On legacy Sub-Zero PRO 48 refrigerators, the 648PRO and 648PROG, code 45 relates to the overhead lighting. The control could detect lighting errors on units with red door switches; that detection has since been disabled. If…
On legacy Sub-Zero PRO 48 refrigerators, the 648PRO and 648PROG, code 45 relates to the overhead lighting. The control could detect lighting errors on units with red door switches; that detection has since been disabled. If you still see it, the interior lights may not turn on, may flicker, or may stay dim. Cooling is not affected. It is mostly a convenience issue, though worth checking during any service visit.
1) Open and close each door to see whether the lights respond. 2) Check that the door switch is not stuck or blocked. 3) Turn the unit off at the breaker, then back on. 4) Use a flashlight for now if needed. 5) Mention code 45 when booking service.
No. It concerns the overhead lighting only. Your food stays cold, so the repair can wait for a convenient appointment, though dark shelves are an everyday annoyance worth fixing.
Lighting detection was tied to units with red door switches and has since been turned off. If an older unit still shows it, we check the lights and switches to confirm what is happening.
We test the light assembly, the door switch and the wiring, then replace whichever part is bad. We quote the job in writing before we begin.
A technician diagnoses it on site and gives you the price in writing before any work starts.
