The short answer
Before suspecting the appliance, look at the room. A garage fridge fails in summer because it cannot reject heat and in winter because it stops cycling, and both look exactly like a fault. A thermometer in the cabinet and one in the room settles it.
What you actually see and hear
- Cool but not cold through a hot spell, compressor running constantly — Heat load exceeding what the cabinet can reject.
- Fridge fine but freezer section thawing in cold weather — The winter failure: the thermostat is satisfied by the cold room and stops running the compressor.
- Warm all round with a coil you cannot see for dust — A garage classic and entirely fixable.
- Warm with no sound from the compressor at all — Power, start circuit or thermostat rather than heat load.
- NEAR MISS - condensation all over the outside of the cabinet — Humidity in an unheated room, not a cooling fault.
Causes, most likely first on this machine
- Room temperature outside the cabinet's design range — First, and it works in both directions. Too hot and the condenser cannot shed heat; too cold and the control simply stops asking the compressor to run.
- A dust-blocked condenser coil — Second, and close to universal in a garage. A coil packed with dust cannot reject heat even in a moderate room.
- Clearance blocked by stored items — Third. A second fridge collects boxes around it and often against it, which is the same fault as a blocked coil by another route.
- Door seal worn or distorted with age — Fourth. Older cabinets have older seals, and a seal that will not hold paper is letting warm damp air in continuously.
- Thermostat drift or failure — Fifth. Old thermostats wander, and a cabinet that used to be fine at a mid setting may need a different one, or may need the part.
- Compressor or sealed system — Last. On an older cabinet this is usually the point at which replacement is the better answer.
Check in this order, and why
- Put one thermometer in the cabinet and one in the room — Two readings explain more than any amount of listening.
- Clean the coil before anything else — It is the highest-value action in a garage and it costs nothing but time.
- Clear everything stored against and around the cabinet — Air has to get to the coil and away from it.
- Test the seal with paper all round — An old seal is a slow, invisible drain on a cabinet in a warm room.
What an owner can safely check
- Put thermometers in the cabinet and in the room and read both after a day — Establishes whether the room or the appliance is the problem.
Tools: thermometerAbout 1440 min
- Vacuum the condenser coil thoroughly — In a garage expect to find far more than you would in a kitchen.
Tools: vacuum, soft brushAbout 30 min
- Move stored items away from the sides and back — Give the cabinet real clearance on every side.
About 20 min
- Test the door seal with paper and clean the seal and frame — Replace nothing yet - clean first, because residue is often the whole problem.
Tools: paper, clothAbout 20 min
- Adjust the thermostat one step and wait a full day — Chasing the dial hides the trend you are trying to see.
Tools: thermometerAbout 10 min
- STOP HERE if the compressor never runs or clicks repeatedly — Start circuit or sealed system, not an owner repair.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel - a capacitor can hold a charge after the power is off. A second fridge is often on an extension lead in a garage: switch off at the breaker rather than trusting a socket switch, and keep water away from the lead. Never chip frost off a cooling plate with anything metal - the tubing behind it is thin and a puncture ends the appliance.
When to call a technician
Call when the coil is clean, the cabinet has clearance and a good seal, the room is within a sensible range and it still cannot reach forty degrees Fahrenheit. Say how old the cabinet is when you call, because on a second fridge the honest advice is often that a sealed-system repair is not worth it. If the freezer section is thawing in a cold garage, describe that specifically - it is a control and ambient problem, not a cooling failure, and it needs a different answer.
Nearest pages of this class
What this page does not cover
This page is written for the overflow or second refrigerator class, not for one family or model line. Where a brand- or model-specific page exists for your unit it is the more specific answer and it is linked above, so go there first if your machine is named. What is deliberately not here: compressor and relay part numbers, thermostat calibration figures, refrigerant charge and shelf dimensions, all of which differ by family and belong on the page for that family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
