VERIFIED
E:27 points toward compressor fault on the applicable Bosch dryer platform. Keep the model/E-Nr with the code for accurate diagnosis.
When a Bosch dryer displays E:27, the control has logged compressor fault. That directs attention toward the heating and temperature-control system, but the code still needs to be read together with the exact model and what the appliance was doing at the time.
Treat the warning as a way to narrow the system involved. Do not bypass interlocks, protection devices, electrical safeguards, or sealed systems simply to make the code disappear.
At a glance
- Code: E:27
- Appliance: Bosch Dryer
- Verified meaning: compressor fault
- Primary diagnostic direction: the heating and temperature-control system
- Service-area context: San Francisco; confirm coverage by ZIP code
What the warning means
The verified technical anchor for E:27 is compressor fault. That wording should remain intact in the imported factual layer. The code narrows the fault path toward the heating and temperature-control system, but it does not automatically identify a single failed component.
Symptoms worth recording
Before changing settings or cycling power, note the behavior you can see or hear:
- Cooling or heat-pump performance can drop.
- The compressor might fail to start or might stop unexpectedly.
- Operating sound can change.
- The control might protect the system and store the code.
Possible causes
The source record supports considering the following possibilities without treating any one of them as confirmed:
- Compressor mechanical or electrical failure.
- Inverter or drive electronics fault condition.
- Supply or wiring problem.
- A related temperature/pressure protection condition.
First steps that stay outside the appliance
- Write down the exact code and any change in cooling or drying performance.
- Confirm that external ventilation openings are clear.
- Avoid access refrigerant circuits or compressor terminals as a homeowner check.
These checks are for information gathering only. Do not expose live wiring, bypass a safety device, defeat a door interlock, open a sealed refrigeration circuit, or perform undocumented service-mode procedures.
When to stop using the appliance
Leave the appliance off for severe overheating, electrical odor, repeated trips, or abnormal mechanical noise.
When diagnosis becomes the next step
Compressor and inverter diagnosis requires model-specific electrical and refrigeration/heat-pump testing before parts are selected. If the warning is intermittent, note the program, temperature, load, or operating stage that makes it return. That pattern can narrow diagnosis considerably.
For a service request, include what the appliance was doing immediately before the warning and which safe checks were already completed.
Why the full Bosch model/E-Nr matters
The complete rating-label model matters. A code meaning documented on one Bosch dryer platform should not be assumed to apply to every generation without verification.
FAQ
For this record, E:27 is associated with compressor fault. The exact model/E-Nr still matters because Bosch can use different hardware and diagnostic logic across product families.
Only if no stop condition is present and the appliance is otherwise operating safely. If the code repeats, normal operation is affected, or there is leaking, smoke, electrical odor, sparking, overheating, or repeated breaker trips, leave the appliance off.
Use only a normal reset that Bosch documents for the exact model. If the warning returns, repeated resets are not a substitute for diagnosis.
No. The code identifies a detected system condition. Model information, symptoms, and model-specific testing are still needed before a component is selected.
Have the full Bosch model/E-Nr, the exact E:27 display, the cycle stage or operating state where it appears, the visible symptoms, and the external checks already completed.
Bosch service in the San Francisco area
Still seeing E:27 on your Bosch dryer?
If E:27 remains active or comes back, request Bosch dryer diagnosis for the San Francisco service area. Include the complete model/E-Nr, exact code, symptom summary, and ZIP code so service coverage can be confirmed.
Model compatibility: Bosch reuses codes across series and model years, so Bosch Dryer E:27 Error Code may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.