Sub-Zero Classic BI Code 35-R-34: Refrigerator fan shorted

What 35-R-34 means

With 35-R-34, a Classic built-in such as the BI-36U/S is reporting its refrigerator evaporator fan speed setting as too high, and the listing explains that as a shorted refrigerator evaporator fan. The fresh food fan stops circulating air, so the refrigerator warms while the freezer, cooled by its own system, keeps going. You may hear no fan noise in the fresh food section, even with the compressor running.

Common causes of 35-R-34

Shorted refrigerator evaporator fan
Pinched or chafed fan wiring
Moisture at the fan connector

✓ One safe check you can try

1. Move milk, meat and other perishables into a cooler with ice if the temperature climbs. 2. Keep the doors closed as much as you can. 3. Do not try to reach the fan or its wiring behind the panels. 4. Switch off the breaker only if you notice a hot smell.

! Why to stop there

A short at the fan can affect the board output.
The repair involves removing interior panels and covers.
The fan and harness should be inspected together.

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

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 deSub-Zero 600 and 700 Series Display de: Diagnostics enabled

35-R-3435-R-34 questions

How is this different from 35-R-33?

35-R-33 means the refrigerator evaporator fan is still turning, only slower than its setting. 35-R-34 means the control sees readings that point to a shorted fan, so the fan has usually stopped completely and the fresh food side warms faster.

Does the freezer still work?

Yes. On BI units the freezer has its own sealed system and its own evaporator fan, so it should keep holding temperature while the fresh food side warms. Use it to protect anything that can be frozen.

What will the repair cost?

We confirm the short, check the harness and the board output that feeds the fan, then quote in writing before starting. That repair is backed by our 30-day workmanship warranty.