Sub-Zero Designer/BI Code 45-2-00: Freezer lights not lighting

What 45-2-00 means

Current Designer units like the DEC3050R and Classic BI models such as the BI-48SD/S both use 45-2-00 from the lighting group. Designer units list it as Zone 2 open, while the BI calls it freezer open. The control found an open circuit in the lights for that compartment, so they stay off when the door opens. Cooling, defrost and ice production are not affected.

Common causes of 45-2-00

Light assembly in Zone 2 (freezer) open
Disconnected light plug
Broken wire behind trim

✓ One safe check you can try

1. Check whether the lights in the freezer or Zone 2 come on at all. 2. Look for loose trim near the lights and do not force it. 3. Make sure the door closes fully so the switch is engaged. 4. Book service when convenient; the unit can run normally until then.

! Why to stop there

Light wiring sits behind trim panels in the freezer.
Cold plastic trim can crack if removed incorrectly.
Finding an open requires testing each section.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Refrigerator codes

23Sub-Zero 600, 700 and 648PRO Code 23: Defrost overheat with no feedback 50Sub-Zero 600 and 700 Series Code 50: Refrigerator compressor running too long 41Sub-Zero 648PRO Code 41: Zone compressor or wiring problem 81Sub-Zero 700-2 Code 81: Variable-Speed compressor fails to start 82Sub-Zero 700-2 Code 82: VS compressor controller needs replacement 88Sub-Zero 700TF Code 88: Board and compressor controller not talking 80Sub-Zero 700TF Code 80: No inverter feedback after a board change ddSub-Zero 600 and 700 Series Display dd: Diagnostics switched off

45-2-0045-2-00 questions

Why are only my freezer lights out?

45-2-00 covers the lights in Zone 2 on Designer units or the freezer on Classic BI units. The fresh food lights are on a separate circuit, so they keep working.

Is it urgent?

No. The freezer keeps cooling normally, and defrost and ice making are not affected. You can schedule the repair at a convenient time and use a small flashlight in the meantime.

How is it repaired?

We test the freezer lights and the wiring behind the trim, then replace whatever is open. A written price comes first, and our 30-day workmanship warranty covers the work.