Hitachi Microwave Error C01

⚡ Quick Answer: The Hitachi microwave C01 error indicates that the door was opened while the weight sensor was undergoing zero-point adjustment. This interruption can... ✅ DIY Fixable

What Does Error C01 Mean?

The Hitachi microwave C01 error indicates that the door was opened while the weight sensor was undergoing zero-point adjustment. This interruption can cause the microwave to stop functioning and display the C01 error until the door is closed and the adjustment process is resumed. Users may hear unusual buzzing sounds as a result of this malfunction.

Common Symptoms:

  • C01 appears on display after door opened during a calibration or self‑adjustment process
  • Microwave stops and shows C01 until door is closed and adjustment resumed

Possible Causes

  • Weight sensor zero‑point adjustment interrupted by opening the door (medium)

How to Fix Error C01

DIY Fix Resume weight sensor calibration

  1. Ensure the microwave door is fully closed
  2. Press the Cancel button on the microwave
  3. Allow the microwave to complete the weight sensor zero‑point adjustment

Technician Only Check door switch and sensor circuitry

  1. Verify that the door latch/switch actuators are functioning correctly
  2. Confirm the weight sensor calibration completes normally
  3. Inspect wiring to control board and sensor assemblies for damage

Parts needed: Door interlock switches, Weight sensor assembly, Control board (if sensor communication issues present)

🛑 When to Call a Pro:
  • If C01 persists after the door remains closed and repeated Cancel/Restart attempts fail
  • If there are signs of door latch failure or the microwave does not operate normally

Technical Specifications

wattage 1000W
component Magnetron
resistance 0.5-1.5 ohms
part_number M-202D
voltage_rating 120V AC

Common Questions

What does C01 error mean on Hitachi microwave?

C01 indicates the door was opened during weight sensor calibration, interrupting the process.

Can I fix Hitachi microwave C01 error myself?

Yes, close the door and press Cancel to allow weight sensor adjustment to resume.

How much does it cost to fix C01 error?

Repair costs vary; door switches are typically low cost, while control board repairs may be higher.

When should I call a technician for C01?

Call a technician if C01 persists after closing the door and retrying, or if there are signs of door latch failure.

Data last verified: 2026-07-07

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