Sub-Zero Designer Code 35-2-00: open circuit on the Zone 2 fan

What 35-2-00 means

Sub-Zero Designer refrigeration such as the DET3050CI shows 35-2-00 when Zone 2 reads open in the fan code family, meaning the board finds no complete circuit to the Zone 2 evaporator fan. That fan moves chilled air across the second compartment. When it stops, cold builds at the coil but does not spread, so Zone 2 starts warming and frost can form behind its panel.

Common causes of 35-2-00

A Zone 2 fan plug that has come loose
Fan wiring broken behind the panel
A Zone 2 evaporator fan motor that has opened
A missing output from the board

✓ One safe check you can try

1. Check Zone 2 with a thermometer. 2. Listen for the fan with the door open and the switch held in. 3. Keep vents clear of food. 4. Reset the breaker one time. 5. If temperatures climb, move items to a cooler before we arrive.

! Why to stop there

The fan and plug are behind the Zone 2 evaporator cover
Ice may need melting before the fan can be reached
Circuit testing is done with power on

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

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 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

35-2-0035-2-00 questions

What does Zone 2 mean on my Designer?

Designer models number their compartments, and Zone 2 is the second one, with its own evaporator fan moving air across it. 35-2-00 says that fan's circuit is open.

Will Zone 1 keep working?

Usually yes, since each zone has its own fan. Only Zone 2 loses airflow, so move sensitive items out of Zone 2 if the thermometer there starts climbing.

How do you fix an open fan circuit?

We test the plug, the harness and the motor in that order, then repair or replace the open part. You approve a written price, and labor is covered for 30 days.