Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws

Install the app
How to install the app on iOS

Follow along with the video below to see how to install our site as a web app on your home screen.

Note: This feature may not be available in some browsers.

M

MarkP80

Hi everyone,
This is my first post on the forum, so hello to all. I hope someone can maybe help with a problem I am having with my Ferroli Maxima 35S boiler.
I had an initial fault code relating to the boiler not lighting. I called my plumber who came out and found that the wire to the flame (ionising) sensor was heat damaged, with very brittle insulation. It looked as if this had been shorting against the case, hence no signal from the sensor. He replaced this, and also the ignition lead which also had brittle insulation. The boiler is about 4 years old.
A few days after the repair, the boiler failed again, this time with a flue gas sensor fault. He came back and took the cover off again to find the wire from the flue temperature sensor was also damaged. Surprisingly though, the insulation on the new flame sensor was damaged again.
There are a few other wires that run through this casing, but all look ok.
My plumber rang Ferroli but they were no help really. What was a concern was that they advised that they had discontinued supplying wiring spares for this boiler, very disappointing with what I thought was a fairly new unit.
Anyway, does anyone have any ideas as to whether there may be some underlying problem here?
My plumber is still being very helpful with this, but I thought it would be useful to see if anyone here had any views or even experience of this issue.

Many thanks,
Mark
 
My guess is the burner/combustion seals are leaking, excessive heat melting cables, might need a new seal kit. Needs to be looked to asap, as if it is don't use the boiler till sorted.
 
Thanks for the replies guys.
Aggis, my plumber came and had another look. He did a temporary fix on the damaged sensor wire and ran the boiler with the cover off - there was indeed combustion gas leaking from the top seal of the combustion chamber. It wasn't easy to see where the leak was at first, but you could certainly feel it! As you suggested, it looks like this is what had caused the wires to fail. He's going to get the gasket and repair it for me. Once he found the leak he turned the boiler off and it is shut down until repaired.

Anz, I had a vague memory that there was such a law for car parts but I have no knowledge of what applies to boilers. If you do have a reference I'd be very interested in that.

Thanks again for the replies - what a good forum!

Cheers,
MarkP
 
Last edited by a moderator:

Official Sponsors of Plumbers Talk

Similar plumbing topics

We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.