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Appliance Error Codes

Bosch WQB245AXUC E02 Error Code | E02 Airflow Restriction

Error e02 on Bosch wqb245axuc: Airflow restriction — lint accumulated beyond filter in the exhaust path or cond. Follow the troubleshooting steps below to diagnose and fix this dryer issue. ## What Does E02 Mean on a Bosch WQB245AXUC? Your Bosch dryer is displaying an E02 error code, which indicates an airflow restriction more severe than a clogged lint filter (E01). E02 typically appears after E01 has been ignored or when lint has accumulated further into the system — in the condenser unit, the heat exchanger, or the internal ducting. On ventless heat pump dryers, all air circulates internally, so any restriction compounds over time. E02 indicates the system needs a deeper clean beyond just the lint filter. ## Fault Details | Field | Value | |-------|-------| | Error Code | E02 | | Appliance | Bosch WQB245AXUC 800 Series 24-inch Compact Ventless Heat Pump Dryer | | Fault Type | Airflow restriction | | Severity | Medium | | User Serviceable | Yes — follow steps below | | Applicable Models | WTW87NH1UC, WQB245AXUC, WQB245B0UC | ## Common Causes - Condenser fins clogged with lint that bypassed the filter over many cycles

  • Heat exchanger (evaporator/condenser coil) coated with fine lint reducing heat transfer and airflow
  • Internal duct or blower fan housing packed with compacted lint
  • Lint filter not cleaned regularly, allowing progressive build-up to reach deeper components
  • Overloading the dryer forcing more lint into the system per cycle
  • Repeatedly drying high-lint items (new towels, fleece blankets) without sufficient filter cleaning frequency ## Step-by-Step Troubleshooting | Step | Action | What To Do | Expected Result | |------|--------|------------|-----------------| | 1 | Clean the lint filter thoroughly | Always start with the lint filter — clean under warm water with a soft brush. Ensure all mesh pores are clear when held to light | Lint filter completely clean and mesh unobstructed | | 2 | Access and clean the condenser unit | On Bosch heat pump dryers, the condenser is accessed via a panel on the lower front of the machine. On models without self-cleaning condenser, remove the condenser carefully and rinse under warm water. Tap gently on the side to dislodge packed lint. Allow to dry completely before reinstalling | Condenser fins clean and open — water flows freely between fins | | 3 | Clean the condenser housing chamber | After removing the condenser, use a vacuum with a narrow attachment to clean the condenser housing and any accessible duct area. Lint accumulates in the corners of the housing chamber | Condenser chamber free of loose lint | | 4 | Run an empty cycle to test airflow | After reassembling all cleaned components, run a short timed drying cycle on low heat with an empty drum. E02 should clear if the airflow restriction has been resolved. The cycle should run quieter with improved airflow | Empty cycle completes without E02; normal operating sound restored | | 5 | Contact Bosch service if E02 persists | If E02 returns after thorough cleaning of the filter and condenser, lint may have reached the internal blower fan or heat pump evaporator coils. These require professional disassembly to clean. Contact Bosch at 1-800-944-2904 | Professional cleaning resolves persistent E02 | ## Frequently Asked Questions ### What is the difference between E01 and E02? E01 is a first-level lint filter cleaning alert — the filter needs cleaning. E02 is a second-level alert — the restriction has progressed beyond the filter into the condenser or internal ducting. E01 requires a quick filter cleaning; E02 requires a more thorough cleaning of the condenser and deeper components. ### How do I prevent E02? The key to preventing E02 is consistent lint filter cleaning after every single cycle. When the filter is always clean, almost no lint reaches the condenser. Additionally, avoid overloading the dryer (stay within the rated capacity) and run the Bosch drum care program monthly as a deeper maintenance step. ### Can I use compressed air to clean the Bosch dryer condenser? Bosch recommends rinsing the condenser with water rather than using compressed air. Compressed air can push lint deeper into the heat exchanger fins rather than removing it. Water rinsing flushes lint out naturally through the fins. Always allow the condenser to dry completely before reinstalling. ### How often should I deep-clean a Bosch heat pump dryer? Bosch recommends a deep clean of the condenser and internal components every 6 months for typical household use. For high-use households or frequent drying of high-lint fabrics, a quarterly deep clean prevents E02 from recurring. The Self-Cleaning Condenser feature on 500/800 Series models significantly reduces this maintenance requirement. --- Source: Bosch 800 Series 24-inch Compact Ventless Heat Pump Dryer service documentation. Last Updated: March 2026 ### Is it safe to keep using my Bosch wqb245axuc with error e02? If error e02 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 e02 on a Bosch wqb245axuc? Repair costs for error e02 on the Bosch wqb245axuc 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 e02 mean on a Bosch dryer? Error code e02 on Bosch dryer models indicates Airflow restriction — lint accumulated beyond filter in the exhaust path or condenser area. 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 wqb245axuc with error e02? If error e02 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 e02 on a Bosch wqb245axuc? Repair costs for error e02 on the Bosch wqb245axuc 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 e02 mean on a Bosch dryer? Error code e02 on Bosch dryer models indicates Airflow restriction — lint accumulated beyond filter in the exhaust path or condenser area. 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.