General Electric Microwave DVM1850DM2BB Won't start or doesn't start

The Microwave Door Switch is an OEM part for GE microwaves, designed to prevent the microwave from operating when the door is open by interrupting the power whenever the door is not securely closed. The door switch is an essential safety feature.

Symptoms of a failing Microwave Door Switch include:

• The microwave not starting or heating
• Running when the door is opened
• Unusual noises when the door is closed  

Causes of a bad Microwave Door Switch can result from repeated opening and closing of the door or slamming that can cause the switch to degrade or become misaligned, leading to intermittent or failure.

This OEM GE part can also be used on Hotpoint, RCA, and Kenmore/Sears appliances. 

The Monitor Switch is an OEM replacement part for GE microwave ovens. Located internally on the turntable control circuit board, this switch monitors rotation of the turntable during cooking cycles.  

Causes of failure involve degradation of the electrical contacts from continuous arcing loads over years of use combined with vibration stresses.

Symptoms of a faulty monitor switch include:

• The turntable no longer rotates or spinning intermittently
• Cooking cycles aborting prematurely with error messages 
• Screeching or grinding noises emanating from beneath cavity
• Visible burnt spots on turntable drive assembly

This genuine GE switch is also compatible with select Hotpoint and RCA models.

This thermostat is a temperature-sensing safety switch used in microwave ovens. It monitors heat and opens the circuit during an over-temperature condition to protect internal components and help prevent damage. What it does:

• Monitors temperature at a specific location inside the microwave
• Interrupts power if overheating is detected to protect components
• Helps safeguard the magnetron and wiring from thermal damage
• Presents as: shuts off mid-cycle, won't restart until cooled, no power, or runs but doesn't heat

• 1 thermostat

• Disconnect power before service; microwaves contain a high-voltage capacitor that can hold a dangerous charge—discharge it properly
• Note wire locations and transfer connections one at a time to the new thermostat
• Mount in the original location with firm, flush contact to the surface for accurate sensing
• Reinstall all covers and safety shields before restoring power and testing