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Bosch Dryer Repair

We provide expert diagnostics and repair services for Bosch 300, 500, and 800 series compact, condensation, and heat pump dryers to get your laundry room back in working order.

Across the Pacific Northwest, from the damp climate of Seattle to the high-desert winters of Bend, Bosch dryers are typically 24-inch compact units tucked into tight laundry closets. Unlike standard American vented machines, the 300, 500, and 800 series utilize ventless condensation or heat pump technology. This engineering is highly efficient for apartments or homes lacking exterior venting, but it creates specific maintenance needs. Condensation models feature a dual-loop airflow system and a heat exchanger that must be kept clean. If you don't remove and wash this unit monthly, lint build-up will inevitably block the sump pump or heater assembly. For heat pump units in the 500 and 800 series, the sealed refrigerant system requires a tech familiar with HVAC principles to troubleshoot heating issues. At A-Fix Service, our team understands this European design. We know how to reach the NTC temperature sensors within the compact cabinets and how to test the moisture sensor strips by the lint filter housing, which often cause cycles to end prematurely. We are experts in the ActiveDry system and self-cleaning condenser models, ensuring we don't confuse a simple sensor error with a major failure.

Fixing a Bosch ventless dryer is not a job for the average DIYer. While a standard vented dryer allows for easy access to heating elements, Bosch machines feature a rigid, interlocking frame and complex wiring routed to a main control module at the top rear of the unit. Getting to the poly-V drive belt, rear drum bearing, or condensation pump often requires removing the top, sides, and sometimes the entire front console and door. Bosch relies heavily on Torx screws, and accessing diagnostic modes requires model-specific key-press sequences. A common error we see is homeowners attempting to replace a heating element in a heat pump model that doesn't even use a traditional resistive heater. We handle the complexity for you. Our service vehicles are stocked with Bosch OEM parts, such as NTC thermistors, door latches, drive belts, and condensation pumps. We charge a transparent $90 diagnostic fee, which is waived if you proceed with the repair, and we provide a 1-year parts and labor warranty for your peace of mind.

When you book a Bosch dryer repair with A-Fix Service, we focus on efficiency. Our technicians are experienced in unstacking units from tight closets, a common setup in homes from Tacoma to Bellingham. Once the machine is accessible, we enter the factory diagnostic mode to identify stored error codes from the main control board. We check the NTC temperature sensors, condensation pump assembly, drum support rollers, and drive belt tension. Because we service so many Bosch compact units, we carry essential parts like thermal fuses, water level float switches, and moisture sensor bars on our trucks. If a specialized component like a user interface module, main control board, or heat pump compressor relay is needed, our local supply chain usually secures it within 48 hours. We provide an upfront, flat-rate quote before beginning work, ensuring no hidden costs. Most jobs, such as clearing a sump or replacing a drive belt, are finished in under two hours. With over 20 certified technicians serving the region since 2007, we treat your Bosch appliance with precision.

Common Bosch Dryer Problems

Condensation pump failure or clogging
Premature cycle termination (moisture sensors)
Broken poly-V drive belt
NTC temperature sensor failure
Lint buildup in heat exchanger
Control board relay failure
Drum support roller wear
Water pooling in drum or floor
Thermal fuse tripped (no heat)
Door latch switch malfunction

Bosch Models We Service

WTG86400UCWTG86401UCWTW87NH1UCWTG86402UCWTB86200UCWTB86201UCWTG865H2UCWTW87NH2UC

Plus every other Bosch dryer model — service manuals on hand.

Common Bosch Error Codes

E01 / F01
Lint filter or exhaust air issue
Clean the lint filter and thoroughly wash the removable heat exchanger.
E03 / F03
Drainage issue or pump failure
Inspect the condensation hose for kinks and test the internal sump pump.
E06 / F06
NTC thermistor fault
Test the heating circuit NTC sensor for proper resistance and replace if out of spec.
E08 / F08
Heating element or heat pump fault
Verify continuity on the thermal fuse and test the heater assembly or compressor relay.
E11 / F11
Main control board communication error
Check the wiring harness connections between the user interface and main PCB.
E90 / F90
General electronic module fault
Perform a hard reset; if the code persists, the main control module requires replacement.

Frequently Asked Questions

Why does my Bosch ventless dryer take so long to dry?

Condensation and heat pump dryers typically run for 90 to 120 minutes. If your cycle exceeds 3 hours, you likely have a blocked condensation pump, a faulty NTC temperature sensor, or a clogged heat exchanger.

How much does it cost to repair a Bosch dryer?

We charge a $90 diagnostic fee, which is waived upon repair approval. Smaller jobs like replacing a moisture sensor or clearing a sump pump usually cost between $150 and $300, while complex repairs like control boards may exceed $400.

Are Bosch heat pump dryers harder to repair?

Yes. Models like the WTW87 series use a sealed refrigerant system rather than a standard heating element. Diagnosing 'no heat' issues here requires checking for refrigerant leaks, compressor relay faults, or airflow obstructions.

Do you carry parts for Bosch compact dryers on your trucks?

Yes, we stock common parts for 300, 500, and 800 series dryers, including condensation pumps, door latches, thermal fuses, and drive belts. If we need a control board, we can typically source it within 1-2 business days.

Why is water pooling under my Bosch dryer?

Ventless dryers pump moisture to a drain or reservoir. Pooling usually indicates a lint-clogged condensation pump, a failed float switch, or a kinked external drain hose.

Is it worth repairing my 10-year-old Bosch dryer?

Bosch dryers often last 12-15 years. If the repair cost is under $400, such as for a pump or belt, it is generally worth it. If the compressor or motor has failed, we will provide an honest assessment to help you decide if replacement is better.

Book Bosch Dryer

$90 diagnostic · 1-yr warranty · factory-trained on Bosch

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