A Potterton boiler showing an E168 fault has detected a problem and gone into lockout. The code can be linked to an earlier fault, an unstable power supply or a problem with an internal component.
You can try a safe reset and check that the boiler has power. If the E168 fault returns, the underlying cause will need professional diagnosis.
- Content Guide
- » What Is the Potterton E168 Fault?
- » What Causes a Potterton E168 Fault?
- - Ignition or Flame Detection Failure
- - Unstable Electrical Supply
- - Faulty Printed Circuit Board
- - Internal Component Failure
- » How to Troubleshoot a Potterton E168 Fault
- - Reset Your Boiler Once
- - Check for Other Fault Codes
- - Check the Power Supply
- - Call a Gas Safe Engineer
- » Need Potterton Boiler Repair in London?
- » How to Help Prevent Boiler Faults
- » Frequently Asked Questions
- » Get Your Potterton Boiler Fixed
What Is the Potterton E168 Fault?
The Potterton E168 fault code indicates a general fault within the boiler system. It can appear when the boiler has failed to resolve another issue or after an interruption or fluctuation in the electrical supply.
The boiler may enter lockout to prevent further damage or unsafe operation. This fault can occur across the Potterton range; the exact models affected should be confirmed before this claim is made more specific.
Because E168 can have different underlying causes, resetting the boiler does not necessarily fix the original problem. For other Potterton fault codes, see our guide to Potterton boiler fault codes
What Causes a Potterton E168 Fault?
Several problems can trigger an E168 fault. Some may clear after a reset, while others require diagnosis by a qualified engineer.
Ignition or Flame Detection Failure
The boiler needs to ignite correctly and confirm that a stable flame is present. If ignition or flame detection fails, the boiler can lock out. Possible causes include a dirty or faulty flame sensor, a damaged or incorrectly positioned ignition electrode, or a problem with the gas valve.
Unstable Electrical Supply
An interruption or fluctuation in the mains supply can cause the E168 code to appear. This could follow a power cut or result from an electrical problem affecting the boiler. If the fault continues after power has been restored, the boiler may need further investigation.
Faulty Printed Circuit Board
The printed circuit board (PCB) controls and coordinates many of the boiler's components. A PCB fault can result in incorrect signals and error codes, including E168. PCB faults require diagnosis and, where necessary, replacement by a qualified engineer.
Internal Component Failure
E168 can also be a symptom of a problem with another internal boiler component. Potential causes include a faulty gas valve preventing gas from reaching the burner, a malfunctioning fan affecting safe flue-gas removal, or a failing pump causing circulation problems and potentially overheating.
The underlying fault needs to be identified rather than repeatedly resetting the boiler.
How to Troubleshoot a Potterton E168 Fault
Reset Your Boiler Once
Follow the reset procedure in your Potterton boiler's instructions. A reset can sometimes clear a temporary fault, particularly after a brief power interruption. If the boiler starts normally and the E168 code does not return, you may not need further action immediately. If E168 comes back, avoid repeatedly resetting the boiler — the underlying fault needs to be investigated.
Check for Other Fault Codes
E168 can appear alongside or after another boiler fault. If you saw a different code before E168 appeared, make a note of it. E119 and E133 are examples of faults that may appear before E168. If another fault code was present, that issue may need to be addressed first.
Check the Power Supply
Make sure the boiler is receiving power and check your home's fuse box for a tripped switch. If there has been a recent power cut, a reset may clear the E168 code. If the fault remains, there could be an electrical problem that needs professional investigation. Do not remove the boiler casing or attempt to work on its internal wiring yourself.
Call a Gas Safe Engineer
If the E168 fault returns after a reset, arrange an inspection by a qualified Gas Safe engineer. Do not open the boiler casing or attempt to repair internal components yourself. An engineer can check the electrical supply and investigate components such as the flame sensor, ignition electrode, PCB, gas valve, fan and pump.
Need Potterton Boiler Repair in London?
A recurring E168 fault usually needs more than another reset. Serviceteam's Gas Safe-registered engineers can diagnose and repair Potterton boiler faults for homeowners and landlords across London. If your boiler continues to show E168, you can arrange boiler repair in London.
How to Help Prevent Boiler Faults
Regular boiler servicing can help identify developing problems before they result in a breakdown. An annual service allows a qualified engineer to check the boiler's condition, clean relevant components and identify potential issues. This can help keep the boiler operating safely and efficiently.
Frequently Asked Questions
What Is the E168 Code on a Potterton Boiler?E168 indicates a general boiler fault and can put the boiler into lockout. The underlying cause may relate to ignition or flame detection, the electrical supply or an internal component.
Can Low Boiler Pressure Cause an E168 Fault?Low pressure can cause separate boiler faults and may be associated with another fault code appearing before E168. If your boiler pressure keeps falling, the underlying cause should be investigated rather than repeatedly topping it up.
Can I Fix a Potterton E168 Fault Myself?You can safely try the manufacturer's reset procedure and check that the boiler has power. Do not open the boiler casing or attempt to repair internal electrical, gas or mechanical components yourself. If E168 returns after a reset, contact a Gas Safe engineer.
Get Your Potterton Boiler Fixed
If your Potterton boiler continues to show an E168 fault, don't keep resetting it. Contact Serviceteam to arrange a professional diagnosis and repair.
