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Error code reference

Sub-Zero Refrigerator Error Code 15 1 01

Refrigerator Compressor Relay is stuck closed; power to compressor at all times.

Sub-Zero codesSub-Zero refrigerator codes
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What the 15 1 01 error code actually means

This error means your refrigerator's compressor is running constantly without shutting off, because the switch that normally controls it is stuck in the on position. Your refrigerator may be running too cold, making unusual noises, or consuming more electricity than normal. The control board, which manages that switch, is the likely cause and typically needs to be replaced.

Diagnostic procedure

The full 15 1 01 procedure

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First diagnostic step
Verify, replace control board.
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Most common causes of 15 1 01

Ranked by how often they cause this code
  1. 1Failed control board relay circuit
  2. 2Welded relay contacts on the control board
  3. 3Shorted relay coil or driver transistor
  4. 4Transient control board fault

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Questions people ask about 15 1 01

What does 15 1 01 mean on a Sub-Zero refrigerator?
Error code 15 1 01 means the refrigerator compressor relay is stuck in the closed position, causing the compressor to receive power continuously. The control board is unable to cycle the compressor off as it normally would during temperature regulation. This is a control board-level fault that requires diagnosis and typically board replacement to resolve.
Is it safe to keep using my Sub-Zero refrigerator with error code 15 1 01 active?
Continued operation with this fault is not recommended. A compressor running without shutting off generates excessive heat, accelerates wear, and can lead to compressor failure or food being over-chilled. It also increases energy consumption significantly. The refrigerator should be serviced promptly to prevent further damage.
How much does it cost to fix error code 15 1 01 on a Sub-Zero refrigerator?
Repair costs depend on the specific Sub-Zero model and local labor rates. Control board replacement on Sub-Zero refrigerators typically ranges from several hundred dollars to over a thousand dollars when factoring in the cost of the board and professional labor. Getting a quote from an authorized service provider before proceeding is advisable.
Can I fix error code 15 1 01 myself?
The primary fix for this code is replacing the control board, which requires disconnecting electrical components and working with line-voltage wiring. Technicians with appliance repair experience can perform this repair, but most homeowners should call a qualified service technician. Confirming the fault is active before ordering parts is an important first step.
Will resetting my Sub-Zero refrigerator clear error code 15 1 01?
A power cycle reset may temporarily clear the code, but if the relay circuit on the control board has physically failed, the fault will return quickly because the underlying hardware problem remains. If the code reappears after a reset, the control board should be inspected and replaced. Resetting the unit does not repair a stuck relay contact.

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