When a refrigerated salad bar freezes lettuce or toppings, the cause is usually a set point that is too low, pans sitting directly against the coldest surface, or air from the evaporator blowing straight onto the food. Start with the thermostat and the pan setup; a control that will not hold its setting is a service call.
Shop the equipment in this article: countertop salad bar, reach-in refrigerators and refrigerated displays. Freight is included on every order.
Our commercial salad bar range is all Coldline, and most of those pages list a holding range of 33 to 41 F. Cold holding under FDA Food Code 3-501.16 is 41 F or below, so there is room between safe and frozen, but the low end of that range is close to the point where wet greens and cut fruit start to freeze.
1. The set point is too low
A set point near 33 F leaves little margin. Delicate items freeze first, often at the bottom of the pan or along the side touching the well.
Fix: raise the set point a few degrees, wait an hour, and check food temperatures with a probe thermometer. Aim for food that reads 41 F or below without ice crystals. Check the food, not only the display.
2. Pans touching the coldest surface
Pans that sit on or against the cold well surface pull heat out of the food fastest. Shallow pans with little food in them freeze sooner than full ones.
Fix: seat pans so they rest on the rails as designed, use the pan depth the unit is built for, and keep greens in fuller pans. Many CBT employee-service models list pans up to 6 inches deep; the CBT48-LT page lists nine 1/3 or eighteen 1/6 pans.
3. Cold air blowing on the food
Some units move cold air over the pan area. Food directly in that air stream can freeze while the rest stays above freezing.
Fix: keep the most delicate items away from the outlet, and do not block return air with extra pans or lids, which can make the controller run longer.
4. Leaving the bar running overnight with food in it
Overnight the cabinet is closed, the room is cooler and no one opens it, so the unit cools further than it does during service.
Fix: move delicate items to a reach-in at closing, cover pans, and check the manual for a night or standby setting if your model has one.
5. Ice or frost on the evaporator
Frost changes how the unit cools and can cause swings. A unit that cycles hard after defrost can freeze food at the start of the cycle.
Fix: follow the defrost instructions in the manual and keep the drain clear so melt water does not refreeze.
6. A control or sensor problem
If the bar freezes food even after you raise the set point, the thermostat, sensor or controller may not be reading correctly.
Fix: compare the display with a calibrated thermometer in a cup of water placed in the pan area. If they disagree by more than a couple of degrees, call for service. Coldline salad bars list a 5 year compressor and 1 year parts and labor warranty.
What not to do
- Do not turn the unit off for part of the day to stop freezing; food will warm above 41 F.
- Do not cover greens with wet towels, which freeze to the leaves.
- Do not put warm food in to “balance” the cold; a salad bar keeps cold food cold, it does not cool hot food.
Countertop rails and freestanding bars
The same causes apply to countertop rails such as the CTP48SG and CTP80SS and to freestanding CBT bars. Our countertop vs freestanding salad bar article explains how the two differ.
What to buy
If your bar is old or the control cannot hold a steady temperature, compare current models in our salad bar models guide: CBT self-serve and employee-service tables from 36 to 72 inches and CTP countertop rails from 48 to 80 inches. A probe thermometer is the cheapest tool for finding the problem. Food on display also needs sneeze guards or covers under Food Code 3-306.11; see our buffet and salad bar food safety guide. Your local health department has the final say on how cold holding rules apply. Freight to the 48 contiguous states is included in the price of every salad bar.