Question about Honeywell Programmable Thermostat Heater

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Require room thermostat for ferroli combi boiler optimax 25c . I have a honeywell at the moment which stopped working. it has two wires coming into it from the boiler

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Get a Ferroli wireless programmable room stat. City plumbing supplies can get hold of them but you'd be looking at approx £130. Part number 30800009. No wiring involved, the receiver connects to the boiler pcb. Had same problem but now fine.

Posted on Mar 12, 2009

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Almost any thermostat you install will have the 2 wires that you are looking at It depends on how in depth you want to get with your thermostat. Home depot will have what you need. I hope this helps. Don't forget to rate my answer.

Posted on Feb 18, 2009

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Ferroli boiler optimax he 38 c.Powers up ok,no hot water,no error code.Think its an ignition problem.Heating flame not showing?????


Is there an error code? If not the flow sensor for the hot water could be faulty. Also if you've had a power cut depending which model of Optimax HE you have, you sometimes have to tell the boiler it's a Combi, as they have a generic Pcb fitted which is also used on the system only boilers.

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Can't help you directly, but Honeywell will have user instructions on their website.
It's something like holding the 'stat within a metre of the boiler when the batteries are inserted. Best to RTFI.

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Fault code f26 ferroli optimax 25c how to reset


There is a parameter on the pcb to change would take 30seconds to do. Never replace ur pcb for these faults. Hold down reset untill u see t5 press reset 1 more time it will then say p01 press the heating temp button until u see p02 press the hot water temp button until it changes to numberv2 and that will fix ur problem

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Fault code ( nocn ) on a ferroli boiler


if nocn is on the time clock then check the wiring to time clock and if all good then it is the time clock at fault and will need repleacing

Apr 25, 2010 | Heating & Cooling

1 Answer

Optimax 25c ferroli, central heating!!!!!!!!!!!help!!!!!


there should be a perm on setting on the system so instead of running it on timed mode switch it to on there is also a boost wich usually give 1 hour of heating

Mar 21, 2009 | Honeywell Programmable Thermostat Heater

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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