📡Microwave

Dacor · DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven

Dacor DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven F1 Error Fix: Open Temperature Sensor

The internal temperature monitoring sensor has an open circuit. The microwave uses this sensor to prevent overheating of the cavity, magnetron, and control components. The microwave will shut down as a safety precaution. Disconnect power and check the temperature sensor connections. Measure sensor resistance — it should show a finite resistance at room temperature (not infinite/OL). If the sensor reads open, replace it. Do NOT bypass the temperature sensor — it is a fire safety device.

High severity2 fixes available✨ Free fix available

Quick Answer

Error F1 on the Dacor DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven means: Open Temperature Sensor. The top-ranked community fix is “Test and Replace the Temperature Sensor” (medium difficulty, ~45 min, DIY cost: $15-$25). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · microwave

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.

When to Call a Professional

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

This is a high severity error — continued use may cause damage or a safety hazard
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: $120-$180.

Other Dacor Models with Error F1

DOB30M977DS 30 in 4.8 cu ft True Convection Wall Oven with WiFi

oven · 2 fixes

DOC30M977DS 30 in 4.8 cu ft Combination Wall Oven with Microwave and True Convection

oven · 2 fixes

DOP48M96DPS 48 in 6 Burner 5.5 cu ft 18,000 BTU Modernist Dual Fuel Range

oven · 2 fixes

DP36M96NDS Pro 36" Dual Fuel

oven · 2 fixes

ER30DSCH Distinctive Dual-Fuel Range

oven · 2 fixes

HWO230PS Heritage Wall Oven

oven · 2 fixes

Other Dacor DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven Error Codes

Touchpad Short Circuit

2 fixes

MECH-LATCH

Door Latch Mechanism Broken

2 fixes

MECH-LIGHT

Interior Cavity Light Failure

2 fixes

MECH-SEAL

Door Seal Deterioration

2 fixes

MECH-TURNTABLE

Turntable Motor Failure

2 fixes

Humidity Sensor Error

2 fixes

People Also Ask About Dacor DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven Error F1

What does error code F1 mean on a Dacor DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven?

Error code F1 on the Dacor DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven means: Open Temperature Sensor. The internal temperature monitoring sensor has an open circuit. The microwave uses this sensor to prevent overheating of the cavity, magnetron, and control components. The microwave will shut down as a safety precaution. Disconnect power and check the temperature sensor connections. Measure sensor resistance — it should show a finite resistance at room temperature (not infinite/OL). If the sensor reads open, replace it. Do NOT bypass the temperature sensor — it is a fire safety device.

How do I fix error code F1 on my Dacor DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven?

The most successful fix is "Test and Replace the Temperature Sensor" (medium difficulty, ~45 minutes). Estimated DIY cost: $15-$25. HomeMD has 2 community-ranked fixes for this error.

Is error code F1 on a Dacor DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven serious?

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Can I fix Dacor DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven error F1 myself?

Yes — the top-ranked community fix ("Test and Replace the Temperature Sensor") is rated medium difficulty and takes about 45 minutes. Tools needed: T20 Torx screwdriver, Digital multimeter.

How much does it cost to repair Dacor DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven error F1?

DIY cost: $15-$25. Professional repair typically costs $120-$180. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Dacor DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven have?

The Dacor DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven has 6 other known error codes, including: F3 (Touchpad Short Circuit), MECH-LATCH (Door Latch Mechanism Broken), MECH-LIGHT (Interior Cavity Light Failure), MECH-SEAL (Door Seal Deterioration), MECH-TURNTABLE (Turntable Motor Failure), and 1 more.

Which other Dacor models have the F1 error?

Error code F1 also appears on 6 other Dacor models: DOB30M977DS 30 in 4.8 cu ft True Convection Wall Oven with WiFi, DOC30M977DS 30 in 4.8 cu ft Combination Wall Oven with Microwave and True Convection, DOP48M96DPS 48 in 6 Burner 5.5 cu ft 18,000 BTU Modernist Dual Fuel Range, DP36M96NDS Pro 36" Dual Fuel, ER30DSCH Distinctive Dual-Fuel Range, HWO230PS Heritage Wall Oven. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Dacor DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven have?

The Dacor DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven has 6 other known error codes:

F3 — Touchpad Short Circuit (2 fixes)
MECH-LATCH — Door Latch Mechanism Broken (2 fixes)
MECH-LIGHT — Interior Cavity Light Failure (2 fixes)
MECH-SEAL — Door Seal Deterioration (2 fixes)
MECH-TURNTABLE — Turntable Motor Failure (2 fixes)
SE — Humidity Sensor Error (2 fixes)

Which other Dacor models have the F1 error?

Error code F1 also appears on 6 other Dacor models:

DOB30M977DS 30 in 4.8 cu ft True Convection Wall Oven with WiFi (oven) · 2 fixes
DOC30M977DS 30 in 4.8 cu ft Combination Wall Oven with Microwave and True Convection (oven) · 2 fixes
DOP48M96DPS 48 in 6 Burner 5.5 cu ft 18,000 BTU Modernist Dual Fuel Range (oven) · 2 fixes
DP36M96NDS Pro 36" Dual Fuel (oven) · 2 fixes
ER30DSCH Distinctive Dual-Fuel Range (oven) · 2 fixes
HWO230PS Heritage Wall Oven (oven) · 2 fixes

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