Bosch WTMC1301US/03 dryer Parts

Error code E03 (03) on a Bosch dryer typically points to a condensation drain problem, most often a blocked, kinked, or restricted drain hose so water cannot pump out correctly. For your Bosch WTMC1301US, confirm the exact meaning and reset steps in the WTMC1301US owner's manual.

What to check first (fast fixes)

• Power the dryer off, wait 1 minute, then turn it back on.
• Inspect the condensation drain hose for kinks, pinches, or crushing behind the dryer.
• Check the hose end where it drains (sink, standpipe, or container) for blockage.
• Clean the lint filter and remove any film buildup; airflow issues can contribute to moisture problems.
• If your model uses a condensate container, empty it fully and reseat it firmly.
• Run a short timed cycle and watch for normal draining.

Cleaning and care that helps prevent E03

Keeping lint and moisture pathways clear reduces drain and drying faults.

• Clean the lint filter after every load.
• Periodically clean the exhaust duct and surrounding lint areas.
• Clean the moisture sensor if loads are coming out damp or cycles end early.

For step-by-step cleaning procedures, use the WTMC1301US owner's manual.

Quick symptom guide

What you notice	Most likely cause	What to do
E03 appears soon after start	Drain hose kinked or blocked	Straighten hose; clear restriction
Water not leaving container/drain	Drain path clogged	Clean hose and drain connection
Long dry times plus damp loads	Lint restriction or sensor contamination	Clean lint filter, duct, and moisture sensor

Why it matters

A restricted condensation drain can cause the dryer to stop or protect itself, and it can also lead to longer dry times and excess moisture inside the cabinet.

Last updated: February 2026

The Bosch WTMC1301US dryer capacity is 6.4 cu. ft. (181 L), and the manual lists a maximum load up to 17.6 lb (8 kg). These values describe the drum volume and the recommended load limit for best drying performance; see the owner's manual for the exact specification wording.

Capacity specs for Bosch WTMC1301US

• Drum volume: 6.4 cu. ft. (181 L)
• Max load (dry weight): up to 17.6 lb (8 kg)
• Best practice: load loosely so items tumble freely
• If overloaded: longer dry times, more wrinkles, uneven drying
• If underloaded on timed dry: items can overdry

Quick comparison: drum volume vs. load rating

Spec	What it means	WTMC1301US value	How to use it
Drum capacity	Physical space inside the drum	6.4 cu. ft. (181 L)	Helps judge bulky loads like towels and bedding
Load rating	Recommended maximum laundry weight	17.6 lb (8 kg)	Helps prevent poor drying and excess wear

Why it matters

Staying within the WTMC1301US capacity helps the moisture sensor and automatic cycles work correctly, reduces drying time, and helps protect rotating components such as drum supports and bearings.

Last updated: February 2026

On the Bosch WTMC1301US dryer, you reset an E01 error by stopping the cycle, setting the selector to OFF, and then restarting after you correct the most common causes (lint buildup, restricted exhaust, or a temporary control glitch). Use the reset and cleaning guidance in the owner's manual.

Reset steps (safe, no tools)

• Turn the program selector to OFF.
• Press Start/Stop to end the cycle (if it is running).
• Unplug the dryer (or switch the breaker off) for 1 minute.
• Restore power.
• Select a cycle and press Start/Stop.
• If the code returns, clean the lint filter and check the exhaust path before running another load.

Clean and airflow checks that commonly clear recurring errors

Even when the code is not strictly an airflow code, restricted airflow causes overheating and long dry times that can trigger faults.

• Remove lint from the lint filter after every load.
• Wash the lint filter with water if you see a film (fabric softener residue); let it dry completely before reinstalling.
• Inspect the exhaust duct behind the dryer for crushing or kinks.
• Confirm you are using metal ducting, not plastic or foil.
• Make sure the duct is 4-inch diameter and vents outdoors.

Check	What “good” looks like	What to do if not
Lint filter	Clear mesh, no residue	Clean, wash, dry fully
Exhaust duct	Straight, not crushed	Reroute or replace duct
Venting	Outdoors termination	Clear blockage, correct routing

Why it matters

A clean lint filter and clear exhaust keep temperatures stable and drying times normal; that prevents nuisance shutdowns and protects key components like the heater and sensors.

For code meanings and model-specific troubleshooting steps, use our Bosch dryer error codes guide alongside the owner's manual.

Last updated: February 2026