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Thermador·Dishwasherhigh severity
Thermador Dishwasher Error Code E02
Control board relay fault
Common Causes
- 1Relay contacts welded on the main board
- 2Power-surge component damage
- 3Cracked solder joint at a relay pin
Line-voltage relays sit close to the touch controls in the door. Verify the breaker is off with a meter before handling the board.
Step-by-Step Troubleshooting
- 1
Power the dishwasher down for a full ten minutes to force the board to re-initialize from cold
- 2
Open the outer door skin to expose the control module carried in the Thermador door and verify incoming line voltage is within ten percent of nominal
- 3
Examine every relay on the board under a light for lifted pins, hairline solder cracks, or heat discoloration around the coil
- 4
Measure each suspect relay coil for continuity — an open coil confirms the board rather than a downstream load
Pro Diagnostic Tip
Thermador routes the control board inside the door pack, so a leaking upper spray feed can drip onto the board and mimic E02. Check the door insulation for water tracks before assuming the relay is the root cause.
You Might Also Notice
- •Unit dead after a storm or outage
- •Random mid-program shutdowns
- •Display lights then blanks out
- •Buttons unresponsive on power-up
Parts, Cost & Difficulty
Repair Difficulty
Hard — Advanced Skills RequiredEstimated Repair Cost
$320–$600
Parts + labor. Free diagnosis with repair.
Parts That May Need Replacement
Main control board
Do You Have the Right Tools?
Bearing puller set ($120), drum spider wrench ($85), multimeter ($85), and diagnostic software. Our technician arrives with $3,000+ in professional tools — your diagnostic is free.
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High-voltage components and pressurized water lines create flood and shock risk. A single loose fitting can cause thousands in water damage. Our techs are licensed and insured — let them handle the risk.
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Get Professional Help Now
Error code E02 is a high-severity issue that can cause further damage to your dishwasher if left unresolved. A licensed technician can diagnose and fix it the same day.
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Frequently Asked Questions
What does Thermador error code E02 mean?
Thermador error code E02 indicates: Control board relay fault. This is a high-severity issue affecting your dishwasher.
How do I fix Thermador error code E02?
Power the dishwasher down for a full ten minutes to force the board to re-initialize from cold Then, Open the outer door skin to expose the control module carried in the Thermador door and verify incoming line voltage is within ten percent of nominal Then, Examine every relay on the board under a light for lifted pins, hairline solder cracks, or heat discoloration around the coil There are 1 more steps — see the full troubleshooting guide above. This repair typically requires professional tools and expertise.
How do I know if my dishwasher has error E02?
Besides the error code on the display, common signs include: Unit dead after a storm or outage; Random mid-program shutdowns; Display lights then blanks out. If you notice any of these symptoms, check your dishwasher's display panel for error code E02.
How much does it cost to fix Thermador E02?
Repair costs for Thermador E02 typically range from $320 to $600 depending on the specific cause and parts needed. EasyBear offers free diagnosis when you proceed with the repair. Call (415) 795-7300 for a same-day appointment.
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