# How to Fix Frigidaire Error E31 (Pressure Sensor)
The E31 error code on your Frigidaire washing machine points directly to an issue with the system that detects the water level in the tub. While this error can occasionally be caused by a blockage, the likely culprit is a defective component: the **Pressure Switch** (or Pressure Sensor).
This guide will help you diagnose whether the issue is a simple blockage or requires parts replacement.
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## 1. Explanation: What Frigidaire Code E31 Means
The E31 error indicates a communication failure or an abnormal signal related to the water level.
In simple terms:
* **The Problem:** The main control board is not receiving the expected voltage or resistance reading from the component that measures the water level (the Pressure Switch).
* **The Result:** The washer cannot determine if the tub is empty, filled, or overfilled. This prevents the machine from advancing the cycle, often leading to a refusal to fill, or it may trigger the drain pump continuously.
* **Location of Component:** The Pressure Switch is typically located near the top control panel or main console of the washer, connected to the tub by a thin rubber or plastic air hose.
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## 2. Step-by-Step Fix: Diagnosing and Replacing the Pressure Switch
**⚠️ Safety First:** Always unplug your washing machine from the electrical outlet before accessing internal components or moving the appliance.
### Step 1: Perform a Hard Reset
Before checking internal components, try a basic reset to clear any temporary glitches:
1. Unplug the washer completely from the wall outlet.
2. Wait 5–10 minutes (this allows the residual power in the main control board to dissipate).
3. Plug the washer back in and attempt to run a short cycle.
If the E31 error reappears immediately, proceed to the physical inspection.
### Step 2: Check the Pressure Sensor Air Hose (Most Common Mechanical Cause)
The Pressure Switch works by trapping air in a small hose connected to the bottom of the tub. As the water fills, the rising pressure in the hose tells the switch the water level. If this hose is blocked or compromised, the switch will fail.
1. **Access the Switch:** Depending on your model, you may need to remove the top panel of the washer to locate the Pressure Switch. It is usually a small, round, or rectangular component with electrical wires and a thin rubber hose attached.
2. **Inspect the Hose:** Check the entire length of the air hose running from the switch down to the tub.
* **Kinks or Pinches:** Ensure the hose is not crimped by the drum or cabinet.
* **Detachment:** Verify the hose is securely fastened both to the Pressure Switch and the port on the tub.
* **Clogging:** Remove the hose from the switch and blow gently through it. You should hear bubbling in the bottom of the tub. If you meet resistance, the hose or the air dome port on the tub is clogged, usually with lint, mineral deposits, or detergent buildup.
3. **Clear Clogs:** If clogged, carefully clear the hose or the port on the tub (you may need a thin wire or small pipe brush, but be cautious not to puncture the tube).
### Step 3: Inspect Wiring and Electrical Connections
If the hose is clear and properly seated, the problem may be electrical:
1. **Check Harness:** Ensure the wiring harness plugged into the Pressure Switch is clean, dry, and securely connected. Corrosion or loose connections can cause intermittent signals.
2. **Inspect the Switch Plug:** Look for signs of burnt wires or melting on the plastic connector that plugs into the switch itself.
### Step 4: Replace the Pressure Switch (The Likely Fix)
If you have confirmed that the hose is clear and the wiring is secure, the Pressure Switch itself has failed and needs replacement. This is the most common resolution for the E31 code.
1. **Disconnect:** Unplug the wiring harness and the air hose from the old Pressure Switch.
2. **Remove:** The switch is usually secured by one or two screws, or it may simply clip into place. Remove the old unit.
3. **Install New Switch:** Install the new Pressure Switch, reconnect the air hose securely, and plug in the electrical harness.
4. **Test:** Reassemble the washer, plug it in, and run a diagnostic or standard wash cycle to confirm the E31 error is cleared.
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**Call to Action**
Check the price for a replacement Pressure Switch here: https://www.amazon.com/s?k=Frigidaire+Pressure+Switch&tag=trivian-20