# How to Fix Bosch Error E05 (Motor Fault)
The Bosch Error Code E05 indicates a serious problem related to the motor functionality. While this error can sometimes point to a main board issue or a faulty tacho sensor, the overwhelming majority of E05 faults on older or well-used machines are caused by worn-out **Motor Carbon Brushes**.
## Explanation: What E05 Means
The E05 error occurs when the main control module (PCB) sends a signal to the motor but does not receive the necessary rotational feedback. Essentially, the machine thinks the drum should be spinning, but the motor is unable to start or maintain rotation.
* **Symptom:** The machine stops mid-cycle, the drum won’t turn, or the machine makes a clicking noise before stopping.
* **The Culprit:** Carbon brushes are consumable components that transfer electrical current to the spinning part of the motor (the commutator). Over time, these brushes wear down until they are too short to make contact, preventing the motor from operating.
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## Step-by-Step Fix: Replacing Motor Carbon Brushes
This guide assumes a DIY skill level comfortable with basic tools and working with appliance internals. Always prioritize safety.
### ⚠️ Safety First
1. **Disconnect Power:** Unplug the machine completely from the wall socket.
2. **Drain Water:** Ensure the machine is empty of water, either through the drain cycle or manually using the filter hose.
### Phase 1: Accessing the Motor
Most Bosch models require access from the rear or the bottom of the machine.
1. **Remove the Back Panel:** Use a screwdriver or hex driver to remove the screws securing the large metal panel at the back of the washer. Set the panel aside.
2. **Locate the Motor:** The motor is typically situated at the bottom, directly beneath the drum pulley. It may be partially obscured by belts or mounts.
3. **Optional – Tilt the Machine:** For easier access, carefully tilt the machine forward and lean it against a stable wall. Place padding (towels, cardboard) underneath to prevent scratching the floor.
4. **Disconnect the Wiring:** Before removing the motor, carefully disconnect the wiring harness leading to it. Note the orientation of the connectors (taking a photo is highly recommended).
5. **Remove the Motor:** The motor is usually held in place by two or three bolts. Remove these bolts and carefully slide the motor out of its mounting bracket.
### Phase 2: Diagnosing and Replacing the Brushes
1. **Locate the Brush Housings:** The carbon brushes are small, rectangular blocks held in plastic or metal casings, clipped or screwed onto the motor housing near where the wiring attaches. There will be two brushes, one on each side.
2. **Remove the Old Brushes:**
* Unclip or unscrew the brush housing covers.
* The brushes are often held in place by a small spring clip or simply slide out. Gently pull the brush block out of its housing.
3. **Check for Wear:** A new Bosch carbon brush is typically 3 to 4 cm long. If your old brush has less than **1 cm** of carbon remaining, it is the confirmed cause of the E05 error and must be replaced.
4. **Install New Brushes:**
* Ensure the new brushes are the correct type for your specific motor model (they should fit snugly but slide freely).
* Insert the new brushes into the housing, ensuring the carbon tip is correctly oriented to meet the commutator (the metal strips on the rotor).
* Secure the housing covers or clips back into place.
### Phase 3: Reassembly and Test
1. **Reinstall the Motor:** Slide the motor back into its mounting bracket and securely tighten the bolts.
2. **Reconnect Wiring:** Plug the wiring harness back into the motor (refer to your earlier photo to ensure proper connection).
3. **Secure Panels:** Reinstall the back panel and secure all screws. Return the machine to its upright position.
4. **First Test:** Plug the machine back in. Run a quick, low-spin cycle (or diagnostics test if your machine supports it). The E05 error should be cleared, and the drum should now spin normally.
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Check the price for a replacement Motor Carbon Brushes here: https://www.amazon.com/s?k=Bosch+Motor Carbon Brushes&tag=trivian-20