Hotpoint Dryer Screeching Noise Under Heavy Load:... | appliancefaults.com

Technical Background:

The dryer's motor control unit (MCU) powers the drive motor. The motor turns the drum via a belt tensioned by the idler pulley. Drum support rollers allow the drum to rotate freely. Voltage paths include 120V AC for the motor control circuits and 240V AC (two phases of 120V) for the heating element.

Symptoms:

The US homeowner observes a loud screeching noise emanating from the Hotpoint dryer, specifically when drying heavy loads like towels or blankets.

Possible Causes:

Worn drum support rollers
Worn idler pulley bearing
Worn or glazed blower wheel
Motor bearings failing
Worn drum seal

Solution:

1

Disconnect power to the dryer at the breaker panel. Verify 0V AC with a multimeter at the dryer receptacle.
2

Remove the dryer cabinet panels to access the internal components. Usually using a 1/4-inch nut driver.
3

Inspect the drum support rollers for wear, flat spots, or looseness. Spin each roller by hand to check for noise.
4

Check the idler pulley for smooth operation and excessive play. Replace if noisy or wobbly.
5

Inspect the blower wheel for obstructions and ensure it spins freely. Check the motor bearings for noise or resistance.
6

Inspect the drum seal around the drum for excessive wear or damage. The seal should not be rubbing or torn.
7

Replace any worn or damaged components. Reassemble the dryer and test with a heavy load.

Safety Warning:

Lock Out/Tag Out (LOTO) the dryer at the breaker panel before performing any repairs. Dryers operate on 240V AC, which can cause serious injury or death. If unsure, call a qualified appliance repair technician.

Prevention:

Clean the lint filter after every load. Periodically inspect the dryer vent for obstructions and clean it thoroughly. Annually, lubricate the drum support rollers and idler pulley bearing with high-temperature grease.

Expert Tip:

Many Hotpoint dryers have a diagnostic mode. Consult the service manual to learn the specific key sequence to enter service mode and retrieve error codes. Some dryers may also have a belt tension adjustment that can be loosened and tightened.

Follow-up Questions:

Frequently Asked Questions

•How do I properly tension the dryer belt?

The belt should be tight enough to prevent slippage but not so tight that it puts excessive strain on the motor and bearings. Refer to the service manual for the specific tension measurement, often described as the amount of deflection when pressed with a specific force (e.g., 1/2 inch deflection with 5 lbs of force).

•What type of grease should I use to lubricate the rollers and idler pulley?

Use a high-temperature, lithium-based grease specifically designed for appliance applications. This type of grease can withstand the heat generated by the dryer and will not break down quickly. Do not use petroleum based lubricants as these can degrade rubber components.

•How do I access the drum support rollers on my Hotpoint dryer?

Generally, you will need to remove the front panel of the dryer to access the drum support rollers. This usually involves removing screws located around the perimeter of the panel. Be sure to support the drum while removing the panel to prevent it from dropping.

Hotpoint Dryer Screeching Noise Under Heavy Load: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I properly tension the dryer belt?

•What type of grease should I use to lubricate the rollers and idler pulley?

•How do I access the drum support rollers on my Hotpoint dryer?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: