F35 Error Code on Whirlpool Washer

One of the error codes we’ve heard about lately on Whirlpool washing machines is the F35 error code.

A few things can cause this problem, and fortunately, they’re not a big deal in most cases. If you’re facing this problem and want to fix it, follow along in our F35 error code troubleshooting guide.

F35: The Water Level Pressure Switch Error

First, let’s talk about the washer’s anatomy.

F35 and the Analog Pressure Sensor

Clean the sensor

In the upper part of your Whirlpool washing machine lives the water level pressure switch. This sensor is connected to a hose at the bottom of your washer.

As the “water level” part of the name implies, the sensor works with the bottom hose to measure the amount of water in the tank so it can determine when to stop filling, stop draining, or start spinning.

As for the second part of the sensor’s name, it refers to how the pressure switch and bottom hose measure the water level through pressure, specifically air pressure. The more the water in the tank, the higher the pressure will be.

If the water level pressure switch sees that your washer is full for too long, it’ll give off the F35 error.

What Causes It?

The network of parts in the Whirlpool washer is interesting in how it functions like an electronic society with each unit doing its job and reporting to the control module (CCU) – the “boss” or “brains” of the washing machine.

In most instances of the F35 code, the problem is with the wiring or the sensor itself since either of these can create a messy communication signal.

As always with these Whirlpool errors, there’s a rare chance of CCU failure, which could spell trouble.

How to Repair the F35 Error

Now let’s look at a few solutions you can try to repair the malfunction.

Check the Control Board

the technician repairing defective main control board

First, you can try and clear the error, which will sometimes repair the F35 fault or other errors. To do this, unplug your washer and leave it for 15 minutes, then replug it again and see if the code is still on display.

If clearing doesn’t work, you’ll want to make sure the control board itself isn’t broken. To do this, we run diagnostics.

Running a diagnostics test is fast and easy. First, pick three buttons apart from the power, start, and cancel buttons, then press them three times in order. So if you pick the buttons A, B, and C, press ABC-ABC-ABC. And do it fast since you only have eight seconds to do it.

If the test doesn’t return any errors, then your CCU is fine, and you can move on. Otherwise, you’ll need to replace the CCU. Check your warranty with your main supplier to see if you’re eligible for a new replacement machine, which you might have to pay only a small fee for.

Inspect the Pressure Sensor

Sometimes the source of the problem will be a faulty pressure switch. You’ll need to check it quickly and have it replaced as soon as possible. A defective pressure switch can fry your heating element if it stays there for too long.

To take out the pressure switch for inspection, follow these steps:

  1. Unplug your washer and leave it for two minutes for the voltage to go down.
  2. Take off the top cover of the unit.
  3. Undo the screws holding the switch in place.
  4. Disconnect the hose and wires.
  5. Pull out the device.

Now that the part is out, clean it and inspect it for any visible damage.

Next, insert a small tube where the hose is and carefully blow on it. If you hear a click, then your device is working. Otherwise, you’ll need a new sensor.

Check the Wiring


If your CCU and pressure switch are okay, then the wires are most likely at fault here.

This step may be a bit complicated for many people, so if you’ve never fixed wiring before or have seen someone do it, you might want to call a local repair service.

But if you’re sticking around, start by inspecting the wires around the pressure switch. If a wire is disconnected or loose, you can reconnect it tightly into its place.

But if a wire is broken or corroded, you’ll need to replace or solder it.


Final Thoughts

In conclusion, the F35 error refers to a problem with the water level pressure switch, the part responsible for measuring the water level in your washer’s tank. This fault is often caused by a defective part or loose wiring.

To fix the problem, you can try rebooting the CCU, fixing the wiring, or replacing the pressure switch.

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