Samsung · Microwave Serious

C-h0 — Undocumented (Confirm for Your Model)

C-h0 is not listed in Samsung’s official US/CA microwave error-code references, so its meaning cannot be confirmed. Samsung’s documented sensor codes are C-10/11/12 (gas/PH), C-20/21/22 (temperature), C-70/71/72 (steam/humidity), and C-d0 (door/key). If your unit shows C-h0, verify the exact meaning in your model’s manual or with Samsung support before replacing parts; it may be a mistranscription of a documented code.

Keep using it?
Limited use only
DIY difficulty
Hard

How to fix it

  1. Stop using the unit and let it cool fully.
  2. Clean grease and charcoal filters and clear all vent paths.
  3. Verify convection fan operation on power up.
  4. Measure the convection thermistor against the service chart.
  5. If thermistor and fan are OK, replace the main control board (stuck heater relay).
  6. If unsure or comfort with HV components is low, call service.

Why it happens

Typical signs: C-h0 mid convection cycle · Hot smell · Cycle stops and fan runs to cool

  • Blocked vents or filters Heat can't escape; cavity overheats.
  • Failed convection fan motor No air movement across the heater.
  • Shorted convection thermistor Reads abnormally high.
  • Failed heater relay on main PCB (stuck closed) Heater stays energized past target.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • Microwave grease/charcoal filter Common replacement
    Amazon →
  • Samsung microwave convection thermistor Common replacement
    Amazon →
  • Samsung microwave main control board Common replacement
    Amazon →

More Samsung microwave codes

5E 5E / SE — Touchpad Shorted (Older Spelling) C-21 C-21 — Cavity Over-Temperature C-22 C-22 — Temperature Sensor Error C-A0 C-A0 — Functional Error C-A1 C-A1 — Functional Error (Damper / Sensing) C-A2 C-A2 — Functional Error

All Samsung codes → All microwave codes →

Frequently asked questions

What does the C-h0 code mean on a Samsung microwave?

C-h0 is not listed in Samsung’s official US/CA microwave error-code references, so its meaning cannot be confirmed. Samsung’s documented sensor codes are C-10/11/12 (gas/PH), C-20/21/22 (temperature), C-70/71/72 (steam/humidity), and C-d0 (door/key). If your unit shows C-h0, verify the exact meaning in your model’s manual or with Samsung support before replacing parts; it may be a mistranscription of a documented code.

What causes the C-h0 code on a Samsung microwave?

Blocked vents or filters: Heat can't escape; cavity overheats. Failed convection fan motor: No air movement across the heater. Shorted convection thermistor: Reads abnormally high.

Is it safe to keep using a Samsung microwave with a C-h0 error?

Limited use only. This is rated a serious-severity fault.

How do I fix C-h0 on a Samsung microwave?

Stop using the unit and let it cool fully. Clean grease and charcoal filters and clear all vent paths. Verify convection fan operation on power up.

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.