Repair or replace · Denver, CO
One of the two compressors is gone, the other is fine
One compartment has given up while the other carries on as though nothing has happened. That split is information, not a puzzle, and it narrows the bill before anyone touches the cabinet. Sub-Zero Pro Repair Denver — (720) 704-2791.
(720) 704-2791 · on the road 8:00 am – 8:00 pm, seven days
Two systems in one cabinet
Sub-Zero builds its combination refrigerators with individual refrigerator and freezer systems rather than one plant and a shared air path. That is a design choice about food, not about servicing, but it is the reason a failure here arrives as half a cabinet instead of a whole one.
The service data settles any argument. Normal operating pressures are published model by model with a refrigerator line and a freezer line listed separately, and the notes on that table even allow for whether one or both systems are running when a reading is taken. Two sets of figures because two systems.
Reading the half that still works
The compartment that is fine is the most useful thing on the job. Power, the condenser, the board and everything else the cabinet shares are all doing their work, which is why one side is unaffected — so the fault is boxed inside a single circuit before the grille comes off.
What it does not tell us is whether the surviving system is healthy or merely still going. It gets metered too, because the decision here is not about the dead compressor. It is about what is left.
What we measure before we answer
- 01 Air temperature in both compartments, against both set points Establishes which system is down and proves the other is doing its job, which is the difference between one figure and two.
- 02 Start-up current on each compressor in turn A compressor drawing locked-rotor current and dropping out has failed. One that draws nothing has not been asked to run.
- 03 Pressures on the failed side only, once everything else is cleared The manufacturer publishes operating pressures separately for each system, so one circuit can be judged without touching the other.
- 04 Condenser and the machine-bay air the two systems share Shared parts are eliminated before either compressor is blamed, because a shared fault would not leave one side untouched.
Repair
On a combination cabinet this is the ordinary answer, and the reason is simply that half the refrigeration is still working.
- Buying replaces the healthy system along with the failed one. Repairing keeps a circuit that has given no trouble and owes you nothing.
- Sub-Zero's own service data lists normal pressures separately for the refrigerator and for the freezer on every combination model, which is what lets one side be quoted alone.
- Standalone all-refrigerator and all-freezer columns carry a single system. On those the question is not which side, only whether.
Replace
The picture changes when the surviving system turns out to be surviving rather than healthy.
- A second circuit reading marginal on current or pressure means you are not weighing one repair against a cabinet. You are weighing two against it.
- A cabinet already opened once for sealed-system work, now losing a compressor on the other side, has stopped being a single incident.
- Where the failed side also needs a board, the figures stack and the gap to a new cabinet narrows.
Both compartments get read, both compressors get metered, and the shared parts get cleared before anything is named. If one system is genuinely gone and the other is genuinely well, we recommend the repair and say what it covers. If the second circuit is also drifting, you hear that on the same visit rather than six months later.
The two numbers this turns on
- Sealed system, compressor included
- $1,480–$3,420
- Buying instead: a comparable built-in replacement, before installation and cabinetry work
- $11,970–$20,280
$89 buys a full diagnosis rather than a look, and it is deducted from the price of the repair the moment you give the go-ahead. Bands are ranges because the part settles the figure and the part is not known until the cabinet has been read. You get the exact number for your unit before any work starts.
Three follow-ups
- Do all Sub-Zero built-ins really have two compressors?
- Combination cabinets do. Sub-Zero designs individual refrigerator and freezer systems into them, and its service data prints a separate pressure set for each one. Single-compartment columns run one system only. Sub-Zero Pro Repair Denver can confirm yours on (720) 704-2791.
- Can I go on using the compartment that still works?
- Generally yes. The working system is independent of the failed one and is not being loaded by it. Keep the dead compartment shut so the cabinet is not fighting warm air, and move anything perishable across. Questions on (720) 704-2791.
- Is one compressor half the price of two?
- It is one sealed-system job rather than two, and the band below covers it. The exact figure depends on which circuit is down and which part is needed, and you get it after the reading. Call Sub-Zero Pro Repair Denver on (720) 704-2791.
Get the readings before you get a quote
Describe the symptom on the phone and you will usually hear what it probably is before anyone drives out. A $89 service call covers the visit and the full diagnosis in Denver, and comes off the repair once you approve it.
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Read before quoted
Stored codes first, then air and coil temperatures, then amp draw at start-up, then pressures only if everything in front of them has been ruled out. The readings decide the quote, not the other way round.
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Refrigeration only
Built-ins, panel-ready columns, undercounter units, ice makers and wine cabinets. No ranges, no dishwashers, no split attention.
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We will say do not
A sealed-system repair runs $1,480–$3,420. On some cabinets that is money well spent and on some it is not, and you get told which before anything is opened up.
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Reachable hours
Technicians are out 8:00 am – 8:00 pm, seven days. Someone picks up at any hour, so a failure overnight does not have to wait for an office to open before it is on the list.