Skip to content
Appointment timing depends on ZIP code, route capacity, and access.
Call (310) 554-8899
Kenmore appliance service
Error Code

Kenmore Range 3d/21 Error Code

Plain-language guidance for Kenmore code 3d/21 on Range — symptoms, safe checks, and when to call a technician.

Book a Repair (310) 554-8899
  • Upfront Estimates
  • Approval Before Repair
  • Expert Technicians
  • Workmanship Warranty

At a glance

Error code overview

A plain-language snapshot of 3d/21 for Kenmore Range — confirm the model series before you act.

Lena Hart Written by Lena Hart Appliance Repair Content Specialist Published October 20, 2026

Content status Verified

Error code 3d/21
Appliance Range
Quick answer

3d/21 reports a defective oven temperature sensor on the Kenmore 665 model freestanding range.

Model compatibility

Kenmore reuses codes across series and model years, so 3d/21 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.

Plain language

What this code means

Defective oven temperature sensor.

Seeing 3d/21 means the range has flagged its oven temperature sensor as defective. This pair belongs to the Kenmore 665 model freestanding range and shares one manual entry with 3d/11, 3d/12 and 3d/22.

What a technician and owner can expect

The manual begins with disconnecting power or unplugging the range. After that comes the sensor wire harness: any loose wires go back on, and the harness is replaced if it shows damage. The sensor is then measured with a volt/ohm meter, which is technician work; a sensor that does not match the manual’s reading is replaced. A sensor and harness that both check out leave the electronic oven control as the replacement.

Also see

  • 3d/22: another sensor code in the same entry
  • 1d/21: oven too hot in Clean mode
  • 9d/11: oven door lock assembly defective

Kenmore range service in Los Angeles

Need a hand with a 3d/21 display on your Kenmore range? Los Angeles households can reach service at (310) 554-8899. Write down the exact code, the model number and what you already tried before calling; the range repair page lists what is covered.

Source: Sears PartsDirect – Kenmore 665 model freestanding range error codes (slash format)

Caution

Safety warning

Important safety warning

Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.

Get started

Seeing this code on your Kenmore appliance?

Book a specialist Kenmore service visit for a clear estimate and approval before any repair. Experienced technicians, clear diagnostics, and workmanship coverage on completed repairs.

Book a Repair (310) 554-8899
Service areas

Available in these areas

Get started

Ready to restore your Kenmore appliance?

Book a repair online or call us — clear estimates, approval before any work, and a workmanship warranty on completed repairs.

Book a Repair (310) 554-8899

Book a repair

Tell us about your Kenmore we’ll take it from there

Share your model, symptom, and ZIP in Los Angeles County or Orange County and we’ll confirm an appointment. Prefer to talk? Call us during business hours.

(310) 554-8899
Phone (310) 554-8899
Email info@kenmorelosangeles.support
Hours Mon–Sat: 8:00 AM – 7:00 PM
Service area Kenmore appliance repair across Los Angeles County and Orange County.
Response time Appointment timing depends on ZIP code, route capacity, and access.