The short answer
Behind a bar, work out whether the water came from the bar or from the cabinet before diagnosing anything. Both are common: spillage runs down the front, and a busy cooler genuinely produces more condensate than its tray was sized for.
What you actually see and hear
- Water appearing during service but not overnight — Bar spillage and wash-down rather than the appliance.
- Water inside the cabinet at the base — The internal drain is blocked.
- Water at the back or under the cabinet overnight — Condensate tray full or displaced.
- A constant damp patch at the floor joint — Could be either - dry it and watch during a closed period.
- NEAR MISS - condensation on the outside of glass doors — Humid bar air on cold glass. Normal.
Causes, most likely first on this machine
- Bar spillage and wash-down water — First in a bar, and the one most often misattributed. Water poured or washed on the bar top runs down the front and pools under the cabinet.
- Condensate tray overwhelmed — Second. A cabinet opened hundreds of times a service makes far more condensate than the tray was designed to evaporate.
- Blocked internal drain — Third. Sugar residue, label paper and fruit debris are the bar-specific blockage.
- Doors not sealing on worn tracks — Fourth. More humid air in means more condensate to deal with.
- Cabinet not level on a bar floor — Fifth. Bar floors slope to drains, and a cabinet sitting on one leans.
- A genuine appliance fault — Last, and rare in a cabinet with no plumbing.
Check in this order, and why
- Dry everything and watch during a closed period — It separates bar water from appliance water definitively.
- Look inside the cabinet for standing water at the base — That points at the internal drain.
- Pull the cabinet out and check the condensate tray — Expect it to be full in a busy venue.
- Check the doors and the cabinet level — Both affect how much water forms and where it goes.
What an owner can safely check
- Dry the area and check it after a closed night — The only reliable way to attribute water behind a bar.
Tools: towelsAbout 60 min
- Clear the internal drain of sugar residue and label paper — Use warm water and a soft tube, never a metal probe.
Tools: warm water, soft tubeAbout 25 min
- Empty the condensate tray and check it is seated and sound — Put it on a routine in a busy venue.
Tools: towelAbout 20 min
- Clean the door tracks so the doors close fully — Less humid air in means less condensate out.
Tools: clothAbout 20 min
- Level the cabinet, allowing for a sloping bar floor — Shims are a legitimate fix here.
Tools: spirit levelAbout 20 min
- STOP HERE if water reaches an outlet or the ground-fault device trips — Switch off at the breaker and get it looked at before further use.
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 back-bar cabinet sits under a working bar with drinks, ice and spilled liquid above it, so switch off at the breaker rather than trusting a switch, and dry the area before opening anything. A busy bar circuit should be protected by a ground-fault device; if it is tripping, that is the warning it exists to give.
When to call a technician
Call when the drain is clear, the tray is sound and water still collects during a closed period - that means the condensate path has failed rather than blocked. Treat water reaching an electrical outlet behind a bar as urgent and switch the circuit off rather than mopping around it. Where the cabinet is simply making more condensate than its tray can handle, the answer is emptying it on a routine rather than a repair.
Nearest pages of this class
What this page does not cover
This page is written for the undercounter back-bar bottle cooler 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 fan part numbers, sliding door track specifications, condensate tray dimensions and control ranges, 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.
