# What is the code E168 on a Baxi Duo Tec boiler?

The E168 code on a Baxi Duo Tec boiler indicates a general electrical problem within the unit.

Understanding the E168 Error Code

When your Baxi Duo Tec boiler displays the E168 fault code, it's a broad signal that something is amiss with its electrical system. This isn't a specific component failure but rather a general alert that an electrical fault has been detected. This type of error can prevent the boiler from operating correctly, leading to a loss of heating and hot water.

Potential Causes of a General Electrical Problem (E168)

A "general electrical problem" can encompass a range of underlying issues. While only a qualified heating engineer can accurately diagnose the precise cause, common scenarios that could trigger an E168 fault include:

• Faulty or Damaged Wiring: Loose connections, frayed wires, or breaks in the internal electrical circuits can interrupt the boiler's power supply or control signals.
• Printed Circuit Board (PCB) Issues: The PCB is the 'brain' of the boiler, controlling all its electrical functions. A fault on the PCB, such as a short circuit or component failure, can manifest as a general electrical error.
• Component Malfunction: Key electrical components like the fan, pump, gas valve, or ignition electrodes might have internal electrical faults, leading the boiler to register a general electrical problem.
• Power Supply Instability: Inconsistent voltage, power surges, or an insufficient power supply to the boiler can trigger electrical errors.
• Sensor Faults: While many sensors have specific error codes, a general electrical issue could be related to a faulty sensor that is not communicating correctly with the PCB.
• Water Ingress: Any instance of water coming into contact with electrical components can cause short circuits and significant damage, leading to an E168 code.

What to Do When E168 Appears

If your Baxi Duo Tec boiler shows the E168 error, it's important to approach it safely and avoid attempting complex repairs yourself, as electrical work on boilers can be dangerous.

1. Perform a Simple Reset:
   • Locate the reset button or follow your boiler's manual for the reset procedure.
   • Turn off the boiler at the main power supply (e.g., at the fuse spur or main switch).
   • Wait for a few minutes (e.g., 5-10 minutes).
   • Turn the power back on and see if the E168 code clears.
   • If the code persists, do not repeatedly try to reset the boiler.
2. Check Power Supply:
   • Ensure the boiler is receiving power from the mains. Check if other electrical appliances in your home are working normally.
   • Verify that the fuse switch or plug socket supplying power to the boiler is fully on and functioning.

When to Call a Qualified Professional

For any persistent E168 error, or if you suspect an underlying electrical fault, it is crucial to contact a Gas Safe registered engineer (or equivalent certified professional in your region). They have the expertise and tools to:

• Safely diagnose the exact cause of the general electrical problem.
• Inspect internal wiring, connections, and key electrical components.
• Test the PCB for faults.
• Replace any faulty parts, ensuring the repair is carried out safely and to industry standards.

Summary of E168 Error on Baxi Duo Tec Boilers