# How to Fix Bosch Error E26 (Pressure Sensor)
Bosch Error Code E26 indicates a failure within the machine’s water level detection system. This issue prevents the washing machine from accurately determining the amount of water currently inside the drum, halting the wash cycle.
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## 1. Explanation: What Does Bosch E26 Mean?
Error Code E26 signifies a problem with the **Pressure Sensor** or **Pressure Switch** circuit.
The control board is receiving an illogical or corrupted signal regarding the water level. This system relies on air pressure: as water fills the tub, it compresses air inside a small hose leading to the pressure switch. The switch translates this pressure into a signal the control board can read.
**The most likely culprits are:**
1. A faulty **Pressure Switch** (the electronic component).
2. A blockage or kink in the **Pressure Hose** or **Air Trap** leading to the switch.
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## 2. Step-by-Step Fix: Diagnosing and Fixing E26
**Safety First:** Always unplug the washing machine from the wall outlet before opening panels or inspecting internal components.
### Step 1: Perform a Hard Reset
Before checking components, rule out a temporary glitch in the control board.
1. Unplug the washing machine completely.
2. Wait 5–10 minutes to allow any residual charge to dissipate.
3. Plug the machine back in and attempt to start a new cycle.
If the error immediately returns, proceed to the physical inspection.
### Step 2: Inspect the Drain and Filter
While the pressure system is separate from the drain pump, severe blockages can sometimes impede water flow enough to confuse the sensors.
1. Locate the pump filter access door (usually at the bottom front corner).
2. Open the door and drain any excess water using the small drain tube provided.
3. Unscrew and remove the pump filter.
4. Clear any lint, coins, or debris caught in the filter housing.
5. Reinstall the filter securely.
### Step 3: Locate and Clear the Pressure System Hose
This is the most common cause of E26 errors that are **not** caused by a failed electrical component. Blockages in this hose prevent the switch from accurately reading water levels.
1. **Access the Components:** You will likely need to remove the top panel of the washing machine (usually two screws at the back) to access the internal components.
2. **Locate the Switch:** The Pressure Switch is typically a small, round plastic device located near the top of the machine or behind the control panel. It will have wires connected to it.
3. **Locate the Hose:** A thin, rubber or clear plastic hose will be connected to the bottom of the pressure switch. Trace this hose down into the drum assembly.
4. **Inspect for Kinks:** Check the entire length of the hose for kinks, pinches, or signs of wear.
5. **Check the Air Trap/Sump:** Ensure the hose is securely attached to the air trap (a small chamber or fitting near the bottom of the drum). This air trap can accumulate residue and detergent sludge.
6. **Clear the Hose:** Disconnect the hose from **both** the pressure switch and the air trap (if possible). Gently blow through the hose to ensure air can pass freely. If you feel resistance, clean the hose and the air trap fitting with warm water to remove detergent build-up.
### Step 4: Test or Replace the Pressure Switch
If the power reset, draining, and clearing the hose did not resolve the E26 error, the electronic Pressure Switch itself has likely failed and needs replacement.
The Pressure Switch is usually a sealed unit that cannot be repaired, only replaced.
1. **Verify the Connection:** Ensure the wiring harness attached to the switch is secure and free of corrosion or burnt connections.
2. **Replacement:** Disconnect the wiring harness and the pressure hose from the faulty switch. Note the orientation of the old switch, and install the new switch into the same position.
3. **Test:** Reassemble the machine’s top panel, plug the unit back in, and run a test cycle.
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## 3. Call to Action
Check the price for a replacement Pressure Switch here: https://www.amazon.com/s?k=Bosch+Pressure Switch&tag=trivian-20