Bosch Dryer Error Codes: What They Mean and How to Fix Them

Last updated: October 5, 2026 · Applies to Bosch vented compact dryers sold in the US such as 300/500/800 Series and older Axxis/Nexxt models (codes vary — verify in your manual) · Sources

Bosch dryer codes mostly point to two things: overheating from a blocked exhaust, and a temperature sensor or control fault. This guide covers 5 Bosch dryer codes and code groups.

Bosch dryer error code table

Always unplug the dryer or switch off its breakers before cleaning the lint housing or vent.

Don’t see your code? Search your E-Nr on Bosch’s US support site for the owner’s manual.

Troubleshooting without an error code

No code on the display, but something’s not right? Work through these safe checks for the most common dryer problems, in order. They apply to most Bosch dryers. Unplug the dryer before touching hoses, filters or panels.

Dryer won’t start

1. Close the door firmly — the dryer won’t run if the door switch doesn’t detect it closed.
2. Check the plug and the breaker. Electric dryers use a 240-volt circuit with a double breaker (or two fuses) — reset both sides if one has tripped.
3. Check whether Control/Child Lock is on (lock icon or a lock message on the display).
4. Press and hold Start for a second or two — many dryers need a longer press than a tap.

Dryer runs but doesn’t heat

1. Make sure you didn’t select an air-only, no-heat or Air Fluff setting.
2. Electric dryers: check both breakers or fuses for the dryer circuit — a dryer can tumble with one leg of power but won’t heat.
3. Gas dryers: confirm the gas shut-off valve behind the dryer is open and other gas appliances are working.
4. Clean the lint filter and check the vent (see “takes too long”) — a blocked vent can trip a safety thermostat or fuse that stops heating.
5. If it still won’t heat, the heating element, igniter, gas valve, thermal fuse or thermostat may need testing by a technician.

Dryer takes too long or clothes are still damp

1. Clean the lint filter before every load. If you use dryer sheets, wash the screen occasionally with warm soapy water and a soft brush to remove residue.
2. Pull the dryer out and check the duct behind it isn’t crushed, kinked or coiled.
3. Go outside and check the vent hood: the flap should open freely when the dryer runs and there should be strong airflow.
4. Don’t overload the dryer, and make sure the washer spun the load properly (very wet loads take much longer).
5. On sensor-dry models, wipe the metal moisture-sensor bars inside the drum with a soft cloth; residue can make the dryer end cycles early or late.
6. Have the full vent run professionally cleaned if it has been more than a year or the run is long.

Dryer runs but the drum won’t turn

1. Unplug the dryer, then try turning the drum by hand. If it spins very freely with no resistance, the drive belt may be broken.
2. Check for an item jammed between the drum and the front of the dryer.
3. If you hear the motor hum but the drum doesn’t move, stop using the dryer — the belt, idler pulley or motor need a technician.

Dryer is squeaking, thumping or noisy

1. Check pockets and the drum for coins, buttons, zippers and other hard objects.
2. Level the dryer so it doesn’t rock.
3. Squealing or squeaking that grows over time usually points to worn drum rollers, an idler pulley or drum glides; thumping can be a flat spot on a roller. These are repair jobs for a technician or an experienced DIYer.
4. A burning smell, smoke or sparks: switch off at the breaker and don’t use the dryer until it has been inspected.

Common mistakes

Many “faults” are caused by how the dryer is loaded, installed or maintained. Avoid these and you’ll see far fewer codes:

• Skipping the lint filter. Clean it before every load. A clogged filter slows drying, raises temperatures and can trigger vent or overheat codes.
• Neglecting the vent. Crushed foil ducts, long runs and lint-clogged outside hoods are the top causes of long drying times and overheating. Use rigid or semi-rigid metal duct and clean the run regularly.
• Overloading. Clothes need space to tumble. Overfilled drums dry unevenly and take longer.
• Drying very wet loads. If the washer didn’t spin properly, fix that first — the dryer isn’t designed to remove standing water.
• Ignoring residue on the lint screen and sensors. Dryer-sheet film can block airflow through the screen and fool moisture sensors. Wash the screen and wipe the sensor bars occasionally.
• Using an extension cord or wrong outlet. Dryers should be plugged directly into a correctly rated outlet; low or incorrect voltage causes heating and power codes.

Tips and tricks for Bosch owners

Useful Bosch-specific features and procedures, confirmed from Bosch’s own support pages and manuals. Exact buttons vary by model, so check your manual.

• Find the E-Nr first. Bosch identifies models by the E-Nr on the rating label inside the door — you’ll need it for manuals and service.
• Overheating codes are vent codes first. E:01, E:11 and E:12 usually clear once the lint filter and exhaust are cleaned.

Safety note

When to call a pro

The steps above are limited to safe, user-level checks. Call Bosch service (1-800-944-2904) or a qualified appliance technician if:

• Overheating codes return after the vent is cleaned.
• Sensor (E:17, E:18) or control (E:20–E:26) codes return after a power reset.
• The drum won’t turn, or you hear grinding or squealing.
• You notice burning, smoke or sparks.

Frequently asked questions

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