Repair or replace
One Compressor of Two Has Died. Repair Half a Machine?
- Signed
- Dean Halvorsen
- Role
- Refrigeration technician — sealed systems and airflow
- Certification
- EPA Section 608 certified
- Published
Straight answer
Usually, yes. On a built-in combination the fridge and the freezer each have their own compressor and sealed system, so repairing the failed one leaves the other's refrigerant alone. You are paying for one complete repair, not half a machine. Sub-Zero Repair Edmonds checks the working side as well: (206) 210-3547.
To replace it
$12,110–$21,200
a like-for-like new built-in, with the fitting and any cabinet work still to pay on top
Half the machine is a whole system
Sub-Zero’s design guide says its built-in combination models use dual refrigeration, with two compressors, and the serial tag its service manual illustrates lists a separate refrigerant charge for each section. When one compressor dies, the repair opens only that section’s system: its refrigerant is captured, the compressor changed, a new filter-drier fitted, then the system is cleared out and recharged. The working section’s system is not opened at all.
The sum is therefore the one printed above for a single sealed-system job, set against a new built-in that would throw out the healthy half along with the dead one.
Will the other compressor be next?
Nobody can honestly promise either way. What can be done is a proper look at the working half on the same visit: whether it reaches its setting, cycles off normally and runs without strain. That look stops short of gauges. Sub-Zero’s service manual keeps entry to a sealed system for temperature problems the other checks cannot explain, so a healthy side is judged by how it behaves rather than opened up to be inspected.
No need to decide tonight
The section that still works keeps its own food cold, which takes the hurry out of the choice. Use the time to get the figure in writing and to look hard at the cabinet, because its condition, more than the surviving compressor, is what should weigh most.
Repair makes sense when
- The working section reaches its setting, cycles off and shows no sign of the same trouble.
- Cabinet, doors and gaskets still seal on both sections.
- The fault stops at one compressor and its own system.
Replace it when
- The working half is slipping too: running long, drifting warm, or already repaired once.
- The shell is failing around both systems, with sagging doors or a split liner.
What we check first
- Power at the silent compressor, its start parts and a winding test, before the compressor itself is blamed.
- How the working half runs: whether it reaches its setting and switches off when it should.
- The cabinet and the door seals on both sections.
Questions people ask next
Why not put gauges on the healthy side while the unit is open?
Because gauges mean entering that sealed system, and Sub-Zero's service manual keeps that step for temperature problems nothing else explains, with solder-on valves when it is taken. A side that holds its setting and cycles normally gives no reason to open it. It is judged by how it runs, which tells a technician a good deal without adding new joints.
How is it known to be the compressor and not something both sections share?
If both sections were warm, the shared parts would be suspected first. When one side is fine and the other sits at room temperature with a silent compressor, the search narrows: power reaching that compressor, its start parts, the control output that calls for it, then the compressor. Sub-Zero Repair Edmonds tests them in that order: (206) 210-3547.