The Bosch B11CB81SSS is a 24-inch counter-depth bottom-freezer refrigerator from the 800 Series, with 11.0 cubic feet of storage. It is the model people reach for when a standard 36-inch box will not fit: a city apartment, a galley kitchen, an in-law suite, a second refrigerator in a basement bar. What follows is what the B11CB81SSS is, what its dimensions commit you to, and what tends to need attention over its life.
What does the B11CB81SSS actually give you?
Eleven cubic feet is roughly half of a full-size American refrigerator, and the trade is deliberate. You lose the door-in-door bins, the through-the-door dispenser and the sheer volume; you gain a footprint that fits a 24-inch run of cabinetry with the door swinging clear in a room where a wider unit would block a walkway. Counter-depth means the case sits flush with a standard 24-inch counter, so only the door and handle stand proud.
The layout is the European convention: fresh food at eye level, freezer in a drawer underneath. That puts the things you use daily where you can see them and the things you use weekly where you have to bend, which is the right way around for most households. SuperCool drops the fresh-food compartment temperature hard for a few hours after a grocery run, then returns it to the set point on its own, and it matters more on a small box than a large one — 11 cubic feet of air loses and regains temperature quickly when a week of shopping goes in at once. The full specification list lives on the B11CB81SSS model page.
Will it fit, and what does 24 inches really require?
Measure three things, not one. The opening width is the obvious one, and a 24-inch unit wants its stated opening plus clearance, not exactly 24 inches of wall-to-wall space. The depth is the one people get wrong: counter-depth describes the case, and the door plus handle adds inches in front of the counter face. And the height matters where a cabinet bridges the top, because a compact refrigerator is not a short one — the case is tall to recover the volume the narrow width costs.
Then there is air. Every refrigerator rejects the heat it removes through a condenser, and on a compact built into a tight run there is less room for that air to move. Leave the clearances the installation instructions call for at the back and top even if the cabinet would let you close the gap, and keep the toe-kick grille clear. A B11CB81SSS that runs warm in a heat wave is often not a failing compressor but a unit that cannot breathe. Our refrigerator installation guide covers the clearances and the leveling, and counter-depth versus standard depth is the wider comparison if you are still choosing.
How should it be set, and where is the rating plate?
Set the fresh-food compartment to 37 degrees Fahrenheit and the freezer to 0 degrees Fahrenheit, then leave them alone for a day before judging anything. A compact box responds faster than a large one to both the setting and the door being open, so a reading taken ten minutes after a change is meaningless. Our temperature settings guide goes through the numbers and what each control actually does.
The model and serial plate is inside the fresh-food compartment, on the side wall behind the crisper on most units of this generation. Photograph it now rather than when something is wrong: a technician arriving with the right part depends on the full model string and the serial, and reading it upside down behind a full shelf with a flashlight is nobody’s idea of a good start. Home Connect is worth pairing at installation for the same reason — the app is where a door-open alarm or a temperature excursion gets reported before the food notices.
What goes wrong on this model, and what do the codes mean?
A compact bottom-freezer has fewer systems than a French door with an in-door dispenser, so the failure list is shorter. What it does have is a defrost cycle, two compartments to sense, and fans that have to move air through a small space.
- Defrost. The evaporator frosts as it runs and a heater clears it on a schedule. When that cycle stops completing, the coil ices over and cooling falls off gradually rather than all at once. The site files the sensor side of this as E05 and the evaporator sensor itself as E03.
- Fans. The evaporator fan moves cold air between compartments and the condenser fan rejects heat at the back. Either one stalling shows up as uneven temperatures long before anything sounds wrong.
- Door alarms. On a narrow unit the door is used more often and closes against a single gasket. A door alarm that starts appearing is usually a gasket or a leveling problem, not a sensor.
- Gradual warming. If the box is simply not holding temperature, start with our not-cooling guide before assuming the compressor.
Routine care is short: keep the condenser area clean, keep the gasket clean and supple, and do not pack the compartment so full that the vents are blocked. The annual maintenance guide is a twenty-minute job once a year.
Is the B11CB81SSS the right buy?
If the 24-inch width is a constraint rather than a preference, this is a serious appliance rather than a compromise dorm refrigerator — 800 Series build, a proper bottom-freezer drawer, and connectivity you would otherwise pay for. If you have the width for a 36-inch unit and are choosing narrow to save money, you will feel the 11 cubic feet within a month of the first large grocery order.
It also pairs sensibly as a second refrigerator. A household that keeps a full-size unit in the kitchen and wants overflow storage in a basement or a pantry gets a sealed, properly insulated appliance with a real freezer drawer instead of a chest freezer and a beverage cooler taking two separate spots. The caution there is the room: an unconditioned garage swings further in temperature than the control expects, and a refrigerator asked to hold 37 degrees Fahrenheit in a space that reaches 100 in August will run far more than its duty cycle intends. Put it somewhere heated and cooled, or accept that the compressor will work for its living.
One last practical note for a narrow unit: plan the door swing before delivery, not after. The B11CB81SSS is reversible on most installations, and deciding which way it opens after the cabinets are in is a much shorter conversation than discovering the door fouls a wall on the day it arrives.
We are an independent repair company, not a factory service arm. Pricing starts from a diagnostic visit and we confirm the estimate before any work begins. Bosch refrigerator repair covers this model with genuine parts, and you can schedule a visit online or call 1-844-731-6692.
