Samsung Microwave or Oven Shutting Off Mid-Cycle, Not Heating, or Tripping on Overheat? The Thermostat Is the Most Common Cause.

The oven/microwave thermostat (thermal cutout) is a one-time or resettable safety device that interrupts power to the heating circuit when the appliance exceeds its safe operating temperature. When it fails — either from a genuine overheat event or from age-related drift — the microwave or oven stops heating entirely, shuts down mid-cycle, or refuses to start. The A01802605 is the genuine OEM replacement thermostat for compatible Samsung microwave and combination oven units.

Symptoms of a Failed Oven/Microwave Thermostat

• Microwave or oven shuts off mid-cycle and won’t restart immediately
• No heat output despite the unit appearing to run normally
• Unit starts but stops heating after a short time
• Microwave turntable spins and light works but no heat is produced
• Oven or microwave trips off after extended use and requires cool-down before restarting
• Unit completely dead — no power, no display (if thermal cutout has blown open)
• Burning smell followed by loss of heat function
• Repeated tripping on the same unit even after cool-down

Part Details

• OEM Part Number: A01802605
• Type: Oven / Microwave Thermostat (Thermal Cutout / Thermal Fuse)
• Compatible Brands: Samsung (verify by model number)
• Function: Interrupts the heating circuit when the appliance exceeds safe operating temperature — protects the magnetron, heating element, and control board from thermal damage
• Safety Note: This is a safety-critical component — always use genuine OEM replacement parts for thermostats and thermal cutouts

Installation Notes

• Skill Level: Advanced — microwave capacitors retain lethal charge even when unplugged
• ⚠️ Critical Safety Warning: Unplug the unit and discharge the high-voltage capacitor before touching any internal components — microwave capacitors can hold 2,000V+ and are potentially lethal
• Allow the unit to sit unplugged for at least 30 minutes before opening, then discharge the capacitor using an insulated resistor or discharge tool
• Photograph all wire connections before disconnecting the old thermostat
• The thermostat is typically located near the magnetron or on the cavity wall — position varies by model
• Note the thermostat’s temperature rating and orientation before removal — install the replacement in the same position
• Do not use a multimeter on internal microwave components while the unit is plugged in
• If you are not experienced with high-voltage appliance repair, have this repair performed by a qualified technician

Compatible Models

Contact us with your full Samsung model number to confirm fitment before ordering.