If your dryer is not heating, start by forgetting the one-size-fits-all checklist. The first thing worth ruling out on Bosch is condensation system heat exchanger fouling on ventless models — a fault the generic guides tend to skip entirely.
The short answer: Bosch Dryer not heating#
Short version: the top reason a Bosch dryer ends up not heating is condensation system heat exchanger fouling on ventless models, and you should budget within the $100–$350 range in the table below. Because Bosch routes this system its own way, the textbook cause matters less than the brand-specific one.
The failure modes below are specific to Bosch dryers — they are what set Bosch apart from the generic not heating checklist.
| Likely Bosch-specific cause | How often we see it | Typical repair |
|---|---|---|
| Condensation system heat exchanger fouling on ventless models | Most likely | $100–350 |
| Heating element failure on vented models | Common | $100–350 |
| NTC temperature sensor drift | Common | $100 |
| Condenser drain pump clog on ventless models | Possible | $100 |
| Lint filter housing seal deterioration | Possible | $100 |
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What you can safely check first#
Start with the checks a Bosch owner can safely run before booking a technician. Unplug your dryer first whenever you reach inside.
- Start by inspecting condensation system heat exchanger fouling on ventless models. Catching it here tells you whether this is a quick fix or a real repair.
- Check for heating element failure on vented models. Owners miss it because the generic guides never mention it.
- Rule out nTC temperature sensor drift. This is most likely the reason on these machines.
- Look first at condenser drain pump clog on ventless models. It is one of the Bosch faults I confirm before ordering a part.
- Read the panel. If your dryer is flashing E09, E18, E32 or E64, write the exact code down before you clear it — it narrows the fault fast and is the first thing a technician will ask for.
- Confirm the model. Parts and known quirks differ across the WTG86401UC and WTW87NH1UC line, so find the model number on the door or frame before ordering anything.
Repair cost and when to call an EasyBear technician#
The $100–$350 spread here is real: the low end covers a quick fix such as lint filter housing seal deterioration, while condensation system heat exchanger fouling on ventless models lands at the high end once you add the part and the labor to reach it. After the safe checks above, if the machine is still not heating, an EasyBear technician can confirm the cause in one visit instead of you buying parts you may not need.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
