GE Profile UltraFast Combo: Troubleshooting Long Jeans... | appliancefaults.com

Technical Background:

The MCU (Main Control Unit) manages cycle times based on sensor inputs like thermistors, flow meters, and load weight. It also controls voltage to the water inlet valve, drain pump, and heating element. Incorrect sensor readings or voltage fluctuations can cause the MCU to miscalculate cycle durations.

Symptoms:

The GE Profile UltraFast Combo is taking an excessively long time (3 hours) to complete a jeans cycle, and other settings also seem to be affected by longer than normal cycle times.

Possible Causes:

Clogged lint filter restricting airflow.
Defective thermistor providing incorrect temperature readings.
Faulty flow meter not detecting proper water fill levels.
Partially blocked drain pump causing slow drainage.
Software glitch in the main control board (MCU).
Heating element malfunction (drying cycle extended).

Solution:

1

Unplug the unit and turn off the breaker.
2

Inspect and thoroughly clean the lint filter housing. Use a 1/4-inch nut driver to remove the access panel, if necessary.
3

Check the thermistor resistance using a multimeter. At room temperature (70°F), it should read approximately 10,000 ohms. Replace if significantly off.
4

Examine the drain pump for obstructions. Remove any debris using pliers.
5

Verify the water inlet valve screen is clear. Use a 5/16-inch socket to access the valve.
6

Check the heating element for continuity using a multimeter. Replace if open.
7

Reset the MCU by unplugging the unit for 5 minutes, then plugging it back in.

Safety Warning:

Always disconnect power to the appliance before performing any repairs. Lockout/Tagout (LOTO) procedures should be followed. Some components operate on 120V AC – use caution when testing live circuits.

Prevention:

Regularly clean the lint filter after each use. Periodically inspect and clean the drain pump filter. Use the appropriate amount of detergent to prevent buildup. Run a washer cleaning cycle monthly with a washing machine cleaner.

Expert Tip:

To enter service mode on this model, press and hold the Start/Pause and Temp buttons simultaneously for 3 seconds. This will allow you to run diagnostic tests and view error codes that may not be visible otherwise.

Frequently Asked Questions

•What is the correct thermistor part number for this model?

The correct thermistor part number can be found on the appliance's parts diagram, typically located inside the unit or available online from GE appliance parts retailers. Search using your full model number.

•How do I test the water inlet valve?

With the unit unplugged, use a multimeter to check for continuity across the valve's terminals. If there is no continuity, the valve is likely faulty. Also, check the voltage at the valve terminals (120V AC) during the fill cycle.

•Where is the MCU located on this model, and is it replaceable?

The MCU is typically located behind the control panel. Refer to the service manual for specific location and removal instructions. The MCU is replaceable, but it may require programming after installation.

GE Profile UltraFast Combo: Troubleshooting Long Jeans Cycle (3 Hours)

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the correct thermistor part number for this model?

•How do I test the water inlet valve?

•Where is the MCU located on this model, and is it replaceable?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: