Bosch dryer not heating is a known issue affecting 300 series (WTG86401UC). Our technicians specialize in Bosch-specific diagnostics and repair.
Bosch dryer not heating is typically caused by burned out heating element or blown thermal fuse. Bosch-specific factor: condensation system heat exchanger fouling on ventless models — lint and mineral deposits reduce drying efficiency. Repair costs $100-$350 with free diagnostic and 90-day warranty.
Condensation system heat exchanger fouling on ventless models — lint and mineral deposits reduce drying efficiency
Heating element failure on vented models — element burns out at terminal connection from thermal cycling
NTC temperature sensor drift — dryer shuts heat off prematurely because sensor reads high
Condenser drain pump clog on ventless models — condensate water backs up and triggers safety shutoff
Lint filter housing seal deterioration — lint bypasses filter and accumulates in heat exchanger
Other Bosch models may also be affected. Book a free diagnostic for confirmation.
Seeing one of these codes? It likely indicates not heating.
Bosch ventless condensation dryers are popular in Bay Area apartments and condos where exterior venting is not feasible — the compact 24-inch design fits in closets without vent access. The heat exchanger requires monthly cleaning but many Bay Area owners are not aware of this maintenance step. Fog-belt humidity reduces the condensation dryer efficiency because the ambient air already carries moisture, lengthening dry times before triggering service calls.
For ventless models: remove heat exchanger access panel at bottom front, slide out exchanger, inspect for lint and mineral buildup — rinse under running water
For vented models: test thermal fuse and heating element with continuity checks — same procedure as standard dryers
Test NTC temperature sensor: disconnect at control board, measure resistance — should read approximately 10 kohm at room temperature
Check condensate drain: remove drain pan or access pump — clear any mineral deposits and verify pump operation
The technician cleans the heat exchanger on ventless models as a first step — this resolves about 50% of Bosch condensation dryer heating complaints. The exchanger slides out from the bottom front panel and is rinsed under water. If the condensate pump is clogged, it is accessed from the base of the unit and cleared. Vented model repairs follow standard element and thermal fuse replacement procedures — 45-60 minutes. The technician demonstrates the heat exchanger cleaning process to the homeowner to prevent recurrence.
| Diagnostic | Free |
| Typical repair | $100–$350 |
| Repair time | 1-2 hours |
| Warranty | 90 days parts + labor |
Bosch Expert
Brand-specific diagnostic tools and training
Same-Day Fix
Available in Bay Area
90-Day Warranty
Guaranteed parts and labor
Free diagnostic for not heating issues. Same-day service in Bay Area.
Book Free DiagnosticVerified reviews from homeowners across San Francisco and Bay Area
“My exprience with Easy Bear was absolutely superior from the beginning. I had a Subzero decide to quit. Daniel assessed the issue immediately, ordered the required new " motherboard" and had it installed within three days. My prior replacement of said part took 5 months during Covid. Daniel is smart, professional, clearly knows his trade . I most definitely will use Easy Bear in the future.”
Sally S.
Refrigerator Repair
San Francisco, CA
“Daniel was thorough in his assessment and very responsive through phone and text. He looked over a dishwasher for possible repair and in less than one hour, had recommendations and ballpark estimate. Will definitely contact again in the future.”
Mark J.
Dishwasher Repair
San Francisco, CA
“Daniel the technician came to diagnose what's causing our washing machine water overflowing. He didn't actually have to do anything to solve the issue, because as soon as he turned it back on, it began to work properly, but explained what the probable cause was. He was sincere and clear on the matter related to the situation. I wasn't charged for his visit as I was told ahead of time. Stanislav was also cordial arranging for all of the process. I will call them next time I need an appliance service without hesitation.”
Horace L.
Washing Machine Repair
Mill Valley, CA
“I’m very happy with the service! They arrived quickly and fixed everything efficiently. The issue was with the water heater in the dishwasher, and they diagnosed and repaired it right away. Everything is working perfectly now. Highly recommend!”
Любовь Кубышкина
“Daniel is a good handyman, showed up on time and did the job.Communication was easy and everything was clear.Would use again.”
Maksim Sidorov
“I was very impressed with the professional service. They arrived the very next day after I called. They quickly identified the problem with the refrigerator and didn't waste any time. They even shared a few helpful tips to help me avoid future issues with the fridge. Highly recommended.”
Oleg
“Great team, excellent work- highly recommended.”
Mila River
“Great service — the technician quickly fixed my washing machine without any hassle”
Aleksandra Babueva
“My washing machine Works perfectly thanks for help”
Дари
“⭐️⭐️⭐️⭐️⭐️ I had an excellent experience with EasyBear Appliance Repair. The repair was done quickly and everything is working perfectly now. Clear communication, fair pricing, and great customer service.”
Arina Bazarova
“My review: They arrived on time, inspected thoroughly, and fixed the problem. I highly recommend them.”
Bair Sanzhimitypov
“Had an issue with my refrigerator not cooling. Booking was easy, tech showed up on time and knew what he was doing. Only minor thing — had to wait a couple days for the appointment, but the actual repair was quick and the price was reasonable. Would recommend.”
Алекс Тронов