Ferroli Optimax HE 31 - Fault on new boiler

[dleader]

Hi Folks, I've just installed a Ferroli Optimax HE 31 initially it seemed to be working fine but now (2 days later) it has started playing up. Works OK on CH mode but when it switches to DHW the water is hot and flows fine but then when the tap is turned off it goes to D1 for 2 minute (which is correct) but then when the boiler restarts the temperature rises very rapidly there is a bit of a bang and then fault code A03 appears. Resetting the boiler works and the CH comes back on, until the hot water is used again. I'm wondering if the diverter valve is sticking in DHW mode causing the system to overheat. Anyone got any other ideas.

thanks

David

 

[141bernard]

A03 is overheating, Check sensors, pump and if not bypass, also check boiler set up max power & min power, sounds like your new boiler is full of sludge, check C02 reading with an analyzer for some reason these boilers have high co2 readings although they are factory set. I always check the co2 on the optimax and nearly always have to adjust.

 

[Werthers]

Hi did you find out what the problem was? I've got exactly the same problem.

Being an installer I'm not too hot on diagnostics.

 

[GrahamM]

Firstly check pump operation, check for any air in system or circulation issues.
Then look at the more probable fault, as with all these junk boilers is sensor/switch failure.

 

[Seancoyne2000]

Viva Ferroli. The future of the industry. Cheap,reliable,value for money, five yrs warranty,super back up warranty even more superer tech call center help. :svengo:

If you believe that you'll believe the my farts smell of Old Spice. Old Spice the scent for real men.

 

[nickhammertime]

ferroli he 31c is coming up a1 can any one help ?

 

[Dotty]

You need a gsr in to look at your boiler. We cannot and will not give advice on the installation or repair of boilers for your own safety.

Please go to Gas Safe Register | Ensure your gas engineer is registered. or post a thread in the 'I'm looking for a plumber / gas engineer' section of these forums remembering to include your location. [DLMURL="http://www.ukplumbersforums.co.uk/im-looking-plumber-gas-engineer/"]I'm looking for a Plumber or Gas Engineer[/DLMURL]

If you are gsr please increase your post count to 10+ then send a pm to either Gas man or Redsaw who will then check you and then give you access to the gsr private forum.

Thank you.

http://www.ukplumbersforums.co.uk/central-heating-forum/42241-notice-gas-safety-related-advice.html

 

[Dotty]

Actually. Being as it's in here I'll open it again...

 

[plumber0808]

How has a non GSR posted in the private section?

 

[dancinplumba]

What's more can non GSR's see all posts and threads ??

 

[Dotty]

I moved it into here and no they can't. They get a permission denied message.

 

[dancinplumba]

Thank you Croppie 🙂