Sub-Zero Designer Code 35-A-00: Air filter fan open

What 35-A-00 means

Designer integrated columns like the DET3050CI and DEC3050R use 35-A-00 when the air filter fan circuit is open. On these models the fan moves cabinet air through the air purification cartridge. With the circuit open, the control cannot run the fan, so air cleaning stops even with a fresh cartridge installed. Cooling usually continues as normal, but odors from strong foods may linger longer and ethylene from produce is no longer filtered.

Common causes of 35-A-00

Air filter fan motor open
Connector at the air filter fan loose
Broken wire to the fan

✓ One safe check you can try

1. Remove the air purification cartridge, check it for damage, and reseat it firmly. 2. Close the door, wait a minute, then open it and listen near the filter housing for fan sound. 3. Keep strong foods covered to limit odors in the meantime. 4. Schedule service if the code comes back.

! Why to stop there

The fan is mounted behind the filter housing.
Testing an open motor requires a meter.
Parts must match Designer specifications.

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-A-0035-A-00 questions

Does 35-A-00 affect temperatures?

No. It covers the air filter fan only, which handles air purification, not cooling. The compressor and evaporator fans keep holding your set temperatures while the code is active.

Should I replace the cartridge?

A new cartridge is fine if the old one is due, but it will not fix an open fan circuit. The fan has to run for any cartridge to do its job.

How is the fan repaired?

We test the fan motor and its connector inside the filter housing, then replace the part that failed. You get a written price before work, and our 30-day workmanship warranty covers it.