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Thermador · DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity

Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity ED Error Fix: Cycle Timer Malfunction

The cycle timer does not advance properly, causing the dishwasher to freeze on a cycle or fail to complete the wash process.

Medium severity2 fixes available✨ Free fix available

Quick Answer

Error ED on the Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity means: Cycle Timer Malfunction. The top-ranked community fix is “Replace Cycle Timer Assembly” (medium difficulty, ~40 min, DIY cost: $50-$70). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · dishwasher

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

Root Cause Analysis

Electrical FaultPrimary

When to Call a Professional

While many dishwasher repairs can be done safely at home, consider hiring a qualified technician if:

The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $140-$200.

Other Thermador Models with Error ED

T30IR905SP 30 in Column Refrigerator with 15.5 cu ft Capacity, WiFi, and ThermaFresh System

refrigerator · 2 fixes

Other Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity Error Codes

Water Inlet Valve Error

2 fixes

Drain Pump Failure

2 fixes

Door Lock Failure

2 fixes

Heater Element Failure

2 fixes

Water Temperature Sensor Fault

2 fixes

Control Board Communication Error

2 fixes

Overflow Water Detected

2 fixes

Water Level Sensor Malfunction

2 fixes

People Also Ask About Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity Error ED

What does error code ED mean on a Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity?

Error code ED on the Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity means: Cycle Timer Malfunction. The cycle timer does not advance properly, causing the dishwasher to freeze on a cycle or fail to complete the wash process.

How do I fix error code ED on my Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity?

The most successful fix is "Replace Cycle Timer Assembly" (medium difficulty, ~40 minutes). Estimated DIY cost: $50-$70. HomeMD has 2 community-ranked fixes for this error.

Is error code ED on a Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity serious?

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Can I fix Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity error ED myself?

Yes — the top-ranked community fix ("Replace Cycle Timer Assembly") is rated medium difficulty and takes about 40 minutes. Tools needed: Phillips screwdriver, Needle nose pliers.

How much does it cost to repair Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity error ED?

DIY cost: $50-$70. Professional repair typically costs $140-$200. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity have?

The Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity has 8 other known error codes, including: E1 (Water Inlet Valve Error), E2 (Drain Pump Failure), E3 (Door Lock Failure), E4 (Heater Element Failure), E5 (Water Temperature Sensor Fault), and 3 more.

Which other Thermador models have the ED error?

Error code ED also appears on 1 other Thermador model: T30IR905SP 30 in Column Refrigerator with 15.5 cu ft Capacity, WiFi, and ThermaFresh System. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity have?

The Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity has 8 other known error codes:

E1 — Water Inlet Valve Error (2 fixes)
E2 — Drain Pump Failure (2 fixes)
E3 — Door Lock Failure (2 fixes)
E4 — Heater Element Failure (2 fixes)
E5 — Water Temperature Sensor Fault (2 fixes)
E6 — Control Board Communication Error (2 fixes)
E7 — Overflow Water Detected (2 fixes)
E8 — Water Level Sensor Malfunction (2 fixes)

Which other Thermador models have the ED error?

Error code ED also appears on 1 other Thermador model:

T30IR905SP 30 in Column Refrigerator with 15.5 cu ft Capacity, WiFi, and ThermaFresh System (refrigerator) · 2 fixes

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