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Appliance Error Codes

Bosch WQB245B0UC E04 Error Code | E04 Drum Overloaded

Error e04 on Bosch wqb245b0uc: Drum overloaded — load is too large for the dryer to safely tumble and dry. Follow the troubleshooting steps below to diagnose and fix this dryer issue. ## What Does E04 Mean on a Bosch WQB245B0UC? Your Bosch dryer is displaying an E04 error code, which means the drum is overloaded. Bosch dryers detect when the load is too heavy or too large for the drum to tumble items freely. When items cannot tumble, they clump together, moisture cannot escape from the center of the bundle, and drying is inefficient. The dryer control board detects the overload condition through motor load monitoring and triggers E04 to prompt you to reduce the load size. ## Fault Details | Field | Value | |-------|-------| | Error Code | E04 | | Appliance | Bosch WQB245B0UC 500 Series 24-inch Compact Ventless Heat Pump Dryer with Self-Cleaning Condenser | | Fault Type | Drum overloaded | | Severity | Low | | User Serviceable | Yes — follow steps below | | Applicable Models | WTW87NH1UC, WQB245AXUC, WQB245B0UC | ## Common Causes - Too many items loaded at once — exceeding the rated drum capacity

  • Single very heavy item (wet comforter, large rug) too bulky for the drum to rotate
  • Wet items that weigh significantly more than their dry weight — a full cotton load can be 2–3x heavier when wet
  • Items tangled into a ball preventing proper tumbling
  • Load packed so tightly that the drum motor cannot overcome the starting torque ## Step-by-Step Troubleshooting | Step | Action | What To Do | Expected Result | |------|--------|------------|-----------------| | 1 | Remove approximately half the load | Open the dryer and remove items until the drum is no more than 2/3 full. Leave at least a hand’s width (about 15 cm / 6 inches) of space above the laundry when the drum is at rest | Sufficient space above laundry for free tumbling | | 2 | Untangle any items | Separate any items that have twisted together during the wash cycle. Sheets, duvets, and jeans commonly wrap around each other. Untwist and loosely load them back into the drum | All items loose and separate in drum | | 3 | Restart the cycle and listen for tumbling | Close the door and start the cycle. You should hear the items tumbling freely inside the drum. If the drum is silent or straining, remove more items | Items tumbling audibly; motor running smoothly | | 4 | Dry the removed items in a separate load | Dry the removed items as a second load. Two smaller loads dry faster and more completely than one overloaded load, saving overall time and energy | Both loads dry successfully without E04 | | 5 | Check Bosch capacity guidelines for fabric types | Bosch 24-inch compact dryers hold approximately 13 lbs (6 kg) for cotton. Synthetics: 5 lbs (2.5 kg). Delicates: 4.5 lbs (2 kg). These weights are for dry items — wet items weigh significantly more and take more drum space | Future loads sized within rated capacity; E04 does not recur | ## Frequently Asked Questions ### How full should a Bosch dryer drum be? Bosch recommends filling the dryer drum to no more than 2/3 capacity. Items must have room to tumble freely — this is essential for heat and airflow to reach all surfaces. Overfilling reduces drying efficiency, increases wear on the motor, and causes E04. ### Can overloading damage a Bosch heat pump dryer? Repeated overloading strains the drum motor and bearings, shortening their lifespan. The heat pump compressor also works harder when airflow is restricted by a packed load. While E04 protects against immediate damage by stopping the cycle, chronic overloading accelerates mechanical wear over time. ### Why does a wet duvet cause E04? Duvets and comforters absorb enormous amounts of water. A king-size duvet can easily weigh 12+ lbs when wet. This may exceed the compact dryer’s rated capacity. Large duvets are best dried at a laundromat with commercial capacity dryers, or allowed to partially air-dry before loading into the compact dryer. ### Does E04 damage clothes? No. E04 stops the cycle before any overheating or damage can occur. Items remain slightly damp but undamaged. Restart with a smaller load. --- Source: Bosch 500 Series 24-inch Compact Ventless Heat Pump Dryer with Self-Cleaning Condenser service documentation. Last Updated: March 2026 ### Is it safe to keep using my Bosch wqb245b0uc with error e04? If error e04 does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the dryer with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error e04 on a Bosch wqb245b0uc? Repair costs for error e04 on the Bosch wqb245b0uc dryer depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a Bosch-authorized service provider for an accurate estimate based on your specific situation. ### What does error code e04 mean on a Bosch dryer? Error code e04 on Bosch dryer models indicates Drum overloaded — load is too large for the dryer to safely tumble and dry. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue. ### Is it safe to keep using my Bosch wqb245b0uc with error e04? If error e04 does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the dryer with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error e04 on a Bosch wqb245b0uc? Repair costs for error e04 on the Bosch wqb245b0uc dryer depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a Bosch-authorized service provider for an accurate estimate based on your specific situation. ### What does error code e04 mean on a Bosch dryer? Error code e04 on Bosch dryer models indicates Drum overloaded — load is too large for the dryer to safely tumble and dry. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue.