Power to the heater is controlled by the control board. is good if it has continuity between the leads and no continuity to ground. Remove the back or bottom panel using a Phillips screwdriver to expose the defrost timer. Older refrigerators didn't have a defrosting function, but people also did their laundry on a rock and sometimes kids looked like the milk man… In modern times a functional refrigerator defrost system is pretty important! Over time frost that is not removed will build up eventually forming solid ice. Ice acts as an insulator preventing the cooling coil from lowering the temperature in the freezer compartment to the desired setting. Get the Best Deals on Frigidaire 241508001 Refrigerator Defrost Control Board. Most refrigerators have one heater. Suitable for 240545403 240554501 240554502 240375803 EAP2582247 1614983 AP4909015 5304429380 241508001 5303918302 PS2582247 parts and more. I would guess I have a few days before the frost builds up again. In Frigidaire refrigerators as well as other manufacturer's models, the defrost timer is the device that regulates the cooling mechanisms and keeps the unit's components from freezing up. (thermostat) is good if it has continuity when cooled below 40 degrees. otherwise we'll assume you're okay to continue. To initiate a defrost cycle, open the door and push the light switch in and out 5 times within 6 seconds. The compressor and fans should shut off and the defrost heater should come on. at that point the control board should send electricity through the bi-metal defrost thermostat to the defrost heater. Heaters will be fastened to the bottom of the cooling coils in the freezer section. Power is routed through the defrost termination switch (thermostat) to the heater. Wait a few minutes, then replace the panel that concealed the defrost timer. Learn how to adjust your settings. Remove the back or bottom panel using a Phillips screwdriver to expose the defrost timer. Defrost timer or control board. Defrost Thermostat; Control Board; Defrost Heater; The defrost thermostat and defrost heater can and SHOULD be checked with the refrigerator unplugged! The water (melted ice) runs down the cooling coils into a trough below the coils. Food can be protected by continuing to defrost manually as needed until the repair is made. stops the heater from thawing the food in the freezer during the defrost cycle. Repair Services; Frigidaire 241508001 Refrigerator Defrost Control Board . The timer will be on the back or the bottom of your model. The freezer (and refrigerator) will operate normally after the ice is removed. Turn the notch located on the face of the defrost timer counterclockwise until it is turned completely. There are obviously lots of different styles of refrigerators in the world today… and not all of them work the same. Temperature sensors can be tested by reading the resistance (ohms) at room temperature. The defrost system prevents the buildup of frost and ice by periodically initiating the defrost cycle. Defrost Heater; Defrost termination switch (thermostat). Wait a couple of minutes before you turn on the compressor so your refrigerator can run a diagnostic. Side Note: I have had mixed luck with the control boards used on these models Part#5303918476 I have very little confidence in the quality of this replacement part. Listen for the fan motor to stop turning; this means the timer is off and is resetting. Side Note: I have had mixed luck with the control boards used on these models Part#5303918476 I have very little confidence in the quality of this replacement part. The heat from the heater will melt the frost and ice on the cooling coil. The defrost termination switch (thermostat) will cycle power to the heater off and on for the duration of the defrost cycle. You will need a multimeter... Get One Here!! Food in the freezer is soft and cold drinks in the refrigerator are no longer as cold as they have been. The timer will be on the back or the bottom of your model. The defrost termination switch (thermostat) is mounted to the coil at the top. If there is no ice then the defrost system is working normally and you must look elsewhere for the source of your refrigerator malfunction. If the rest of the defrost circuit test okay, or works when you force the defrost, the control is what you need to get your refrigerator working again. First thing to do is figger out whether your fridge uses the good ol’ mechanical defrost timer or the new-fangled and problematic Adaptive Defrost Control (ADC) board.