The answer first
When a Craftsman refrigerator stops holding temperature while clearly still running, the question is whether cold air is being made or simply not delivered. A freezer that is still hard with a warm fresh-food compartment is a delivery problem; both compartments warm together points further back, at the sealed system or the condenser. What follows is arranged by likelihood rather than by how interesting each cause is.
What this looks like from the outside
- The fresh-food side is warm while the freezer is still hard — A split like this is the signature of a delivery fault, and it narrows the list immediately. Time it roughly, as the pattern matters more than the exact interval.
- A sheet of frost on the back wall of the freezer — Frost that has gone from a light dusting to a solid sheet is a defrost system that is no longer keeping up. If the answer is clear, stop here and act on it.
- The condenser area underneath is packed with dust — Dust on the coil is the cheapest cause of poor cooling and the one most often overlooked.
- NEAR MISS: nothing runs at all and nothing is cold — That is a starting fault rather than a cooling fault, and the page for a cabinet that will not start is the right one. It is the sort of check a technician does first, for the same reason.
Likely causes, ordered
- A stalled defrost cycle icing the evaporator — Ranked first because it is common, gradual and completely hidden until somebody takes the rear freezer panel off, which is why owners describe it as sudden.
- A failed or blocked evaporator fan — Second because it is the one moving part in the cold air path: bearings wear, frost jams the blade, and the moment air stops moving the fresh-food side warms while the freezer stays passable. Check whether anything changed in the house around the time it started.
- Blocked air vents inside the compartments — It belongs on the list because it is free to fix and because it is genuinely common after a big shop. It earns this slot because it explains the whole symptom rather than part of it.
- A sealed-system or compressor fault — Last, and the only entry that is not owner work: a low charge, a restriction or a tired compressor all present as poor cooling, and none of them can be diagnosed without gauges.
The diagnostic order
- Hold the freezer door closed and listen for airflow — Silence inside the freezer while the compressor runs points straight at the evaporator fan or the ice around it. Doing it in this order is what keeps the diagnosis short.
- Look at the frost pattern on the freezer rear wall — A light film is normal; a solid sheet is a defrost fault. It earns this slot because it explains the whole symptom rather than part of it.
- Compare the two compartments honestly — Freezer hard and fridge warm means airflow. Doing it in this order is what keeps the diagnosis short.
What an owner can safely check
- Vacuum the condenser coil and the area around it — Power off, plinth or rear panel off, soft brush and vacuum. Take the dust away rather than pushing it deeper into the fins. Stop if anything about it feels wrong rather than pressing on.
Tools: vacuum, soft brushAbout 30 min
- Clear the internal vents and repack the compartments — Leave a hand’s width in front of the rear vents, and stop packing items against the back wall where the air comes out. It takes less time than reading about it.
About 15 min
- Check the seals and clean the gasket line — Warm soapy water into every fold, then a paper test around the perimeter to confirm the door is actually gripping. Take a photograph before you disturb anything you will have to reassemble.
Tools: cloth, mild detergentAbout 20 min
- Go no further than this without test gear — What is left is diagnosis rather than inspection, and diagnosis needs instruments.
What to turn off before you start
Safety
Pull the plug before anything else; a wall switch is not proof the appliance is dead. The power being off is not the same as the machine being safe to touch immediately. Refrigerant work is licensed work: a line opened without the right recovery gear vents the charge and turns a repair into a replacement. Work with the door mechanism intact rather than around it.
When to stop and call
One rule decides it: you own everything you can reach without a panel coming off inside the compartment; the rest needs gauges and a licence. It is drawn where the next step stops being reversible. Call promptly if frost or water keeps returning after you have cleared it, because something is still feeding it.
Related pages of the same kind
Generalized information
One page cannot be both general and exact, and this one is general by design.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
