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Repair guides and support for gas and electric hot water tanks, boilers and household heat exchangers.

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Ferroli Optimax HE 18S boiler. Error code T5.

Need help with Ferroli Optimax HE 18S boiler. Error code T5.

Have reset and got flashing P01 but nothing happens. Was working night before last. It was very cold overnight and last night wouldn't come on. Have tried to investigate this evening but all guidance says to reset and when P01 appears, system should fire up.

Nothing happening, house freezing, no other source of heating.

😢🥶

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T5 error code on a Ferroli optmax boiler typically means a problem with system pressure or fault. Try reset boiler hold down the reset button for 10 sec until display shows PO1 then press the rest button a second time .the system should try to restart.

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