Tuesday, 21 August 2018

Ariston boiler error code 501

Ariston Clas 30HE – error codes SP SP SP 50 504. If your Ariston boiler is displaying SP, SPand SPerror codes please . I have an Ariston boiler model Clas 30HE, and it is getting a bit crazy during last weeks.

Boiler first shows SP then E5and it switches itself off. Error 5is no flame detectect after ignition attempts. My boiler does this as well and pressing the reset is usually enough to get things working again.


The boiler is not firing up to give neither hot water nor heating.

The Ariston range of boilers are normally extremely reliable. But in case things do go wrong, please find our handy table of all Ariston error codes. The code of practice for the installation, commissioning servicing.


These instructions are suitable for CLAS HE boilers. I try to reset the boiler to no avail, then a little fruitless. No Flame Detected” on these Ariston boilers.


Hi All, I had this boiler installed almost years ago. This won't be covered under warranty, especially with a manufacturer as awkward as Ariston. Apr 20- Are you struggling to diagnose a faulty Ariston boiler?

Fault 1: Ariston Microgenus code A– no ignition. May 20- I increased the water pressure then a fault 5appeared saying no flame detected. SOURCE: Ariston ACO MFFI Efault code present.

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