Thermador Dishwasher Error Codes

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📋 Error Code Index — Thermador Dishwasher

E01Water Inlet Fault E02Drain Fault E03Heating Fault E04Water Overflow E05Door Latch Fault E06Communication Fault

E01

Water Inlet Fault

Appliance not filling to required level within allowed time.

Medium Priority

Possible Causes
Water supply valve closed or restricted
Inlet valve solenoid failed
Low water pressure below 20 psi
Inlet screen clogged
Diagnostic Steps
1Verify supply valve fully open
2Check household water pressure
3Clean inlet valve screen
4Test inlet valve solenoid and replace if failed

E02

Drain Fault

Appliance not draining within allowed time.

Low Priority

Possible Causes
Drain pump filter blocked with food debris
Drain hose kinked
Drain pump motor failed
Diagnostic Steps
1Remove and clean drain pump filter
2Check drain hose for kinks
3Test drain pump motor and replace if failed

E03

Heating Fault

Water not reaching required temperature within allowed time.

Medium Priority

Possible Causes
Heating element failed open circuit
NTC sensor faulty
Relay not energizing heater
Diagnostic Steps
1Test heating element — OL confirms open circuit
2Test NTC sensor resistance
3Replace heating element or NTC as indicated

E04

Water Overflow

Float switch triggered — water level exceeded maximum limit.

Urgent

Possible Causes
Inlet valve stuck open
Float switch stuck in down position
Control board relay welded closed
Diagnostic Steps
1Disconnect power and water immediately
2Test inlet valve — replace if passing water when off
3Test float switch continuity

E05

Door Latch Fault

Door not confirmed closed — cycle cannot start.

Medium Priority

Possible Causes
Door not fully closed
Door latch microswitch failed
Latch hook damaged
Diagnostic Steps
1Push door firmly closed
2Inspect latch hook and strike for damage
3Test door microswitch and replace if failed

E06

Communication Fault

Communication error between main board and control panel.

High Priority

Possible Causes
Wiring harness loose between boards
Control panel failed
Main control board failed
Diagnostic Steps
1Check wiring harness connections
2Power cycle unit 60 seconds
3Replace control panel or main board as indicated

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Important Notice: Error code information on this page is based on Thermador manufacturer service documentation. Always disconnect power and water supply before inspecting. Fault behavior may vary by model year. AppliancesCare Appliance Repair LLC provides this information for educational purposes only.