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Error code · Wine Storage

Sub-Zero Designer Wine (IW) Code 15-C-01: condenser fan relay stuck on

Code 15-C-01 on a legacy Sub-Zero Designer Wine (IW) unit, for example an IW-30R or IW-18, means the AC condenser fan relay is stuck closed. The relay should switch the condenser fan off when the compressor…

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Code
15-C-01
Appliance
Wine Storage
Brand
Sub-Zero
Warranty
30-day workmanship

What 15-C-01 means

Code 15-C-01 on a legacy Sub-Zero Designer Wine (IW) unit, for example an IW-30R or IW-18, means the AC condenser fan relay is stuck closed. The relay should switch the condenser fan off when the compressor rests; instead it keeps the fan powered all the time. Cooling usually continues, but the fan runs nonstop, you may hear constant airflow at the grille, and the display shows 15 C 01.

Common causes of 15-C-01

  • Condenser fan relay contacts stuck together
  • A control board holding the fan relay energized
  • A wiring short feeding the fan directly
✓ One safe check you can try

1. Make sure the grille is clean and unobstructed. 2. Note whether the fan noise ever stops. 3. Cut power at the breaker for a minute and turn it back on. 4. Book a technician if the code reappears. 5. Leave the area around the toe kick open so warm air can escape while the fan keeps running.

! Why to stop there
  • The relay is on a line-voltage board inside the unit
  • Constant fan operation wears the fan motor
  • Diagnosis needs the board powered and measured
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.
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Other Wine Storage codes

45-2-00Sub-Zero Designer Wine (IW) Code 45-2-00: zone 2 lights not drawing power 45-2-01Sub-Zero Designer Wine (IW) Code 45-2-01: zone 2 light short circuit 90-5-80Sub-Zero Designer Wine (IW) Code 90-5-80: keypad module not talking to the control 90-H-80Sub-Zero Designer Wine (IW) Code 90-H-80: no communication with the high-voltage micro 90-H-82Sub-Zero Designer Wine (IW) Code 90-H-82: partial communication with the CCM 90-H-83Sub-Zero Designer Wine (IW) Code 90-H-83: bad data from the high voltage micro 90-H-84Sub-Zero Designer Wine (IW) Code 90-H-84: high voltage micro failed to initialize 95-1-00Sub-Zero Designer Wine (IW) Code 95-1-00: zone 1 door open too long
15-C-0115-C-01 questions
Is 15-C-01 urgent?

Less urgent than a code that stops cooling, since the fan runs too much rather than too little. Still, nonstop running wears the fan, so plan service in the near term.

Why is the fan noise constant?

The fan relay will not open, so the condenser fan never gets the signal to stop. The constant hum at the grille is the direct result.

What fixes it?

Replacing the stuck relay or the board that drives it, depending on what testing shows. You approve a written price first, and our workmanship is covered for 30 days.

Book a visit

Still seeing 15-C-01?

A technician diagnoses it on site and gives you the price in writing before any work starts.

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