The short answer
On a KEG draught cabinet, warm beer and a warm cabinet are two different faults. Beer warm at the tap with the box cold is a tower problem, not a refrigeration problem, and it is the commonest version of this complaint by a distance. The first check below separates the two in a minute. Where these usually stand, the room is the variable that moves most, so start there rather than inside the unit.
What you observe
- The keg is cool but the cabinet reads warm — A full keg is a large cold mass and hides a drifting cabinet for days.
- The compressor runs constantly and never satisfies — Points at heat rejection or a door that is not sealing.
- NEAR MISS — nothing runs and nothing is cold — A supply or control fault; read the page for a cabinet that will not start.
Causes, most likely first on a KEG refrigerator
- Ambient heat and load beyond its capacity — Id: ambient — Every cabinet is rated for a room-temperature range and only so much warm content at once. A hot garage, a sunlit corner or a full load put in warm all give a unit that runs constantly and reads warm. It ranks first here because it is both the commonest finding on this kind of unit and the cheapest one to rule out. It moves up a place here because of where these units actually live: a warm room is a permanent load rather than an occasional one.
- Warm tower and lines, not a warm cabinet — Id: keglines — Second: beer standing in the tower between pours warms to room temperature. The first glass comes out warm and foaming while the keg and the box are both cold. Establish this first: it is the commonest version of the complaint and not a refrigeration fault at all. Pour a glass, discard it, pour again.
- Condenser coil cannot shed its heat — Id: condenser — Third: the coil at the back or underneath dumps the heat pulled out of the box. Blanketed in dust, or boxed in with no air path, it cannot, and the cabinet drifts warm however long the compressor runs.
- Sealed system or compressor fault — Id: sealed — Last, and the reason the order matters: a leak, a blockage or a compressor that no longer pumps gives a cabinet that runs and never cools. It is the least common cause here and the only one that is not an owner repair.
Check in this order, and why
- Look at the room, the sun and what went in warm — Placement and load show up here before anything internal does. First because it is the top-ranked cause above and costs nothing.
- Pour a glass, discard it, pour a second — A cold second pour after a warm first settles the question. Second because its cause ranks second above.
- Find the condenser and feel whether it is hot and clean — Warm and clean is right; furred is the finding. Third because its cause ranks third above.
What an owner can safely check
- Pour one glass and discard it, then pour a second — It separates a warm tower from a warm cabinet in under a minute.
About 5 min
- Move it somewhere cooler for a day and compare — A few degrees of room temperature change what a small unit can hold.
About 30 min
- Read the box with a thermometer in a glass of water inside — Air temperature swings at every opening; water reads what the beer sees.
Tools: thermometerAbout 15 min
- STOP HERE if the next step needs a meter on live terminals or the sealed system — That is where owner checks end and a service call begins.
Before you open anything
Safety
Unplug the cabinet before removing any panel; a capacitor can hold a charge after the power is off. The gas bottle is the other hazard: a carbon dioxide cylinder is a pressure vessel, it must stand secured, and a leaking bottle in a closed room is a suffocation risk. Attempt nothing on the sealed system.
When to call a technician
Call once the seals, the coil, the clearance and the setting are proven good and it still will not hold temperature — that points inside, where owner checks end. Call immediately for oil at the compressor or tubing, or a smell of burning: oil outside the pipework means the system is open. Tap, line and regulator parts come from draught suppliers; refrigeration parts come from the seller of the cabinet.
Nearest pages of this class
What this page does not cover
This page covers KEG refrigerators as a class, not one family or model line. Where a family- or model-specific page exists for your unit, that page is the more specific answer. Not here: wiring colours, board part numbers and charge figures. It is draught cabinets built around a keg, a gas bottle and a tap tower rather than around shelves.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
