Whirlpool Refrigerator ET4WPKYKT02 Won't start or doesn't start

The Whirlpool Defrost Timer is an OEM replacement part for Whirlpool refrigerators. The defrost timer regulates the automatic defrost cycle, which prevents ice buildup on the evaporator coils in the freezer compartment by sending a signal to the defrost heater to turn on and melt any ice buildup on the coils. 

Causes of a bad defrost timer can include mechanical wear over time, electrical failures, or internal component damage. Prolonged usage and voltage spikes can also affect the timer's functionality.

Symptoms of a bad Defrost Timer include:

• Excessive frost buildup in the freezer compartment
• The refrigerator or freezer not maintaining the set temperatures
• Unusual noises coming from the appliance 
• The appliance running continuously without cycling off

This OEM Whirlpool part can also be used on Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore/Sears brand appliances.

This start relay mounts on the side of the refrigerator's compressor and momentarily powers the start winding so the compressor can start reliably—helping restore consistent cooling and eliminating repeated click-and-no-start issues.

• Provides the initial boost to start the compressor, then disengages automatically
• Supports proper refrigerator and freezer temperatures by ensuring reliable compressor starts
• Common symptoms of a failing relay: warm temps, compressor won't start, rapid clicking or humming from the rear, or repeated overload trips
• Intermittent cooling after power cycling can also point to a weak start relay

• Unplug the refrigerator before servicing; pull the unit forward to access the rear
• The start device is under a small cover on the compressor side; remove the cover to access
• If a run capacitor is present, discharge it before handling any wiring
• Note wire positions and relay orientation; push the new relay straight onto the compressor pins without bending terminals, reinstall the cover, and restore power

A thermal overload protector that helps prevent motor damage by cutting power if the dryer motor overheats. Fits the motor assembly and restores normal operation once the motor cools. What it does:

• Detects excessive motor temperature and interrupts power to prevent motor burnout
• Helps stop the motor from running when overheating occurs
• Commonly replaced when the dryer won't start or the motor hums but does not turn
• Can prevent further electrical damage by opening the circuit during thermal faults

• One thermal overload protector

• Disconnect power to the appliance before servicing to avoid shock or injury
• Located on or near the dryer motor; note wire locations or take a photo before removal
• Replace with the correct PN and secure terminals firmly; do not force connections
• Check motor bearings, start components, and wiring if symptoms continue after replacement

This compressor overload is a thermal protector that opens the circuit if the compressor overheats or draws excessive current. Replacing a failed overload restores reliable starts and helps prevent compressor damage when your refrigerator won't cool.

• Protects the compressor by interrupting power during overheat/overcurrent conditions
• Common symptoms: refrigerator not cooling, compressor won't start, repeated clicking or brief hum then shutoff
• Mounts on the compressor terminal and works alongside the start relay on applicable models
• Built for proper fit and dependable operation in the start circuit

• Unplug the refrigerator and remove the rear access panel to reach the compressor
• Note wire positions; pull the old overload straight off the compressor pin
• Push the new overload fully onto the correct terminal and reconnect wiring/terminal cover
• Restore power and verify the compressor starts without repeated clicking