Bosch Dryer E63 Error Code: Heating Element Failure or Power Unit Fault

What the code means

Bosch's US dryer error code guide says E63 indicates a heating element failure. Its advice is to unplug the dryer, inspect the heating element for visible damage or burns, make sure the heating element connections are secure, and contact an authorized technician if nothing obvious turns up. Bosch France's dedicated E63 page describes it differently: the motor may be disconnected from the power unit, or the power module may be defective, and it recommends calling Bosch's technicians. The technician reference MyPros+, quoting the Bosch WTG865H2UC service manual error list, matches the French wording: E:63 is the power unit's collective number for system errors, and on models with Basic Software 240 it may appear instead of E:90, with the first check being the electrical connections between the motor and the power unit. In plain terms, E63 means the dryer's power electronics have flagged a problem with a load they drive (the heater or the motor), so the dryer stops. Which one is more likely depends on your model, which is why the technician should confirm it from the E-Nr. E63 is different from E06, which points to the heating circuit overheating, and from E90, the general electronic fault (see our Bosch E06 and E90 pages).

Likely causes

• A failed heating element or loose heating element connections, which is how Bosch's US error code guide describes E63
• The motor disconnected from the power unit, or a defective power module, which is the wording on Bosch France's E63 page
• A power unit system error, which the Bosch WTG865H2UC service error list (via MyPros+) says E:63 collects and may show instead of E:90 on some software versions
• A temporary electronics glitch after a power interruption, which a 5-minute power reset can sometimes clear (Bosch US guide)

Safe DIY checks

1. Turn the dryer off and note the exact code and your model number (E-Nr) from the rating label inside the door.
2. Power reset: unplug the dryer or switch off its circuit breaker for at least 5 minutes, then restore power. Bosch says a power cycle can often clear error codes and reset the electronics.
3. Run a short program with a small load. If it finishes normally, watch the next few loads.
4. If E63 returns, keep the dryer unplugged. Bosch's US guide suggests checking the heating element for visible damage or burns and making sure its connections are secure, but the heater, motor and power unit sit inside the cabinet. If you aren't comfortable working on an unplugged appliance's internal wiring, leave this step to a technician.
5. Don't run the dryer repeatedly with E63 showing, and never bypass any thermal protection or reconnect wiring you're unsure about.

Parts that commonly fix it

Always match the part number to your exact model.

Related codes

• DR Bosch Dryer DR
• E01 Bosch Dryer E01
• E03 Bosch Dryer E03
• E06 Bosch Dryer E06
• E08 Bosch Dryer E08

All Bosch codes →

Sources

1. Bosch US: Dryer Error Codes guide (E63: heating element failure; unplug, inspect the element for damage or burns, check connections, then authorized technician; 1-800-944-2904; power cycle reset for at least 5 minutes)
2. Bosch France: Erreur sèche-linge E63 (motor may be disconnected from the power unit, or the power module may be defective; contact Bosch technicians)
3. MyPros+: Bosch Dryer Error Code E:63, quoting the Bosch WTG865H2UC service manual error list p. 5 (power unit collective number for system errors, may appear instead of E:90 with Basic Software 240; first check motor-to-power-unit connections)