❄️Refrigerator

F13

Thermador · T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System

Thermador T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System F13 Error Fix: Freezer Defrost Sensor Fault

The defrost sensor in the freezer has failed or is out of specification, causing improper defrost cycle timing. This results in frost buildup and reduced cooling efficiency inside the freezer compartment.

Medium severity2 fixes available✨ Free fix available

Quick Answer

Error F13 on the Thermador T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System means: Freezer Defrost Sensor Fault. The top-ranked community fix is “Replace Freezer Defrost Sensor” (medium difficulty, ~30 min, DIY cost: $20-$40). 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

Sensor MalfunctionPrimary

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: $110-$160.

Other Thermador Models with Error F13

MED301JS 30 in Masterpiece Series Single Wall Oven with 4.3 cu ft Capacity and Steam Bake

oven · 2 fixes

PODS301W 30 in Wall Oven with 4.3 cu ft Capacity and Convection Cooking

oven · 2 fixes

PRD366WGU Pro Grand Range

oven · 2 fixes

PRD486WDGU Pro Grand 48"

oven · 2 fixes

PRL366WG 36 in Pro Grand Range with 5 Burners, 22,000 BTU Power Burner, and Convection Oven

oven · 2 fixes

Other Thermador T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System Error Codes

Evaporator Fan Motor Failure

2 fixes

F10

Freezer Door Gasket Seal Failure

2 fixes

F11

Ice Maker Fill Tube Frozen

2 fixes

F12

High Temperature Alarm

2 fixes

F14

Water Filter Bypass Detected

2 fixes

F15

Ice Maker Motor Jammed

2 fixes

F16

Door Hinge Temperature Sensor Fault

2 fixes

F17

Ice Maker Mold Thermistor Open

2 fixes

People Also Ask About Thermador T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System Error F13

What does error code F13 mean on a Thermador T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System?

Error code F13 on the Thermador T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System means: Freezer Defrost Sensor Fault. The defrost sensor in the freezer has failed or is out of specification, causing improper defrost cycle timing. This results in frost buildup and reduced cooling efficiency inside the freezer compartment.

How do I fix error code F13 on my Thermador T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System?

The most successful fix is "Replace Freezer Defrost Sensor" (medium difficulty, ~30 minutes). Estimated DIY cost: $20-$40. HomeMD has 2 community-ranked fixes for this error.

Is error code F13 on a Thermador T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System 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 T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System error F13 myself?

Yes — the top-ranked community fix ("Replace Freezer Defrost Sensor") is rated medium difficulty and takes about 30 minutes. Tools needed: Phillips screwdriver, Multimeter.

How much does it cost to repair Thermador T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System error F13?

DIY cost: $20-$40. Professional repair typically costs $110-$160. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Thermador T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System have?

The Thermador T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System has 8 other known error codes, including: F1 (Evaporator Fan Motor Failure), F10 (Freezer Door Gasket Seal Failure), F11 (Ice Maker Fill Tube Frozen), F12 (High Temperature Alarm), F14 (Water Filter Bypass Detected), and 3 more.

Which other Thermador models have the F13 error?

Error code F13 also appears on 5 other Thermador models: MED301JS 30 in Masterpiece Series Single Wall Oven with 4.3 cu ft Capacity and Steam Bake, PODS301W 30 in Wall Oven with 4.3 cu ft Capacity and Convection Cooking, PRD366WGU Pro Grand Range, PRD486WDGU Pro Grand 48", PRL366WG 36 in Pro Grand Range with 5 Burners, 22,000 BTU Power Burner, and Convection Oven. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Thermador T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System have?

The Thermador T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System has 8 other known error codes:

F1 — Evaporator Fan Motor Failure (2 fixes)
F10 — Freezer Door Gasket Seal Failure (2 fixes)
F11 — Ice Maker Fill Tube Frozen (2 fixes)
F12 — High Temperature Alarm (2 fixes)
F14 — Water Filter Bypass Detected (2 fixes)
F15 — Ice Maker Motor Jammed (2 fixes)
F16 — Door Hinge Temperature Sensor Fault (2 fixes)
F17 — Ice Maker Mold Thermistor Open (2 fixes)

Which other Thermador models have the F13 error?

Error code F13 also appears on 5 other Thermador models:

MED301JS 30 in Masterpiece Series Single Wall Oven with 4.3 cu ft Capacity and Steam Bake (oven) · 2 fixes
PODS301W 30 in Wall Oven with 4.3 cu ft Capacity and Convection Cooking (oven) · 2 fixes
PRD366WGU Pro Grand Range (oven) · 2 fixes
PRD486WDGU Pro Grand 48" (oven) · 2 fixes
PRL366WG 36 in Pro Grand Range with 5 Burners, 22,000 BTU Power Burner, and Convection Oven (oven) · 2 fixes

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