Hotpoint Washer Error Code OF: Overflow Protection... | appliancefaults.com

Technical Background:

The Main Control Unit (MCU) monitors the water level sensor to prevent overflows. The water level sensor sends a voltage signal to the MCU. If the voltage exceeds a pre-determined threshold, the MCU interprets this as an overflow condition and displays the 'OF' error. This error can be triggered by a number of issues, including a defective sensor, a faulty inlet valve that won't shut off, a clogged drain, or even a malfunctioning MCU itself.

Symptoms:

My Hotpoint washer shows error code OF on the display. The washer tub is full of water, and it won't drain. It just beeps at me.

Possible Causes:

Blocked drain hose
Faulty water level sensor
Defective water inlet valve
Problem with the drain pump
Clogged air dome
Malfunctioning MCU (Main Control Unit)

Solution:

1

Disconnect the washer from the power outlet.
2

Inspect the drain hose for kinks or clogs. Disconnect it from the drainpipe and clear any obstructions.
3

Check the water inlet valve for proper closing. If it continues to drip even when the washer is off, replace it.
4

Examine the water level sensor and its wiring harness. Use a multimeter to test for continuity. A typical reading would be between 1k and 5k ohms depending on water level.
5

Inspect the drain pump for debris. Remove any obstructions and test the pump's functionality with a multimeter set to ohms. Look for a reading between 10 and 20 ohms.
6

Locate the air dome connected to the tub. Disconnect and clear any blockage that may exist. This is usually a small plastic chamber with a hose running to the pressure switch/sensor.
7

If all else fails, replace the MCU. This may require programming, so consult the service manual.

Safety Warning:

Always disconnect the appliance from the power outlet before performing any repairs. Use Lock-Out Tag-Out (LOTO) procedures to prevent accidental power-up. Some components may retain a high voltage charge even after disconnection. Exercise caution when working with electrical components.

Prevention:

Regularly clean the drain pump filter (if equipped) and inspect the drain hose for any signs of damage or blockage. Avoid overloading the washer, which can strain the drain pump.

Expert Tip:

To enter the service mode on some Hotpoint washers, press and hold the Start/Pause and Water Level buttons simultaneously for 3 seconds while the machine is in standby. This allows you to run diagnostic tests.

Frequently Asked Questions

•How do I access the drain pump to check for clogs?

The drain pump is typically located at the bottom front of the washer, behind an access panel. You may need a 1/4-inch nut driver to remove the screws holding the panel in place. Be prepared for some water spillage when you open it.

•Where is the water level sensor located, and how can I test it?

The water level sensor is usually located at the bottom of the washer, often near the base. It may have a small hose connected to the tub. Disconnect the washer and test the sensor using a multimeter set to ohms, while slowly changing the water level. The resistance should vary as the water level changes.

•What voltage should I expect to see at the water inlet valve?

The water inlet valve is typically controlled by 120V AC. When the washer is filling, you should read 120V AC across the valve terminals using a multimeter. When the valve is supposed to be closed, you should read close to 0V AC.

Hotpoint Washer Error Code OF: Overflow Protection Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the drain pump to check for clogs?

•Where is the water level sensor located, and how can I test it?

•What voltage should I expect to see at the water inlet valve?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: