A faulty fridge thermostat will fail to regulate internal cooling. The most common symptoms include the compressor running constantly (freezing food), the fridge not cooling at all, or temperatures fluctuating wildly. This often leads to spoiled food, higher energy bills, and frost buildup.
Signs your refrigerator thermostat might be bad
Resetting a fridge thermostat usually involves a simple power cycle or a control panel adjustment. Unplug the fridge (or trip the circuit breaker) for 5 to 10 minutes. If using a digital dial, set it to "0" or "Off" before restoring power. Then, readjust it to your desired cooling level.
The reset button's location depends on your thermostat type. For older models, it is usually a recessed button on the circuit board (often behind the faceplate) or a dedicated button on the front or side. For modern smart thermostats, you typically reset the device through the digital menu.
Yes, unplugging a refrigerator acts as a reset. It reboots the main control board, clears minor sensor glitches, and resets the compressor. For a simple electronic reset, leave it unplugged for at least 5 to 10 minutes to allow capacitors to discharge.
How can you tell if a thermostat is bad?
The typical thermostat lifespan ranges from 5-10 years, though this can vary based on usage and maintenance. Typically, the thermostat is located inside the refrigerator, usually near the cooling element, and connects directly to the compressor.
The compressor, coils and control board are the most expensive repairs. Your fridge's brand, model and size, plus your location, will impact repair costs. If your refrigerator is more than 6 years old and it will cost you more than half its original price to repair it, consider replacing it instead.
On average, refrigerator repair costs are around £100to supply and fit a new thermostat. Meanwhile, the average cost of a new door seal/gasket to repair your fridge freezer is about£130. However, it's important to know that repair costs are usually made up of three parts: Call-out fee.
Technically, a fridge can run sans a thermostat, as it is just an on and off switch for the compressor. Thus, when the temperature reaches the point that is preset. Generally, it goes off 2 to 3 degrees below that point.
Watch for warning signs like food spoiling prematurely, clicking or buzzing noises, continuous motor running, or excessive frost/condensation. Older units often cost more to repair than replace.
To fix a fridge thermostat, first try resetting the system by turning the dial to 0, unplugging the fridge for 2–3 minutes, and plugging it back in. If it still doesn't cool, you will likely need to test and replace the faulty thermostat.
Replacing a refrigerator thermostat typically costs between $𝟏𝟓𝟎 and $𝟒𝟎𝟎 in total. This range can be broken down into two main parts: the cost of the replacement part itself, which runs from $𝟏𝟎 to $𝟖𝟎, and professional labor, which typically adds $𝟏𝟎𝟎 to $𝟑𝟓𝟎.
Refer to your fridge's user manual if you're not sure where to find it. 2. Remove the old thermostat - Once you've located the thermostat, use a screwdriver to remove the screws holding it in place. Carefully pull out the thermostat from its socket, and disconnect any wires attached to it.
To test a fridge thermostat or thermistor, unplug the refrigerator, locate the thermostat inside the fresh food or freezer section, and disconnect the wires. Use a Multimeter to test the component's continuity and resistance at both room temperature and freezing temperatures.
Disconnect the old thermostat and unscrew the mounting plate. Check the new thermostat instructions for compatibility and wiring guidance. Connect the labeled wires to the new thermostat. Attach the new mounting plate to the wall.
Refrigerator Lifespan FAQs:
Brands like Bosch, KitchenAid, and GE typically have longer lifespans, averaging 14–19 years when properly maintained, compared to Samsung or LG models that average closer to 10–12 years.
A failing thermostat usually shows clear signs: the HVAC or engine behaves erratically, the screen is blank, or the temperature in your home/car does not match the settings.
Replacement of thermostat unit
Upgrading to a new thermostat (unit + installation) typically runs $140 to $350, depending on model and complexity. There is also a broader range—$80 to $440—with variations based on location and type of thermostat.
One of the most common thermostat-related problems that homeowners run into involves incorrect temperature readings. A thermostat that displays incorrect temperature readings can cause significant heating issues. There are several potential causes of an incorrect temperature reading, starting with improper placement.
To hard reset a fridge, unplug the power cord or trip the circuit breaker for 5 to 10 minutes. This clears the main control board, recalibrates internal sensors, and resolves cooling or display glitches. Once the power returns, reset your temperature settings.
Green = Run. The green run light indicates the compressor is running. If the indicator is dark it does not mean the unit is off. The compressor only runs when the compartment temperature is too high.
To quickly get your fridge cooling again, start by checking the simplest fixes: