Ariston HE 24 error code 604

Hello Guys,

I have bought an Ariston HE 24 boiler two years ago. Everything was working fine until last night. Now, the boiler is showing an error code 604 repeatedly even after restarting the boiler. I am unable to understand the hidden meaning behind this error code. Apparently, everything is looking good. Someone, please guide.

Regards

Luis

Hi, according to boiler’s user guide error code 604 means that your boiler has insufficient fan speed. Just like an out of order fan, having the fan, which is not working at the right speed, is very risky. Coming to the main issue, whenever an error code 604 appears on boiler’s control panel do take it seriously. Firstly, seek help from an expert boiler engineer in order to assess the loss. Secondly, if the boiler’s fan & other costly parts of the boiler need replacement then do it immediately to prevent further damage.