What does the Chaffoteaux 7.iv fault code mean?

Your boiler is leaking internally between the heating and hot water systems, causing water to pour out of the safety pipe outside.

How much does it cost to fix Chaffoteaux error code 7.iv?

Typical repair cost for the Chaffoteaux 7.iv fault is £250-£450 including labour.

Safety valve discharges - Secondary heat exchanger (water to water) internal water leak

This is a emergency severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Six most common causes of dropping pressure.

Almost always a stuck diverter valve on combis.

Each noise points to a different fault.