Repair or replace · Denver, CO
The control board and the compressor both need work
You have been handed two big items on one quote and the total has started to look like a new cabinet. Before it is accepted, both halves of that claim should be made to prove themselves on a meter. Sub-Zero Pro Repair Denver — (720) 704-2791.
(720) 704-2791 · on the road 8:00 am – 8:00 pm, seven days
Two large items is a claim, not a diagnosis
This pairing turns up on quotes more often than it turns up on meters. A board sits behind every symptom, so it can be blamed for any of them, and a compressor that never started looks exactly like one that cannot. Put those together and a quote writes itself.
Sub-Zero’s own troubleshooting does not work that way. Every path through it reaches replace the control board only at the end: connections checked, continuity proved, and a named terminal read with the compressor running. The board is the last answer in the document, never the convenient one.
What we are really weighing
When both parts genuinely fail, this is the tightest calculation in the section. Two of the biggest bands on one cabinet is a real argument for buying, and the numbers below are printed so you can see it rather than be talked into it.
We will not speculate about what will be available to order; that is settled when the part number is looked up.
What we measure before we answer
- 01 Line voltage at the board terminal feeding the part in question Sub-Zero condemns a board only after a named terminal reads wrong with the compressor running. Voltage present sends the fault back to the part.
- 02 Connections and continuity from the part to its plug on the board A loose plug or a broken run imitates a dead output exactly, and it is the first item on every fault path in the manual.
- 03 Start-up current at the compressor itself Separates a compressor that cannot start from one that was simply never switched on by the board upstream of it.
- 04 Membrane switch continuity, if the panel is the suspect A failed continuity test condemns the control panel assembly, a different part from the board behind it.
Repair
Two bands together still sit well under the cost of buying on most built-ins, and the strip below prints both.
- A board condemned without a terminal reading may not need replacing. Every fault path in the manual reaches the board last, after connections, continuity and a voltage check.
- These are two separate jobs on two separate parts. If the readings allow one to wait, we say which rather than bundling them.
- Genuine parts are used for both, and the sealed-system side is finished properly with a new high-side drier rather than shortened because the bill is already large.
Replace
When both really are gone, this becomes the scenario where the arithmetic is closest, and it deserves an honest hearing.
- Stacking the two largest bands on one cabinet narrows the gap to a replacement more than any other combination in this section.
- If something else damaged the board, the pair in front of you is unlikely to be the end of it. We say so when the readings point that way.
- On a cabinet already opened once for sealed-system work, a board on top of a second compressor is where we stop recommending repair.
We re-test both claims before either is priced. Often one falls away — a plug, a broken run, a part that was never being switched on — and the shape of the decision changes. Where both stand up, you get the stacked figure and the replacement figure side by side.
The two numbers this turns on
- Control board
- $430–$940
- 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
- Why would anyone condemn a board that is working?
- Because a dead output looks identical to a dead board from the front. Without a reading at the named terminal, with the compressor running, the two cannot be told apart. That reading is routine for us. Sub-Zero Pro Repair Denver — (720) 704-2791.
- Can the compressor be done now and the board later?
- Sometimes, and it depends entirely on what the board is failing to do. If it still runs the refrigeration reliably, staging the work is reasonable. We will tell you which order protects the cabinet best. Ring Sub-Zero Pro Repair Denver on (720) 704-2791.
- Does a new board come with a new compressor?
- No, they are two unrelated parts with separate figures, which is why the strip above lists two bands rather than one. Each is quoted on its own once the readings are in. 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.