Nothing wrong with the cabinet and this one entry sitting in memory
A joint, not a part. The heater is doing its work and the lead that proves it has gone high in resistance or come adrift.
No band covers this one — quoted after the diagnosis
Sub-Zero reference · Denver, CO
EC 22 is one wire, and the freezer is usually fine
EC 22 says a defrost began and the control never saw the voltage come back. The temperatures are normally untouched. Sub-Zero Pro Repair Denver meters one lead and both of its ends — (720) 704-2791.
Sub-Zero Pro Repair Denver — (720) 704-2791
Built-In 600-3 Series control, read in Diagnostic Mode
Sub-Zero prints one test against this code and nothing else. Force a defrost; if the compressor picks up five minutes in, the grey and white lead and its continuity back to the board are where the answer sits.
A short list is worth trusting. Nothing here is a complaint about temperature. The control is missing the report it expects as the cycle begins, and a freezer can hold its set point for weeks in that state — while quietly losing the one cycle that keeps its coil clear.
What we measure
- 01 Compartment temperature against its set point This is the entry in the defrost group that normally leaves a freezer working, so a warm cabinet means something else is stored too.
- 02 How long a forced defrost lasts before the compressor picks up Five minutes is the figure the manual puts on it, and that observation is the whole of the test for this entry.
- 03 Continuity from the heater back to its board connection One lead, two terminations. Either it carries the confirmation or it does not, and the meter settles which.
What it usually is
An entry dating from the weeks after a panel came off
A feedback lead left half seated on reassembly. We lift that connector first, because it takes a minute and rules out everything behind it.
No band covers this one — quoted after the diagnosis
Good continuity end to end and the entry still stored
The board's own input. Once the lead proves sound at both ends there is nothing else in the circuit left to blame, and that is the expensive end of a cheap code.
Control board $430–$940
Safe to keep running?
Of the defrost group this is the entry that least deserves alarm. The cycle still runs and the cabinet still holds; what went missing is the confirmation. Resist clearing it on a loop, though — that stored line is the only evidence anyone arrives with.
Where this sits
- All Sub-Zero codes and display states Every code, display state and procedure on one page.
- EC 20 EC 20 stacks an under-heat on a silent feedback wire
- EC 23 EC 23 pairs an overheat with a silent feedback wire
- Freezer Repair Freezer columns, sections and drawers that drift warm, ice over after each defrost, or store a run-time code.
Bench notes from
Tobias Reinhardt
- Trade
- Refrigeration technician — doors, gaskets and cabinet fit
- Years on the tools
- 9
- Metro
- Denver
- Holds
- EPA 608 certified
Checked against
Sub-Zero service manual #7003192 Rev C for the Built-In (600-3) Series: error code table, p. 8-2, and the single test printed against code 22, p. 8-3
Reading it with you
Tell us what the panel is showing and we will tell you what we would measure first. Sub-Zero Pro Repair Denver — (720) 704-2791. On the road 8:00 am – 8:00 pm, seven days.
Read the cabinet before anyone quotes it
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.