Error Code
medium
Winterhalter UC Series – Wash Items Do Not Dry (Rinse Temperature Too Low)
On your WINTERHALTER UC Series unit, if wash items are not drying,…
Winterhalter UC Series - ERR 402: Must Be Repaired
Critical / Stop Operation
Warning: The information provided here is for educational purposes only.
Working with commercial kitchen equipment involves high voltage, gas, and high temperatures.
We strongly recommend contacting a certified service technician for any repairs.
We are not responsible for any damage or injuries resulting from DIY repair attempts.
This information is provided 'as is' without any guarantees of completeness or accuracy.
TLDR
On your UC Series unit, error code ERR 402 indicates a critical internal fault requiring immediate professional attention. The machine has detected a condition that prevents safe or proper operation and has entered a lockout state. This error typically signifies a major component failure or a safety circuit activation, making the unit inoperable until repaired by a qualified technician.
Technical Details
Repair Steps:
- Perform a Hard Reset:
Safely disconnect the machine from its main power supply for at least 5 minutes. This can sometimes clear transient electronic errors. Reconnect power and attempt to restart the machine.
- Verify Water Supply and Drainage:
Ensure that the main water supply valve to the dishwasher is fully open and that there is adequate water pressure. Check for any kinks or blockages in the water inlet hose. Also, inspect the drain hose for obstructions or improper routing that could prevent proper drainage, as these can sometimes trigger general system faults.
- Check for Visible Obstructions or Damage:
Carefully open the machine door and inspect the wash chamber, spray arms, and filters for any large food debris, foreign objects, or visible damage. While unlikely to directly cause ERR 402, sometimes physical obstructions can lead to other component failures that manifest as a general repair error.
- Listen for Unusual Noises or Odors:
If the machine attempts to start or shows any sign of activity, listen for any unusual grinding, buzzing, or clicking sounds. Also, be alert for any burning odors, which could indicate an electrical component failure. Such symptoms confirm an internal hardware issue.
- Contact a Certified WINTERHALTER Service Technician:
Since ERR 402 is a “machine must be repaired” code, it indicates a significant internal problem beyond basic user troubleshooting. Gather your machine’s model and serial number, the error code, and any observations (e.g., “no power,” “unusual noise”) and contact a certified WINTERHALTER service provider immediately for expert diagnosis and repair. Do not attempt further operation or extensive DIY repairs, as this could void warranties or cause further damage.
Common Questions:
Q: What does ERR 402 specifically mean on a WINTERHALTER UC Series?
A: ERR 402 is a general service message indicating a critical internal fault that requires professional repair. It means the machine has detected an issue preventing safe or proper operation, such as a major component failure, and has shut down.
Q: Can I clear the ERR 402 code myself?
A: While a hard reset (power cycling) might clear some minor transient errors, ERR 402 typically signifies a severe hardware problem that won’t be resolved by simple resets. It almost always requires a certified technician to diagnose and repair.
Q: Is it safe to continue using my WINTERHALTER UC Series with ERR 402?
A: No, it is not safe or advisable to continue using the machine when ERR 402 is displayed. The error code explicitly states “machine must be repaired” because a critical fault has occurred, potentially impacting safety or causing further damage. Immediately cease operation and contact a service technician.
When to call a technician
For this error, we recommend calling a certified technician. Do not continue operation or attempt repair yourself.
- Equipment shows a critical or stop-operation fault.
- You smell gas, burning, or see smoke or sparks.
- Error returns after following the steps above.
- You are not trained to work on this equipment.
- Warranty or safety could be affected by DIY repair.