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Ferroli opimax he plus 31c boiler shows f40 as fault how do i repair

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Posted on Jan 02, 2017

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1 Answer

Hello! I've got a Ferroli Optimax HE Plus 31c boiler with the F37 fault flashing.


Try bleeding the air out of the rads then represure system

Sep 17, 2016 | Heating & Cooling

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

Dec 22, 2010 | Heating & Cooling

1 Answer

Fault code F5 & P10 on Ferroli opimax he 31c boiler


my air cond runs for 20 minutes than shows f5 and shut down compressor

Dec 02, 2010 | Heating & Cooling

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

Ferroli otc settings


this sounds like the boiler is in comfort mode press the eco/comfort button once and eco will be dispalyed on LCD. also check terminal 3 and 4 have no wires on the terminal strip as this is were the OTC is connected to boiler.

May 02, 2010 | Heating & Cooling

2 Answers

Why does my Ferroli HE31C keep switching off code A3.


Here you go, page 30, sounds like it's overheating, possibly a problem with the boiler stat or lack of circulation in the system. http://www.ferroli.co.uk/Product_Documentation/Domestic/Optimax_HE_31_C_Manual.pdf

Apr 06, 2010 | Water Heaters

1 Answer

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

Oct 07, 2009 | Comfort-Aire RAD-243 Air Conditioner

2 Answers

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

7 Answers

Ferroli optimax 31c


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

Please rate this solution.

Jan 16, 2009 | Heating & Cooling

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