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Potterton · Error E154

Potterton E154 — what it means

Flow/return temperature test fault.

⚠ This is the likely cause from the code — a Gas Safe registered engineer confirms it on site. If you can smell gas, stop and ring 0800 111 999.

✅ Try these first — they're free

Often clears it without a callout:

  • Try resetting the boiler once (your manual shows how)
  • If the code comes straight back, it needs a Gas Safe engineer — don't open the boiler yourself

🔧 If that doesn't fix it

The likely cause is one of these — the engineer confirms which:

    Most likely part: Flow/return sensor

    What it costs
    Fixed price,
    no callout fee
    Free diagnosis first, then one fixed price for the repair — you only pay if you go ahead.
    A vetted Gas Safe engineer who covers your postcode will call you back to arrange the repair. No callout fee — you only pay if you go ahead.

    Other Potterton fault codes

    Potterton E09Gas valve wiring or connection fault.…Potterton E10Outdoor (external) sensor fault.…Potterton E109Poor circulation around the system.…Potterton E110The boiler has overheated and tripped — often a stuck pump o…
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