Three faults that look identical at the door

August 13, 2026

The most common call we take is some version of “it is not getting cold enough”. It is also the call with the widest range of possible answers, from a five-minute correction to a sealed system repair, and the ones at either end of that range look exactly the same from the kitchen side of the door.

Here is how we separate them, and how much of it you can observe yourself before anyone arrives.

Fault one: short of refrigerant

A sealed system that has lost charge cannot fill its evaporator. The refrigerant boils off partway across the coil, so the coil is cold at the inlet and progressively warmer toward the outlet. If you can see the evaporator, the frost stops in a line partway across it, and everything past that line is dry.

The compressor runs almost continuously because the cabinet never reaches its setting. The freezer usually holds better than the fresh food compartment, because the freezer sits closer to the remaining cooling capacity.

This is the expensive answer, and it is not the most common one, which is why it should never be the first guess. Our technicians hold EPA Section 608 certification, so if it is the answer, recovery and recharge happen on the same visit.

Fault two: short of airflow

Here the refrigeration system is healthy and the cold is simply not getting where it needs to go. The evaporator is uniformly cold and well frosted, but the cabinet is not.

The causes are ordinary. A blocked return path behind the crisper. A fan motor that has stiffened and turns slowly rather than not at all. An air damper stuck part closed between compartments. On a column with a restricted condenser grille, the same complaint arrives from the other direction, because the appliance cannot reject the heat it is collecting.

Airflow faults have a distinctive signature: the freezer is fine, sometimes colder than set, while the fresh food side is warm. If your ice cream is rock hard and your milk is not cold, this is where to look.

Fault three: no defrost

Every frost-free system periodically heats the evaporator to melt the frost off it. When that stops happening, the coil gradually fills with ice until air can no longer pass through it.

The pattern here is the diagnostic. The appliance works perfectly for several days, then slowly loses ground over a day or two, and if the door is left open for a few hours it recovers completely, because the ice has melted. Homeowners describe this as intermittent and nothing else in the list behaves that way. Water pooling under the crisper or freezing in the drain belongs in this category too, because a blocked drain is the same system failing at the other end.

What we do on the visit

We take temperatures at the evaporator inlet and outlet, run the condenser fan and compressor through a full cycle, read the defrost history the control keeps, and measure the air coming off the condenser. That combination distinguishes all three within a single visit, and it is the reason we do not quote parts over the phone.

The measurement matters because two of these three faults are cheap and one is not, and a shop that guesses will guess expensively.

What helps us before we arrive

Tell us which compartment is wrong and which is fine. Tell us whether it is constant or comes and goes. Tell us whether anything changed, including a storm, a power cut, or a delivery that involved moving the appliance. Those three answers usually put one of the three faults at the top of the list before we open the door.

The visit and the diagnosis are a flat $80, credited toward the repair when you approve the work, and you get a written estimate before any part is ordered.