# How to Fix Whirlpool Error F35 (Analog Pressure Sensor)
The F35 error code is one of the more specific faults on Whirlpool washing machines, primarily impacting Cabrio and similar top-load models, though it can appear on others. This guide will help you diagnose and resolve the issue, focusing on the most likely culprit: the Pressure Switch.
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## 1. Explanation: What does the F35 code mean?
The Whirlpool F35 error code indicates a failure in the **Analog Pressure Sensor** circuit.
**In plain English:** Your washing machine is unable to accurately determine or verify the water level inside the drum.
This sensor is critical because the washer relies on it to decide when to stop filling, how much water to use for specific cycles, and to ensure proper draining. If the main control board (CCU) receives an abnormal or completely null signal from the sensor, it immediately flags F35 and halts the cycle to prevent overfilling or damage.
In the vast majority of cases, the problem is not the main CCU, but the **Pressure Switch** component itself, as the sensor is integrated into that switch.
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## 2. Step-by-Step Fix: How to Diagnose F35
Before ordering any parts, follow these steps to eliminate common causes and verify the failure of the pressure switch.
### Step 1: Perform a Hard Reset (5 Minutes)
Often, transient electrical noise or temporary logic errors can trigger F35.
1. **Unplug the washing machine** completely from the wall outlet.
2. Wait 5 minutes. (This allows the main control board capacitors to discharge and clear stored error logic.)
3. Plug the machine back in and attempt to run a short cycle (e.g., Rinse & Spin).
4. If the error persists, proceed to Step 2.
### Step 2: Access the Pressure Switch and Inspect the Air Tube
The pressure switch works by monitoring the air pressure in a narrow hose that connects the switch to the bottom of the outer tub. As water fills the tub, it compresses the air in the hose, sending a pressure signal to the switch.
1. **Safety First:** Unplug the washer before opening any panels.
2. **Access the Switch:** Depending on your model (usually top-load), you will need to remove the back panel or lift the entire top lid. The Pressure Switch is typically located near the control panel or toward the back of the washer frame.
3. **Inspect the Pressure Hose:** Locate the small, rubber or plastic tube connected to the pressure switch.
* **Check for Kinks:** Ensure the hose is not crimped, folded, or pinched by the frame.
* **Check for Blockages:** Disconnect the hose from the pressure switch and blow gently through it. You should hear air bubbling at the bottom of the wash tub. If you encounter significant resistance, the hose or the connection point at the tub is clogged (often by soap residue, lint, or foreign objects). Clear any obstruction.
4. **Inspect Wiring:** While you are near the switch, inspect the wiring harness connector. Ensure it is firmly seated and that none of the individual wires appear frayed or corroded.
### Step 3: Replace the Pressure Switch (The Primary Solution)
If the hard reset failed and the hose is clear, the internal analog sensor within the pressure switch has failed and must be replaced.
**Tools needed:** Screwdriver (usually Torx or Phillips), replacement Pressure Switch.
1. **Locate the Switch:** Identify the pressure switch component. It usually connects to the air hose and a wiring harness.
2. **Document Connections:** Before removing anything, take a photo of the connections (wiring harness and air hose) for reference.
3. **Remove the Old Switch:** Disconnect the air tube and the wiring harness. The switch is usually held in place by one or two screws or a small retaining clip.
4. **Install the New Switch:** Connect the wiring harness and the air tube securely to the new pressure switch. Secure the new switch onto the washer frame.
5. **Test:** Reassemble the washer (if necessary for testing) and plug it back in. Run a test cycle. The F35 error should be cleared.
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## 3. Call to Action
If diagnosis confirms the need for replacement, finding the exact part number for your model is crucial. However, the component is standardized across many models.
**Check the price for a replacement Pressure Switch here: https://www.amazon.com/s?k=Whirlpool+Pressure+Switch&tag=trivian-20**