C-h1 Serious Moderate DIY

Samsung Microwave C-h1 — Convection Heater / Thermistor Fault

Samsung Microwave · Error code C-h1

What C-h1 Means

On convection microwaves, the control could not bring the convection heater up to target temperature in the allowed time, or the convection thermistor read open/short.

Symptoms

  • C-h1 during convection or combo cook
  • Long preheat with no completion
  • Microwave-only cycle still works

Common Causes

1
Failed convection heating element

Element open, no heat produced.

2
Failed convection fan motor

Without circulation, heater never reaches sensor.

3
Failed convection thermistor

Wrong feedback to control.

4
Tripped thermal cutoff (TCO) on heater

One-shot fuse opened during a prior over-temp event.

5
Failed main control board

Heater relay on PCB failed open.

How to Fix It

  1. Unplug the microwave and discharge the HV capacitor.
  2. Ohm the convection heating element — open = replace.
  3. Verify the convection fan spins freely; replace motor if seized.
  4. Test the convection thermistor against the model's resistance chart.
  5. Check inline thermal cutoffs near the heater for continuity; replace any that are open.
  6. If all subcomponents test good, replace the main PCB.

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.

Common replacement Samsung convection microwave heating element View on Amazon→ Common replacement Samsung microwave convection fan motor View on Amazon→ Common replacement Microwave thermal cutoff fuse View on Amazon→

More Samsung Microwave Codes

-dr- -dr- — Door Open (Demo / Reminder) 5E 5E / SE — Touchpad Shorted (Older Spelling) C-21 C-21 — Cavity Over-Temperature C-22 C-22 — Cavity Thermistor Open C-A0 C-A0 — Communication Error Between Boards C-A1 C-A1 — Humidity Sensor Open Circuit

All Samsung codes → All microwave codes →

Verified against manufacturer documentation: samsung.com

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