How to fix Ideal Vogue Max fault code E370

What does the Ideal Vogue Max E370 fault code mean?

The E370 fault code on the Ideal Vogue Max indicates a problem with the domestic hot water (DHW) heat exchanger. This fault typically suggests that the heat exchanger is blocked or has developed a leak, affecting the boiler’s ability to provide hot water.

Common Causes

  • Blockage in the heat exchanger: Debris or limescale buildup can restrict water flow, leading to overheating and faults.
  • Leak in the heat exchanger: A physical failure in the heat exchanger can cause water to escape, resulting in a drop in pressure and functionality.

Can I fix it myself? (DIY)

It is strongly advised to call a Gas Safe Engineer for this issue, as working on the heat exchanger involves gas and electrical components that require professional handling for safety and compliance.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for fixing the E370 fault could range from £300 to £600, depending on whether the heat exchanger needs cleaning or replacement. Replacement parts and labour for a qualified engineer contribute to this cost.