What Frigidaire Dishwasher Uo Code Means & How To Fix It?

Trying to start the wash cycle in your Frigidaire dishwasher and it throws a Uo error code? That can be upsetting especially if your dishwasher is quite new.

The Frigidaire dishwasher Uo code indicates issues within the vent assembly system which seems to be stuck open. Several reasons including a bad vent assembly or internal faults can trigger the dishwasher to display a Uo error code.

You might go through this article to get in-depth knowledge of the Uo code. It will help you to understand and troubleshoot the code, spending much less than usual.

What Does Frigidaire Dishwasher Uo Code Mean?

In simple terms, the Uo code on Frigidaire dishwasher means that the vent assembly of the dishwasher is faulty or not functioning properly.

To understand what it means and how it gets faulty, you must know the working principle of the vent and fan assembly. Frigidaire dishwashers use heated water for a better cleaning of the dishes.

During the drying cycle, the accumulated steam and moisture inside the dishwasher could be problematic. Besides, it can also hamper the electronics of the dishwasher as well.

That is why Frigidaire dishwashers come with a vent assembly assisted by a small yet powerful fan. It helps to eliminate steam and moisture from inside the washer to keep the dishes and system dry.

For starting a wash cycle vents need to stay shut. It opens and closes following a command from the control board. 

Hence, when the onboard programmed computer detects that the vent is still open it fails to start a wash cycle and shows the error code “Uo”.

What Causes Uo Code In A Frigidaire Dishwasher?

Several reasons can trigger the vent to not close which results in Uo code. Before getting to fix the code check out the causes for planning.

• System glitch
• Vent assembly wiring issue
• Clogged sensor, valve, or rubber vent
• Damaged vent assembly

How To Troubleshoot Frigidaire Dishwasher Uo Code?

It’ll be better for you to start with simple fixes to eliminate the primary causes of the Uo code to save money and time.

1. Reset Your Dishwasher

Although it is highly unlikely, some users have reported that the Frigidaire dishwasher gets attacked by a system glitch. Hence, it shows a false Uo code and prevents the dishwasher from running.

To eliminate the issue, all you need is to cancel any existing cycle. Turn off the dishwasher and unplug it from the main plug board.

Nevertheless, you can also shut the circuit breaker for the dishwasher. Wait around 5-10 minutes and reboot followed by starting a fresh wash cycle.

2. Inspect & Repair Wiring Connections

The vent assembly is connected to the main control board through a wiring harness. It seems that the connecting terminals on each side of the wiring harness become unresponsive.

Before getting into the trickiest steps, you can try cleaning the wiring harness and reconnecting it to the assembly.

Check and remove any rust or corrosion on the electrical terminals that might hinder signal coming to and from the vent assembly.

Moreover, look for any visual damage on the wires such as broken or burnt wires. You can use a multimeter to ensure there’s an electric continuity between the two ends.

Lastly, reconnect and reassemble everything to check if the code is cleared or not.

3. Clean Vent Assembly Internally

The Frigidaire dishwasher vent assembly is composed of different small and moving parts. This includes a fan motor, a valve to open or close the vent, springs, and an optical sensor.

Since the vent is exposed inside the dishwasher it acts as a passage to carry out dust, moisture, and steam.

As a result, over time soap, foam, junk, etc. accumulate inside the housing and interrupt the nominal functionality of the vent. This causes the control board to think the vent is open and throws the Uo error code.

Remove the vent assembly and its housing by unclipping the fasteners. Clean all junk inside the chamber to make a clear path for the vent to move and for the optical sensor to work.

Moreover, check out the rubber seal that acts as a gasket. Clean the gasket and reassemble it properly if it’s out of the frame. Afterward, look for a small spring that assists in opening and closing the vent when the fan works.

Check if the spring is not over or under-stretched. Finally, reassemble the vent, reconnect, and restart the dishwasher to see if the problem exists.

4. Replace Vent Assembly Unit

If none of the above methods can clear the Uo code in your Frigidaire dishwasher, replacement is the last resort. The process to replace the vent assembly is straightforward, hence you need not call a repairman and pay a lot.

All you need is the OEM replacement part from the genuine supplier. Refer to your dishwasher’s model and part number of the OEM. Pull off the dishwasher from the cabinet and open the door.

Look underneath towards the top right corner. Remove the plastic ring or screw cap securing the vent. Pull off the vent assembly and remove the connecting wire harness.

Connect the new part and secure it in place by installing the plastic screw underneath the dishwasher. Reset and reboot your Frigidaire dishwasher, and you’ll see no error code on the display.

At this moment, your Frigid dishwasher Uo code would have been cleared. But if not then there could be an issue with the main control board which might require replacement as well. However, it is a very rare and unlikely scenario.

How Can You Prevent Frigidaire Dishwashers From Uo Error Code?

The vent assembly of the Frigidaire dishwasher seems to be of low quality. But, if you follow some basic measures, you can avoid getting the Uo code sooner.

• Clean the vent, fan, and motor periodically.
• Do not let any soap or junk clog the vent
• Keep your dishwasher dry to avoid corrosion and rust on the wiring harness.
• Inspect the solenoid, valve, and sensor regularly.

FAQs

The following answered queries from the users would guide you more about the Uo code on Frigidaire dishwasher.

Final Words

A lot of users have complained about the Frigidaire dishwasher Uo code randomly displaying and interrupting the workflow.

Although, with some minimal effort and taking preventive measures you can easily get your washer up and running.

However, if your dishwasher has a warranty available in its arsenal, it is recommended to claim replacement rather than trying to fix it all alone.