dryer is getting excessively hot during operation, and there is a distinct burning smell, likely resembling burning lint. Clothes may be excessively dry or scorched.

Possible Causes:

Restricted airflow due to lint build-up in the lint screen, ductwork, or blower housing.
Malfunctioning thermostat or thermistor causing inaccurate temperature readings.
Faulty heating element continuously generating heat.
Defective cycling thermostat not regulating the heating element properly.
Blocked exhaust vent restricting airflow.
Failed high-limit thermostat.

Solution:

1

Unplug the dryer from the outlet.
2

Inspect and thoroughly clean the lint screen. Ensure it is free of any obstructions.
3

Disconnect the exhaust duct from the dryer and the wall. Check for and remove any lint build-up using a vacuum or dryer vent cleaning kit.
4

Access the dryer's internal components by removing the back panel using a 1/4-inch nut driver. Locate the thermostat and high-limit thermostat on the blower housing. Use a multimeter to test for continuity. Replace if open.
5

Inspect the heating element for any signs of damage, such as breaks or shorts. Test with a multimeter for proper resistance (typically around 8-12 ohms). Replace if defective.
6

Check the cycling thermostat for proper operation. If possible, test its functionality with a multimeter. A normal reading should be continuity at room temperature.
7

Reassemble the dryer and test its operation, monitoring the temperature to ensure it is within the normal range. Use a temperature probe to verify the dryer doesn't exceed 160 degrees Fahrenheit.

Safety Warning:

Disconnect power (LOTO - Lock Out Tag Out) to the dryer at the breaker panel before performing any repairs. Dryers operate on 240V AC, which can cause serious injury or death.

Prevention:

Clean the lint screen after every load. Regularly inspect and clean the dryer vent ductwork at least once a year. Check the outside vent for obstructions.

Expert Tip:

Many Hotpoint dryers have a diagnostic mode. Consult the service manual for the specific key sequence to enter diagnostic mode and retrieve error codes, which can help pinpoint the problem. Often a button press combination of 'More Time' and 'Less Time' held for 3 seconds will trigger it.

Frequently Asked Questions

•What is the proper way to clean a dryer vent duct?

The best way to clean a dryer vent duct is to use a dryer vent cleaning kit, which includes a long brush attachment for a drill or vacuum. Disconnect the duct from both the dryer and the wall, and thoroughly clean the entire length of the duct. Ensure there are no sharp bends or kinks in the ductwork.

•How do I test the heating element with a multimeter?

First, unplug the dryer. Then, disconnect the wires from the heating element terminals. Set your multimeter to the ohms setting. Place one probe on each terminal of the heating element. A typical reading should be between 8 and 12 ohms. An open circuit (no continuity) indicates a defective heating element.

•Where can I find a replacement thermostat for my Hotpoint dryer?

Replacement thermostats can be found at most appliance parts retailers, both online and in brick-and-mortar stores. You will need the model number of your dryer to ensure you get the correct replacement part. Also, Sears Parts Direct, RepairClinic.com, and AppliancePartsPros.com are good sources.

Hotpoint Dryer Overheating and Burning Smell: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the proper way to clean a dryer vent duct?

•How do I test the heating element with a multimeter?

•Where can I find a replacement thermostat for my Hotpoint dryer?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: