Repair or replace · Denver, CO
There is a refrigerant leak in the evaporator
Someone has said the unit is low on refrigerant, or a coil that used to frost evenly now barely gets cold. Before that word decides anything, the cabinet gets read in the order the manufacturer sets out. Sub-Zero Pro Repair Denver — (720) 704-2791.
(720) 704-2791 · on the road 8:00 am – 8:00 pm, seven days
A leak is not found by ear
Nobody diagnoses this from a hiss or a coil that looks wrong. It takes two gauges on at once, because the manufacturer’s diagnostic table tells a leak apart from a restriction and from a tired compressor purely by which of the two readings sits low and which sits high. One gauge alone proves nothing.
That is why they go on last. Sub-Zero’s instruction is plain: enter the sealed system only once the error-code guide and the general guide have failed to account for the temperature. Everything cheaper gets worked first.
Where the leak sits changes the job
An evaporator is not a part in the machine bay. It sits inside the compartment it cools, behind the rear panel, which makes a leak there a longer piece of work than a weeping joint reachable with the lower grille off. The obligations do not change with the location: solder-on process valves, and a fresh high-side filter-drier every time the system is opened.
None of that is owner work. What an owner can do is have the cabinet read before the word refrigerant sets a price.
What we measure before we answer
- 01 Evaporator temperature in the failing compartment Sub-Zero's guide sorts warm-cabinet causes by this figure. A coil that never comes down points past the fans and the sensors.
- 02 Compartment thermistor resistance at a known temperature A sensor sitting between 30,000 and 33,000 ohms at 32°F is honest, which removes the cheapest explanation for a cabinet that has stopped holding.
- 03 Condenser face and the air leaving the machine bay Heat that cannot get off the coil makes the same warm cabinet as a shortage of charge, at a fraction of the cost.
- 04 Manifold pressures, through soldered valves, last of all Taken together the two readings separate a leak from a restriction and from a compressor that has simply grown tired.
Repair
A first sealed-system event on a cabinet never opened before is ordinary work, and the band below is the whole of it.
- The charge is not topped up. The leak is dealt with, the high-side filter-drier is renewed, and the system is evacuated and recharged as one job.
- Readings are taken through solder-on process valves, because the bolt-on sort are the ones Sub-Zero warns will weep afterwards.
- On a combination cabinet the second refrigeration system is untouched and keeps whatever life it had before this.
Replace
Buying enters the conversation when the leak is not the only finding, or when this circuit has been opened once already and did not stay sealed.
- An evaporator lives behind the interior rear panel rather than in the machine bay, so it is the longer end of sealed-system work before anything else is counted.
- A leak found beside a failed board, or beside a second circuit already down, stacks bands rather than replacing one.
- Once the system is open the job runs to the end, which is a decision to reach before the valves go on.
Gauges do not go on a cabinet to see what turns up. The written guides come first, and only a genuine low pair puts this page's band on the table. Then both figures sit side by side and you hear which one we would pick.
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
- Can a Sub-Zero just be topped up with refrigerant?
- No. Charge that has gone has gone out through something, and putting more in buys a season at most. The leak has to be found and closed, the drier renewed, the system evacuated and recharged. Sub-Zero Pro Repair Denver — (720) 704-2791.
- How do you know the leak is in the evaporator?
- Pressures establish that a leak exists; where it sits comes from working the circuit at the cabinet itself. We tell you which part of the system it is in before any figure is quoted. Ring Sub-Zero Pro Repair Denver on (720) 704-2791.
- Should the unit be switched off while we decide?
- Usually not, if food is still holding. A cabinet losing charge keeps running and keeps losing ground, so the useful move is to get it read rather than to leave it dark. Call (720) 704-2791 and we will arrange the reading.
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.