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Error code reference

Kenmore Dryer Error Code U-

Main PGM error.

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What the U- error code actually means

Your Kenmore dryer is showing a U- error, which means the main control board has run into a problem with its internal programming. Think of it like the dryer's computer experiencing a software crash. This may be a temporary glitch that clears after unplugging the dryer, but if it comes back, the control board itself may need to be replaced.

Diagnostic procedure

The full U- procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

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1
Confirm the fault
Power cycle the unit: switch off the breaker for 60 seconds, then restore power. If the code returns, the fault is persistent and the procedure below isolates the cause.
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Most common causes of U-

Ranked by how often they cause this code
  1. 1Main Control Board Failure
  2. 2Power Surge or Voltage Spike
  3. 3Temporary Firmware or Program Glitch
  4. 4Loose or Corroded Wiring Connections to Control Board
  5. 5Failed Board Component Such as Capacitor or Relay

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Questions people ask about U-

What does U- mean on a Kenmore dryer?
The U- error code on a Kenmore dryer indicates a Main PGM, or Main Program, error. This means the dryer's main control board has encountered an internal fault with its programming or processing logic. It can be caused by power surges, firmware glitches, or a failing control board. If a power reset does not clear it, the control board is the most likely component that needs attention.
Is it safe to use my Kenmore dryer when the U- error is showing?
It is not recommended to continue using the dryer while this error is active. A Main PGM error means the control board is not operating normally, which could result in unpredictable behavior during a cycle. Using the dryer in this state could pose a fire or electrical hazard, so the issue should be diagnosed and resolved before running another cycle.
Will resetting my Kenmore dryer clear the U- error code?
A power reset can clear the U- error if it was caused by a temporary firmware glitch or a momentary power disruption. To reset, unplug the dryer from the wall outlet and wait at least five minutes before restoring power. If the error returns after the reset, the underlying cause is likely a hardware failure on the main control board that will need to be addressed directly.
Can I fix the U- error on my Kenmore dryer myself?
Start by unplugging the dryer from its power source for at least five minutes, then plugging it back in to attempt a full reset. If the error clears and does not return, no further action may be needed. If the error persists, the fix typically involves inspecting wiring harness connections to the control board or replacing the control board itself, which is a moderately advanced repair.
How much does it cost to repair the U- error on a Kenmore dryer?
If a simple power reset resolves the error, there is no cost involved. If the main control board needs to be replaced, parts alone typically range from $100 to $300 depending on the model, with professional labor adding $75 to $150 or more. Inspecting and reseating wiring connections is a low-cost first step that may resolve the issue without parts.

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