❄️Refrigerator

E20

Thermador · T18IF905SP 18 in Column Freezer with 5.1 cu ft Capacity and LED Lighting

Thermador T18IF905SP 18 in Column Freezer with 5.1 cu ft Capacity and LED Lighting E20 Error Fix: Ice Maker Mold Heater Fault

The ice maker mold heater is not functioning, causing ice cubes to freeze to the mold and not eject properly. This interrupts ice production and may lead to ice jams.

Medium severity2 fixes available

Quick Answer

Error E20 on the Thermador T18IF905SP 18 in Column Freezer with 5.1 cu ft Capacity and LED Lighting means: Ice Maker Mold Heater Fault. The top-ranked community fix is “Replace Ice Maker Mold Heater Assembly” (medium difficulty, ~50 min, DIY cost: $35-$55). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · refrigerator

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

Heating Element FailurePrimary

Mechanical Wear

When to Call a Professional

While many refrigerator 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 E20

DWHD770WFP 24 in 39 dBA Emerald Series Dishwasher with Steam Cleaning and WiFi

dishwasher · 2 fixes

ME302WS Masterpiece Wall Oven

oven · 2 fixes

T36BB925SS 36 in 20.9 cu ft Freedom® Collection Built-In French Door Refrigerator with ThermaFresh System

refrigerator · 2 fixes

Other Thermador T18IF905SP 18 in Column Freezer with 5.1 cu ft Capacity and LED Lighting Error Codes

Evaporator Sensor Failure

2 fixes

E10

Ice Maker Water Valve Fault

2 fixes

E11

Freezer Door Gasket Leak

Drain Pump Failure

Main Temperature Sensor Short Circuit

2 fixes

E14

High Limit Thermostat Open

2 fixes

E15

Door Heater Circuit Fault

2 fixes

E16

Ice Maker Fill Tube Frozen

2 fixes

People Also Ask About Thermador T18IF905SP 18 in Column Freezer with 5.1 cu ft Capacity and LED Lighting Error E20

What does error code E20 mean on a Thermador T18IF905SP 18 in Column Freezer with 5.1 cu ft Capacity and LED Lighting?

Error code E20 on the Thermador T18IF905SP 18 in Column Freezer with 5.1 cu ft Capacity and LED Lighting means: Ice Maker Mold Heater Fault. The ice maker mold heater is not functioning, causing ice cubes to freeze to the mold and not eject properly. This interrupts ice production and may lead to ice jams.

How do I fix error code E20 on my Thermador T18IF905SP 18 in Column Freezer with 5.1 cu ft Capacity and LED Lighting?

The most successful fix is "Replace Ice Maker Mold Heater Assembly" (medium difficulty, ~50 minutes). Estimated DIY cost: $35-$55. HomeMD has 2 community-ranked fixes for this error.

Is error code E20 on a Thermador T18IF905SP 18 in Column Freezer with 5.1 cu ft Capacity and LED Lighting 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 T18IF905SP 18 in Column Freezer with 5.1 cu ft Capacity and LED Lighting error E20 myself?

Yes — the top-ranked community fix ("Replace Ice Maker Mold Heater Assembly") is rated medium difficulty and takes about 50 minutes. Tools needed: Phillips screwdriver.

How much does it cost to repair Thermador T18IF905SP 18 in Column Freezer with 5.1 cu ft Capacity and LED Lighting error E20?

DIY cost: $35-$55. 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 T18IF905SP 18 in Column Freezer with 5.1 cu ft Capacity and LED Lighting have?

The Thermador T18IF905SP 18 in Column Freezer with 5.1 cu ft Capacity and LED Lighting has 8 other known error codes, including: E1 (Evaporator Sensor Failure), E10 (Ice Maker Water Valve Fault), E11 (Freezer Door Gasket Leak), E12 (Drain Pump Failure), E13 (Main Temperature Sensor Short Circuit), and 3 more.

Which other Thermador models have the E20 error?

Error code E20 also appears on 3 other Thermador models: DWHD770WFP 24 in 39 dBA Emerald Series Dishwasher with Steam Cleaning and WiFi, ME302WS Masterpiece Wall Oven, T36BB925SS 36 in 20.9 cu ft Freedom® Collection Built-In French Door Refrigerator with 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 T18IF905SP 18 in Column Freezer with 5.1 cu ft Capacity and LED Lighting have?

The Thermador T18IF905SP 18 in Column Freezer with 5.1 cu ft Capacity and LED Lighting has 8 other known error codes:

E1 — Evaporator Sensor Failure (2 fixes)
E10 — Ice Maker Water Valve Fault (2 fixes)
E11 — Freezer Door Gasket Leak (2 fixes)
E12 — Drain Pump Failure (2 fixes)
E13 — Main Temperature Sensor Short Circuit (2 fixes)
E14 — High Limit Thermostat Open (2 fixes)
E15 — Door Heater Circuit Fault (2 fixes)
E16 — Ice Maker Fill Tube Frozen (2 fixes)

Which other Thermador models have the E20 error?

Error code E20 also appears on 3 other Thermador models:

DWHD770WFP 24 in 39 dBA Emerald Series Dishwasher with Steam Cleaning and WiFi (dishwasher) · 2 fixes
ME302WS Masterpiece Wall Oven (oven) · 2 fixes
T36BB925SS 36 in 20.9 cu ft Freedom® Collection Built-In French Door Refrigerator with ThermaFresh System (refrigerator) · 2 fixes

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