You open the freezer — everything is frozen solid, just as it should be. Then you open the fridge section and feel warm air. The milk is borderline, the leftovers are questionable, and you’re standing there wondering how the two compartments can be so different when they’re part of the same appliance.
This specific combination — freezer working, fridge not cooling — is something we see regularly on service calls across Winnipeg. It’s not a random failure. It has a handful of known causes, and once you understand how a fridge actually moves cold air between compartments, the problem makes a lot more sense.
How a fridge and freezer share cold air
Most refrigerators don’t have two separate cooling systems. They have one — located in the freezer section — and a fan that pulls cold air from the freezer and pushes it into the fridge compartment through a vent. The freezer stays cold because it’s where the evaporator coils are. The fridge section stays cold because of that continuous airflow from the freezer.
That’s exactly why this problem happens. If anything interrupts that airflow — a blocked vent, a failed fan, a frozen evaporator, a broken damper — the freezer keeps working fine while the fridge loses cooling entirely. The refrigeration system itself is intact. The problem is in the delivery.
The most common reasons your fridge isn’t cooling
Evaporator fan has stopped working
The evaporator fan is the component responsible for pushing cold air from the freezer compartment into the fridge section. It sits behind a panel at the back of the freezer and runs continuously while the compressor is on. When this fan fails — either because the motor has burned out or because ice buildup is blocking the blades — cold air stops moving into the fridge entirely.
A quick way to check: open the freezer and listen. If the compressor is running but you hear no fan, or you hear it struggling and stuttering, the evaporator fan is likely the issue. This is one of the more common repairs we handle, and the fan motor is a straightforward replacement.
Frost buildup on the evaporator coils
Refrigerators have an automatic defrost system that melts any ice that accumulates on the evaporator coils every 8 to 12 hours. When that defrost system stops working — because of a failed defrost heater, a faulty defrost thermostat, or a malfunctioning control board — ice builds up on the coils over days and weeks until it completely blocks airflow.
At that point, no cold air can move from the freezer to the fridge. The freezer stays cold because the coils are still there, just buried in ice. The fridge goes warm because the airflow path is blocked.
You can sometimes confirm this by removing the back panel inside the freezer. If the evaporator coils are completely encased in a thick layer of frost or ice, that’s the problem. A temporary fix is to unplug the fridge for 24 to 48 hours with the doors open to let everything defrost — but without fixing the defrost system itself, the ice will simply build back up within a week or two.
Damper control not opening
The damper — sometimes called an air diffuser — is a small door or flap that controls how much cold air flows from the freezer into the fridge compartment. It opens and closes automatically based on the fridge’s temperature. If the damper gets stuck in the closed position, cold air can’t enter the fridge no matter how well the rest of the system is working.
A stuck damper can be caused by ice forming around it, a broken actuator, or a failed thermostat that controls it. In some cases, manually defrosting the fridge resolves the issue if ice was the cause. If the actuator or thermostat has failed, the part needs to be replaced.
Blocked vents inside the fridge
This is the most straightforward cause — and the easiest to fix yourself. If items inside the fridge are packed tightly against the vents at the back wall, cold air coming in from the freezer has nowhere to go and can’t circulate properly. The fridge section ends up uneven — warmer at the front, slightly cooler at the back — or warm throughout if the blockage is significant.
Check that nothing is pushed directly against the vent openings at the back of the fridge interior. Rearranging how food is stored is sometimes all that’s needed.
Door seal letting warm air in
A fridge door gasket that’s torn, hardened, or no longer sealing properly allows warm air to seep in continuously. The fridge struggles to maintain temperature, the compressor runs more than it should, and the fridge section — which is less thermally stable than the freezer — warms up noticeably.
Test the seal by closing the door on a piece of paper. If you can slide the paper out without resistance, the gasket isn’t sealing. Gaskets are relatively inexpensive to replace and make a significant difference in both cooling performance and energy efficiency.
Thermistor or temperature sensor failure
The thermistor monitors the temperature inside the fridge and tells the control board when to run the compressor and fan. If it fails, the fridge has no way to accurately sense its own temperature. It may not call for cooling when it should, leaving the fridge section warm while the freezer — which has its own temperature feedback loop — continues to function normally.
A faulty thermistor requires diagnosis with a multimeter to confirm and replacement by a technician.
What to check before calling a technician
Before booking a service call, it’s worth going through a few quick checks that don’t require any tools.
First, make sure the fridge temperature setting hasn’t been accidentally changed — this happens more often than you’d think, especially in households with young children. Second, check that nothing inside the fridge is blocking the rear vents. Third, listen for the evaporator fan running inside the freezer when the compressor is on. Fourth, inspect the door gasket for visible damage or gaps.
If none of those reveal an obvious cause — or if the fridge has been gradually getting warmer over days or weeks — the issue is almost certainly one of the mechanical or electrical causes described above, and it needs a technician to diagnose correctly.
How urgent is this?
More urgent than most appliance problems. A fridge that isn’t cooling is actively putting food at risk. Health Canada guidelines recommend keeping the fridge below 4°C — once the temperature climbs above that, perishable food enters the danger zone and should be discarded after two hours.
If you’re in Winnipeg and your fridge has stopped cooling, we offer same-day and next-day service in most cases. The sooner the diagnosis, the better the outcome — both for the appliance and for the food inside it.
Frequently asked questions
Why is my freezer cold but my fridge warm?
The most common causes are a failed evaporator fan, frost buildup on the evaporator coils blocking airflow, or a stuck damper that prevents cold air from entering the fridge compartment. All three involve the same root issue — cold air is being produced in the freezer but isn't reaching the fridge section.
Can I fix a fridge that's not cooling myself?
Some causes can be addressed at home — clearing blocked vents, replacing a worn door gasket, or manually defrosting if ice buildup is the issue. Mechanical and electrical causes like a failed evaporator fan motor, defrost system components, or a faulty thermistor require a technician with the right tools and parts.
If I defrost the fridge manually, will it fix the problem permanently?
Not if the defrost system is the underlying cause. A manual defrost clears the ice and temporarily restores cooling, but if the defrost heater, thermostat, or control board isn't working, ice will build up again within one to two weeks and the problem will return. The defrost system itself needs to be repaired.
How long can food stay safe in a fridge that's not cooling?
According to Health Canada, perishable food should not be kept above 4°C for more than two hours. If your fridge has been warm for several hours, check each item carefully before consuming. When in doubt, discard — particularly meat, dairy, and prepared foods.
Is a fridge that's not cooling worth repairing?
In most cases, yes. The components responsible for this problem — evaporator fan motors, defrost heaters, thermistors, damper assemblies — are serviceable parts that cost far less than a new refrigerator. A technician can give you an honest assessment of the repair cost and whether it makes sense for the age and condition of your appliance.
How quickly can Quick Fix come out for a fridge repair in Winnipeg?
In most cases we can schedule a same-day or next-day visit. Given that a non-cooling fridge involves food safety, we treat these calls as priority. Reach us by phone or through our website to book.
