Sub-Zero Classic BI Code 15-8-00: ice maker relay stays open

What 15-8-00 means

On Classic Built-In refrigerators with electronic control, the BI-36U/S among them, 15-8-00 means the ice maker relay is stuck open. The board tries to power the ice maker, but the relay never passes current, so the ice maker gets no signal to run. Cooling in both sections goes on as normal. What you notice is the ice bin slowly running empty while the rest of the refrigerator works fine.

Common causes of 15-8-00

An ice maker relay on the board that will not close
A loose plug between the board and the ice maker harness
A control board needing repair or replacement

✓ One safe check you can try

1. Make sure the ice maker switch or arm is in the on position. 2. Check that the ice bin is seated correctly. 3. Reset the breaker once. 4. Wait several hours to see whether ice production restarts, and note whether 15-8-00 comes back on the display.

! Why to stop there

The relay is part of the control board, which carries line voltage
Telling a board relay from a harness plug takes a meter
Replacing the ice maker will not fix a relay that never sends power

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

15-8-0015-8-00 questions

Why is my ice maker not working when the refrigerator cools fine?

With 15-8-00 the relay that feeds the ice maker is stuck open. Cooling uses other relays on the board, so it keeps running. Only ice production stops, and the bin slowly empties.

Should I replace the ice maker?

Not for this code. The ice maker is not receiving power from the board. A new ice maker would sit idle the same way. We test the relay and the plug first.

How long until I have ice again?

After the repair the ice maker usually starts a cycle within a few hours, and a full bin takes about a day. You get a written price before we start.