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Error code · Range

Whirlpool Range Code 3D21: Sensing Circuit Test on the Oven

For Whirlpool freestanding and slide-in ranges, such as the WFE525S0HS, 3D21 asks us to examine the oven temperature sensor, the control and their wiring. The control relies on that sensor for every bake and broil, so…

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Code
3d21
Appliance
Range
Brand
Whirlpool
Warranty
30-day workmanship

What 3d21 means

For Whirlpool freestanding and slide-in ranges, such as the WFE525S0HS, 3D21 asks us to examine the oven temperature sensor, the control and their wiring. The control relies on that sensor for every bake and broil, so a doubtful signal causes the code. The oven may behave oddly, stop partway through a cycle, or sit with 3D21 on the display until you cycle the power.

Common causes of 3d21

  • The oven temperature sensor
  • The oven control board
  • Wiring between the sensor and the board
✓ One safe check you can try

1. Turn the range off at the breaker and wait one minute. 2. Turn it on and let the display settle. 3. Watch for 3D21 over the next minute. 4. Start a bake to check that the oven warms. 5. On a gas model, if you ever smell gas, leave and call the gas utility from outside.

! Why to stop there
  • Three parts can set this code and a reset tells us none of the answers.
  • We start with the sensor and its plug, since that is the quickest to rule in or out.
  • The price is written before any repair, with a 30-day workmanship warranty.
Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.
→Same appliance

Other Range codes

PUSH or PSHWhirlpool Range PUSH or PSH: Start Was Not Pressed Sabbath ModeWhirlpool Range Sabbath Mode: Why the Oven Stays On Sabbath, Sab, 5Ab, or 5A7Whirlpool Range Sabbath, Sab, 5Ab or 5A7: Canceling the Mode FEE6Whirlpool Range Code FEE6: Bake Element Circuit FEE7Whirlpool Range Code FEE7: Checking the Broil Element Circuit FEE8Whirlpool Range Code FEE8: Oven Reset, No Part Named Indicator FlashingWhirlpool Range Indicator Flashing: Stuck Key or Control Setting Indicator or Hot Light OnWhirlpool Range Hot Light On: Control Still On or Surface Hot
3d213d21 questions
What should I tell you when I call about 3D21?

Tell us the range model if you can, what the oven was doing, and whether the code returned after a reset. It helps us bring the right parts.

Could a power outage cause 3D21?

A power dip can set odd codes. If 3D21 appears after an outage and does not return after a reset, it was likely temporary. Tell us when the outage happened if you can remember.

Is the sensor easy to reach?

That depends on the model. We do not ask owners to remove panels. We handle the access with the range disconnected. Reach for the reset steps only, and leave the rest to us.

Book a visit

Still seeing 3d21?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 589-6107