Visible scorching on a PCB - anxiety about future risk

[Joan]

Hi

I had a plumber around for a F28 error on my Valliant ecotec today. He said that as well as there being a faulty valve that needs replacing, the PCB is scorched with an electrical burning smell. He wants to replace both parts which sounds fair enough though super expensive. My question is this. I suffer from quite serious anxiety and it really concerns me that there has been burning in my boiler. Is this something that happens frequently? Could this not cause my whole flat to burn down? I am worried about this even with a replacement PCB because he said it had happened a few times from the look of it so have there been mini risky situations putting me and my loved ones at risk?

Thank you for any help.

 

[ShaunCorbs]

I’ve never had a pcb on fire so your ok

And these days with electrics as they are it would trip off if anything went that bad

 

[rpm]

PCB`s often are black in places however claiming it to have a electrical burning smell is a dodgy claim to make, how well do you know this guy?

 

[Burger]

Changed a lot of Vaillant PCBs (well over 40), only ones that have got wet have made a crackling and a small bang, none have had scorching/burning smell.

 

[Chuck]

The PCBs and components used by reputable manufacturers are fire-retardant so the risk of fire is insignificant.

It's not uncommon for faults in PCBs to result in scorching associated with arcing, particularly if the conductor is supplying an inductive load.

 

[king of pipes]

I have changed a few in my time on valliants often there has been a scorching on the board , the last one I did the gas valve needed changing aswell , the digital display on the boiler was erratic and would eventually lead to the boiler going to a f fault , if your GSI is charging you more than £500 then I would advise you go with a one off repair with valliant they offer a repair service and are often cheaper than us because they have access to the full range of spares at cost. Kop

 

[Millsy 82]

You may need the lead as well. I'm assuming its gas valve has gone and taken pcb out?

Dont get vaillant out use your local gas engineer. Vaillant massively overcharge on their parts and now offer a fixed price repair use your local engineer or lose them.