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Ferroli optimax 31c

Boiler fires up and temp at 82 degres d2 code appears but no heat to the rads

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Here is a link to the manual.It shows fault codes.
http://www.ferroli.co.uk/Product_Documentation/Domestic/Optimax_HE_31_C_Manual.pdf

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Posted on Jan 17, 2009

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The boiler is airlocked.

Posted on Jan 26, 2009


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Sticking diverter valve

Posted on Jun 28, 2009

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The heat is obviously not getting away from the boiler due to either a blockage or more likely a closed valve. check that the flow and return valves are opened as some people accidently turn the return off when putting pressure in the boiler. if these are open then it is likely that the diverter valve is sticking. you can sometimes get them going temporarily by stripping them down or a persuasive tap on the motor but will stick again. will need replacing if this is the case. i can get hold of the diverters if you require one so post a reply if you do and i will give you my details.

Posted on Feb 07, 2010

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I need ferroli optx 25 manuel please could anybody help thnks

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Room stat is not calling for heat on ferroli optimax 31c

Posted on Jul 19, 2009

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Boiler fires,,but no heat to the rads or water

Posted on Feb 11, 2009

  • michelle tyler Feb 11, 2009

    code d appears,noheat to rads or hot water

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1 Answer

Ferroli optimax he 31c. brand new system will only heat 3 of 8 rads. boiler on 90c will only burn for 15sec then D2 shows and it cuts out. Why??


it is either your pump is not running or blocked [ debris from installation ect ] or your diverter valve is stuck partially open allowing a little water to pass into the heating system [ usually first rads on system ] it runs for a short while and cuts out because your overheat stat is kicking in because of poor circulation [ it is only running around the primarys in the boiler where it quickly reaches the over heat limit ] temp tends to rise approx 1 deg per second a clear indication of circulation problems.
solution GET RID OF THE FERROLI

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Do you know where I could get the instructions for setting the clock timer on my optimax he 31c


I sent an e-mail to technical@ferroli.co.uk telling them that my Optimax HE 31 C
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You probably won't get a reply during the weekend though.

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Trevor

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2 Answers

Hi i have a ferroli optimax 31c , hot water works but my heating dont ,it comes on the the heat temp raises to its highiest then cuts of saying A3 AND D2 can you help please


hi had same problem engineer came out and the diverter valve was cloged up sorted it and recomended a system flush plus install a magnet clean whitch picks up debri be 4 it gets 2 the boiler.

Sep 26, 2010 | Quasar HQ2051TH Air Conditioner

1 Answer

Ferolli HE 31C fires up fine, hotwater works, but ...


diverter valve fault most likely. when you call for central heating do you get 3 swiggley lines coming off radiator symbol in the boiler display if you do and not getting central heating then definitely diverter fault

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Fault code ( nocn ) on a ferroli boiler


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I have just tried to run my ferroli optimax 31c boiler. The boiler fires up, but then displays a d2 message and the radiators do not heat up. Any ideas what causes this problem and how I can solve it...


D2 is not a fault what that means is delay and 2 refers to CH which means the boiler has gone into standby mode. you need to check that your CH circut is open, there is a filter on the return valve into boiler make sure this is not blocked. If this is blocked the water is just going though the boiler by-pass so then the boiler thinks its up to temp. hope this helps

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Problem with heating on ferroli optimax 31c


d2 is the code symbol for delay after central heating. and is not a fault code.. however if this is coming on then stopping the operation of the boiler then it usually points to a sticking diverter valve.

Mar 28, 2009 | Quasar HQ2051TH Air Conditioner

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