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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 EF Error Fix: Rinse Aid Dispenser Error

The rinse aid dispenser has malfunctioned or is empty, resulting in poor drying and spotting on dishes.

Low severity2 fixes available

Quick Answer

Error EF on the Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity means: Rinse Aid Dispenser Error. The top-ranked community fix is “Refill Rinse Aid and Reset Indicator” (easy difficulty, ~5 min, DIY cost: $5-$10). 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

Mechanical WearPrimary

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: $40-$60.

Other Thermador Models with Error EF

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 EF

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

Error code EF on the Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity means: Rinse Aid Dispenser Error. The rinse aid dispenser has malfunctioned or is empty, resulting in poor drying and spotting on dishes.

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

The most successful fix is "Refill Rinse Aid and Reset Indicator" (easy difficulty, ~5 minutes). Estimated DIY cost: $5-$10. HomeMD has 2 community-ranked fixes for this error.

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

This error is rated low severity. It is generally not urgent and can often be resolved with a simple DIY fix.

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

Yes — the top-ranked community fix ("Refill Rinse Aid and Reset Indicator") is rated easy difficulty and takes about 5 minutes. Tools needed: .

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

DIY cost: $5-$10. Professional repair typically costs $40-$60. 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 EF error?

Error code EF 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 EF error?

Error code EF 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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