When your fridge sounds like it’s working but your food is still warming up, something is definitely wrong. It can be frustrating, especially when you check the appliance and everything seems to be running normally. However, just because a fridge is humming doesn’t mean it’s cooling properly. In fact, this issue is one of the most common problems we see in homes across Edmonton.
That is to say, while the unit may appear functional, the cooling process could be compromised in several ways. Our goal here is to help you understand what could be causing this issue so you can take the next step in diagnosing or repairing it safely.
The Thermostat May Be Set Incorrectly
It might sound too simple, but sometimes the thermostat setting is the root of the problem. Fridges with digital or manual temperature controls can occasionally get bumped or adjusted accidentally. Therefore, the fridge continues to run, but the cooling mechanism isn’t engaging to the level needed.
To clarify, when a thermostat is set too warm, the compressor won’t cool the fridge efficiently, even though it’s technically running. In some cases, users may misread the temperature scale, especially on older models. So before jumping to conclusions, it’s worth checking and resetting the thermostat to the recommended range.
If the issue persists after adjusting the setting, that’s usually a sign that the thermostat itself could be malfunctioning. Our team has found that faulty thermostats can disrupt the feedback loop between the temperature sensor and the compressor. As a result, you might hear the motor running while the internal temperature stays warm.
The Evaporator Coils Could Be Frosted Over
Another common issue we’ve seen involves frost buildup on the evaporator coils. These coils are responsible for absorbing heat from the fridge compartment. But when they freeze over, airflow becomes restricted and the cooling efficiency drops sharply. Consequently, your fridge runs constantly trying to meet a temperature it can’t achieve.
For instance, if your freezer seems fine but the fridge is warm, frozen coils may be the culprit. During normal operation, a defrost heater melts any accumulated frost in cycles. However, if the heater, timer, or defrost thermostat fails, ice builds up fast. In other words, what should be a self-regulating system becomes a blocked one.
We often recommend turning off the fridge entirely and allowing it to defrost for at least 24 hours. Meanwhile, keep your food safe in a cooler or backup unit. Once defrosted, check if airflow returns and if the cooling starts working again. If the problem returns after a few days, it may be time to check the defrost components in detail.
The Condenser Coils Might Be Dirty
Although the evaporator coils are inside, the condenser coils are located behind or beneath your fridge. Their job is to release heat that the refrigerant absorbed inside the unit. However, when these coils get clogged with dust or debris, the fridge can overheat internally. As a result, it compensates by running longer than usual while still failing to maintain proper cooling.
To clean these coils, we always unplug the appliance first. After that, using a coil brush or vacuum cleaner, we carefully remove layers of dust from the entire surface. Even a small improvement in airflow here can make a big difference in cooling performance.
Most importantly, we recommend regular cleaning at least twice a year. This helps prevent long-term buildup that could stress the compressor or damage internal components. If cleaning doesn’t help and the cooling still fails, the problem may be deeper within the sealed refrigerant system or the fan motors.
The Evaporator Fan Might Not Be Spinning
The evaporator fan is crucial for circulating cool air throughout your fridge. When it’s not working, you’ll notice uneven temperatures, especially in the fresh food compartment. Therefore, even if the fridge seems to be running, it might not be cooling where it matters most.
Likewise, when this fan fails, the freezer often stays cold while the fridge warms up. In some situations, the fan may hum or make a clicking sound but won’t spin. In other cases, it might be completely silent. To clarify, this typically indicates a failed motor or obstruction around the blades.
Replacing an evaporator fan isn’t overly complex, but it does require removing the back panel of the freezer and checking for electrical continuity. Our team handles these replacements often because it’s one of the more reliable fixes once airflow is compromised. If your fridge has been noisy lately or cycling air unevenly, this fan deserves a closer look.
The Start Relay May Have Failed
The start relay helps kick the compressor into gear each time it’s needed. When this small part fails, the compressor either won’t turn on or will cycle erratically. Most importantly, a broken relay means the compressor runs but doesn’t sustain its cooling cycle. Therefore, the fridge hums, but cooling doesn’t happen properly.
In many cases, you can hear a clicking sound every few minutes as the fridge tries and fails to start. This is often a sign that the start relay is overloaded or burnt out. For instance, if the relay smells burnt or rattles when shaken, it’s likely damaged.
Replacing the start relay can be a quick and effective solution. However, it must match the compressor model exactly. Otherwise, the new part may not work or could cause further damage. If you’re unsure, it’s better to schedule a service with professionals who understand compressor systems thoroughly. You can find more information about our fridge repair service in Edmonton for this specific problem.
Issues with the Main Control Board
The control board is like the brain of your refrigerator. It manages cooling cycles, fan speeds, defrost cycles, and temperature sensors. When it starts failing, different components may stop responding. Consequently, your fridge might run constantly but not cool at all, or it might cool only certain areas.
In the same vein, the symptoms can appear similar to other issues like bad relays or sensor errors. That’s why identifying a faulty control board requires a step-by-step diagnosis. For example, checking voltage outputs, software errors (in digital models), and visual signs of damage like burned sections.
We usually test the board only after other parts like the thermostat, fans, and relays have been cleared. Because it’s one of the more expensive parts to replace, it’s important not to assume it’s the issue without a proper inspection. If you’re dealing with this situation and need reliable input, you can reach out through our appliance repair contact form for fast help.
Faulty Temperature Sensors
Every modern fridge relies on temperature sensors or thermistors to monitor internal conditions. When a sensor fails, it may send incorrect readings to the control board. Therefore, the board may believe the fridge is too warm or too cold and respond inappropriately.
For instance, the compressor might run non-stop even if the fridge is already cool. In other cases, it won’t run at all because the sensor falsely reports low temperatures. To clarify, this is a communication problem between key components rather than a mechanical failure.
Replacing a faulty sensor involves testing resistance levels using a multimeter. If the readings fall outside the expected range, it usually means the part is faulty. These sensors are relatively inexpensive, but the symptoms they cause can mimic much more serious problems. That’s why we always test them early in our diagnostic routine.
Final Word
We know how urgent it feels when your fridge is running but not cooling—especially when food starts spoiling. From temperature settings to broken relays, many issues can be resolved if diagnosed early. At Edmonton Repair Appliances, our team understands how frustrating these situations are. We focus on clear diagnostics, safe solutions, and proven repairs you can rely on.
For help with appliance repair in Edmonton or if you’re unsure what to check next, we’re ready when you are. You can always reach out to us directly through our contact page for trusted service.
Frequently Asked Questions
Why is the freezer cold but the fridge section warm?
This usually points to a problem with airflow. If the evaporator fan is not working or if frost is blocking the vents, cold air can’t circulate to the fridge section properly.
What causes a fridge to make noise but not cool?
If you hear humming or clicking but the fridge stays warm, it could be a faulty compressor start relay, damaged control board, or frost-blocked evaporator coils.
Can a dirty condenser coil stop a fridge from cooling?
Yes. When the condenser coils are coated in dust or debris, they can’t release heat efficiently. This causes the compressor to overheat and run without cooling the fridge.
How do I know if my fridge thermostat is broken?
A malfunctioning thermostat may cause the fridge to cool inconsistently or not at all. You may also notice that adjusting the dial has no impact on the internal temperature.
Is it worth repairing a fridge that won’t cool?
In many cases, yes. Common issues like faulty relays, fan motors, or sensors are affordable to fix. A full diagnosis is the best first step before considering replacement.