How to fix Ideal Vogue Max fault code E320

What does the Ideal Vogue Max E320 fault code mean?

The E320 fault code on the Ideal Vogue Max indicates a domestic hot water (DHW) flow fault, which means the boiler is unable to detect the required flow of water for heating. This can lead to insufficient hot water supply for taps and showers.

Common Causes

  • Blocked DHW Flow Sensor: A blockage in the flow sensor can prevent accurate readings, causing the boiler to shut down the hot water supply.
  • Faulty Diverter Valve: If the diverter valve is stuck or malfunctioning, it may not direct water correctly between the heating and hot water systems.

Can I fix it myself? (DIY)

It is recommended to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that require professional handling. Attempting to fix it yourself could pose safety risks.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for resolving the E320 fault could be around £150 to £250, depending on whether the flow sensor or diverter valve needs replacement. This estimate includes parts and labour for a qualified engineer.