Kenmore Dryer Error Code PF: Power Failure Reset and... | appliancefaults.com

Technical Background:

The PF error code indicates the main control board (MCU) detected a loss of power during operation. The MCU monitors the incoming voltage and triggers the error when the voltage drops below a certain threshold. The MCU also stores settings and cycle configurations in memory, which can be corrupted by a power interruption.

Symptoms:

The dryer displays a "PF" error code on the control panel. The dryer may not start, or it may stop mid-cycle. The error often appears after a power surge or outage.

Possible Causes:

Intermittent power outage at the wall outlet.
Loose wiring connections inside the dryer.
Faulty door switch.
Defective main control board (MCU).
Tripped breaker at the breaker panel.
Overheating thermal fuse.

Solution:

1

Unplug the dryer from the wall outlet.
2

Check the breaker panel for a tripped breaker. Reset if necessary.
3

Using a multimeter, test the wall outlet for 120V AC on each leg (240V AC total).
4

Open the dryer and inspect the wiring harness for loose connections. Pay close attention to the connections at the main control board, motor, and heating element. Use a 1/4-inch nut driver to tighten loose connections.
5

Check the door switch for continuity when the door is closed using a multimeter. Should read closed. Replace if faulty.
6

Inspect the thermal fuse for continuity. It's usually located on the blower housing. Replace if open.
7

If the issue persists, suspect a faulty main control board (MCU). Replacement may be required. Replacement is best left to a qualified technician.

Safety Warning:

Disconnect power to the dryer at the breaker panel before performing any repairs. Use Lock-Out Tag-Out (LOTO) procedures to prevent accidental energizing of the circuit. High voltage is present inside the dryer; exercise caution.

Prevention:

Ensure the dryer is plugged into a dedicated outlet. Avoid using extension cords. Consider installing a surge protector. Periodically inspect the dryer vent for lint buildup, which can cause overheating.

Expert Tip:

Some Kenmore dryers have a service mode that allows you to clear error codes. Consult the service manual for your specific model to access service mode and perform a reset sequence. It often involves pressing specific button combinations.

Frequently Asked Questions

•What is the proper way to test the door switch?

Use a multimeter set to continuity. Disconnect at least one wire from the door switch. With the door open, the switch should show no continuity. With the door closed, the switch should show continuity (a closed circuit).

•Where is the thermal fuse located and how do I test it?

The thermal fuse is typically located on the blower housing. To test it, unplug the dryer. Disconnect the wires from the thermal fuse. Use a multimeter set to continuity. If the meter shows continuity, the fuse is good. If it shows no continuity, the fuse is blown and needs to be replaced.

•How do I access the service mode on my Kenmore dryer to clear the PF error?

The service mode access varies by model. Refer to the dryer's service manual or search online using your specific model number to find the correct button combination. Common methods involve pressing and holding specific buttons simultaneously for a few seconds, such as 'Start' and 'Cancel', or 'Cycle Select' and 'Power'.

Kenmore Dryer Error Code PF: Power Failure Reset and Start Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the proper way to test the door switch?

•Where is the thermal fuse located and how do I test it?

•How do I access the service mode on my Kenmore dryer to clear the PF error?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: