Error code · Microwave

Code 1d12 on a Whirlpool Built-In Microwave: Temperature Sensor or Control

Medium · inspection needed

Code: 1d12
Appliance: Microwave
Brand: Whirlpool
Warranty: 30-day workmanship

What 1d12 means

On Whirlpool built-in microwaves and microwave drawers, including the WMC50522AS, 1d12 points to the oven temperature sensor, the control, or the wiring between them. It is a circuit message, so it names where to look rather than one failed part. The display shows the code, and cooking that relies on temperature sensing may stop or be disabled until the oven reads normally again.

Common causes of 1d12

Oven temperature sensor reading outside the range the control expects
Oven control reporting the sensor circuit
Wiring or connector between sensor and control
Short glitch cleared by a power cycle

✓ One safe check you can try

1. Cut power to the microwave at its breaker and keep it off for one minute. 2. Turn it back on. 3. Watch the oven for one minute to see whether 1d12 returns. 4. If it does not, run a short cooking test to verify operation.

! Why to stop there

When the code returns we test the sensor and the control separately so we replace only the part that failed the test
Wiring and connectors get checked at the same visit
You see the price in writing first, and our work carries 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.

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Other Microwave codes

FC E7Whirlpool OTR Microwave Connection Code FC E7: Appliance Not Reaching the Internet FC E8Whirlpool OTR Microwave Registration Code FC E8: Entry Mistake FCE8Whirlpool Over-the-range Microwave Registration, FCE8: Wrong Model Selected Feature Not Available or Fault DetectedWhirlpool Built-in Microwave Message "Feature Not Available": Retry or Cut Power LOCWhirlpool Microwave LOC on the Display: Control Lock Is On PFWhirlpool Over-the-range Microwave Showing PF: Power Failure Indicator Press Cancel to ResetWhirlpool Built-in Microwave Message "Press Cancel to Reset": Error Cleared by Cancel F8 E4Whirlpool Microwave Drawer Error Code F8 E4: Exhaust Air Temperature Sensor

1d121d12 questions

Does 1d12 mean the temperature sensor is bad?

Not necessarily. The code covers the sensor, the control and the wiring. A breaker reset clears a temporary glitch. If it returns, we test each piece instead of assuming.

Can I still use the microwave with 1d12 showing?

Cooking that depends on temperature sensing may be blocked while the code is up. We suggest one reset attempt and then leaving it off until we have checked it.

Is a built-in microwave this old worth repairing?

Often yes. Older built-in units are still common in Houston homes. We compare repair cost with the value of the unit and tell you honestly.

Book a visit

Still seeing 1d12?

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

(713) 589-6107