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If your freezer isn't freezing, the temperature control thermostat could be to blame. Troubleshooting a Chest Freezer That Doe... Troubleshooting a Chest Freezer That Doesn't Cool. A defective defrost bi-metal prevents the defrost heater from working, causing frost to build up on the evaporator, causing a warmer freezer interior. Your mercury vial should now be reset. problems contact webmaster@doityourself.com. submitted to our "DoItYourself.com Community Forums". The compressor is a pump that an electric motor rotates. There are many signs of a failed refrigerator defrost timer. to this site, and use it for non-commercial use subject to our terms of use. When the thermostat has a consistent reading, you should see a Ohms setting of 0. The defrost heating element melts frost from the evaporator fins to improve cooling. Pry off the connectors, using a pair of thin pliers if necessary, and remove the wires. WARNING: Mercury is toxic when inhaled or ingested, so proceed with caution before handling it. For freezers with an automatic defrost system, a broken defrost heating element or failed defrost bi-metal thermostat can prevent the defrost system from melting frost off the evaporator. Copyright© If the thermistor doesn't sense that the freezer is warm, the electronic control board won't turn on the compressor. Have a service technician replace the compressor, because this repair requires access to the sealed refrigerant system. Adjust the freezer door if it's not sealing properly. A failed condenser fan motor can inhibit freezer cooling because air doesn't move across the condenser coils to cool the refrigerant before the refrigerant enters the evaporator. A faulty relay on the electronic control board can also prevent the control board from sending power to the compressor. It moves air across the condenser coils to help cool the hot refrigerant coming out of the compressor. WARNING: Some thermostat components contain toxic substances, so think carefully about whether you want to troubleshoot it yourself. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. Use the advice and tips in these articles and videos to get the most out of your freezer. The control board activates the compressor to keep the freezer cold and runs the fans. The freezer won't cool properly when the evaporator fan breaks. home improvement and repair website. Some of these are an inability for the refrigerator to go into a defrost cycle and revert back to cooling, the refrigerator defrosts all of the time, or the refrigerator doesn't defrost any time. The defrost thermostat on your fridge is an important piece of equipment which prevents your freezer from becoming too cold. Anything more than that, and the thermostat is defective. The freezer will cool to temperature t... my fridge had a frozen defrost drain tube and leaked into bottom section. When this is done, leave for around 10 minutes, and then turn the nut in the opposite direction, until the connection closes again. The cold control thermostat senses freezer temperature and turns on the compressor to keep the freezer compartment cold. Lubricate the door seal with a light coat of petroleum jelly occasionally to prevent air leaks into the freezer. This step-by-step repair guide shows how to replace a chest freezer thermostat in less than 30 minutes. I have Honeywell T8000C thermostat. If any of these problems occur, you should check the defrost thermostat first, in order to rule this in or out as the cause of the problem. Need help finding the right filter for your refrigerator? This repair guide and video show how to replace a freezer defrost thermostat with step-by-step instructions. Turn off your power, and then remove the wiring from the thermostat, and connect them to your defrost heater. You should check the voltage continuity of your thermostat, using a multimeter. If the cold control sensor fails or the internal contact inside the cold control isn't sending current to run the compressor, the freezer won't cool. You'll typically see frost on the evaporator cover when the defrost system isn't working because the defrost heater isn't turning on to melt frost off the evaporator fins. This DIY repair guide shows how to clean the refrigerator condenser coils in 4 easy steps. However, from time to time, these devices can apparently fail, and cause problems which include leaks upon the floor, a warm refrigerator portion, or a freezer section which has ice forming across the back. A failed refrigerator defrost timer will usually result in a temperature change within the refrigerator. Replace the defrost heating element if it's damaged or not heating. DoItYourself.com®, founded in 1995, is the leading independent Learn how to use a multimeter to check for wiring problems in an appliance that's not working. Website operating If the evaporator fan doesn't run when activated, replace it. If your freezer is warm and you don't hear the hum of a fan, the evaporator fan could be broken. However, if after 20 minutes the freezer still has not begun to defrost, then you will need to remove the back wall, and look at the thermostat itself. The condenser fan is in the machine compartment of the freezer next to the compressor. View our Privacy Policy here. The electronic control board uses the reading from the thermistor to cycle the compressor on and off to maintain freezer temperature. After this time, if the freezer has begun to melt, then you will need to check the thermostat, as it is definitely the cause. Keep track of the models you own in your profile. Benefit from other people's experience by checking on these frequently asked questions about freezers. You can check the connections are not corroded, and also pass some paper along the surface of the connectors, as this will clear away any dirt. When it trips, the defrost bi-metal shuts off the defrost heater. Learn how to repair broken, frayed or damaged wires in your appliances. This should automatically trigger a warming of the freezer section. If the defrost heating element fails, excessive frost covers the evaporator fins. A service technician will need to replace the compressor because that repair requires recovery and recharge of the refrigerant. The sensor bulb on the cold control thermostat monitors freezer temperature. All information is provided "AS IS." This should be easily managed when you are looking at the thermostat, the wires will be evident. The evaporator fan mounts on the evaporator assembly. A faulty compressor won't compress the refrigerant in order to cool the freezer properly. While the wires have been removed, you can also examine them for signs of damage. Does the ice cream in your freezer seem too soft or the beverages in your refrigerator not cold enough? © 2020 Transform SR Brands LLC. This should be stuck to the evaporator coil. Questions of a Do It Yourself nature should be Discover the value of being a card member. Replace the thermistor if it's not sensing freezer temperature accurately. Also, check the condenser coils to see if the coils are dirty-dust on the coils can prevent air from cooling the refrigerant. Not sure if I have fan problem or therm... Troubleshooting two-wire thermostat system. This step-by-step repair guide and video show how to replace a freezer defrost heater. There's a lot going on in a fridge — components aplenty can all affect performance, like the coolant, condenser coils, door seals, the thermostat and even the ambient temperature in the living space. All rights reserved. Follow the instructions in your owner's manual for cleaning the condenser coils. Connect your probes to the thermostat, and turn it on. Dust-covered refrigerator coils can prevent the refrigerator and freezer from running efficiently and cooling properly. Unplug the refrigerator before accessing and cleaning the coils. If your upright freezer isn't cooling and its interior back wall is covered with frost, the defrost thermostat could be the problem. A failed cold control thermostat can also prevent the freezer from cooling properly. If your freezer isn't cold and you don't hear the fans or compressor running, the electronic control board could be the problem.

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