Sub-Zero Designer Code 35-2-34: Zone 2 fan running faster than set

What 35-2-34 means

With a Designer DET/DEC unit, the DET3050CI among them, 35-2-34 indicates the Zone 2 speed setting is too high. The Zone 2 evaporator fan is turning faster than the board asked for. A blade that has slipped on its shaft, a missing blade, or a motor that does not suit the control can all produce this. The zone often keeps its temperature, but a louder or different fan sound from the back wall is common.

Common causes of 35-2-34

A Zone 2 fan blade loose on the shaft or missing
A fan motor not matched to the board
An incorrect control signal to the fan

✓ One safe check you can try

1. Listen near the Zone 2 back wall for a change in fan sound. 2. Check for rattling with the door open and the switch pressed. 3. Reset the breaker once. 4. Confirm Zone 2 temperature with a thermometer placed on a middle shelf for a few hours.

! Why to stop there

The fan is behind the Zone 2 evaporator cover
A loose blade can strike the housing while running
Mismatched replacement parts can set the code again

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

35-2-3435-2-34 questions

Why did 35-2-34 appear after another repair?

If the Zone 2 fan or board was replaced recently, a part that does not match can run the fan too fast. Let us know the repair history when you call.

Can a fan blade come loose?

Yes. Without its blade, or with one slipping, the motor spins freely and faster than commanded. That is the first thing we check for this code.

Is food at risk?

Usually not right away, because the fan still moves some air. We suggest a visit within a week. We provide a written price before work begins.