What does the Ideal Flow/Return Reversed fault code mean?

Your boiler has detected that your heating pipes have been connected the wrong way around, preventing it from heating your home properly.

How much does it cost to fix Ideal error code Flow/Return Reversed?

Typical repair cost for the Ideal Flow/Return Reversed fault is £150-300 including labour.

Manufacturer manual

Flow/Return Reversed

From this model's manual

Verified against the Ideal/Ideal Logic Max Heat installation & service manual.

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

Boiler cover options

A cover plan would handle faults like Flow/Return Reversed: no call-out fees, no surprise bills.

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Seeing a different code? Every code this model can display, in one place.

Almost always a stuck diverter valve on combis.

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.