Cold weather and boiler

[vespagts]

Has anyone come across a boiler failing to fire up and giving a fault code when the weather gets colder.
I remember phoning the helpline of my electric garage door because it was very cold and no response from remote. He said he'd had loads of calls today with same problem, it's the electronic components faling in cold weather. Everything was fine when it warmer up.
Had the same with car radio once.
My boiler works fine until weather gets colder, then it fails to fire up then flashes F23, I have to reset then ok. Could it be the electronics faling when it's cold?

 

[Fred Blogs]

I suppose it could be although electronic compoents usually fail with heat. My boiler failed twice during the two very very very brief hot spells we had this year. I asked my son in law to have a look, yes he is gr incase the usual crowd come in mob handed, but he couldn't find anything out of the ordinary. Of course it was working fine when he looked and it hasn't failed since.

 

[vespagts]

My boiler is in our garage, thinking of building an insulated cupboard for it with air flow and ventilation, what do you think?
We had the problem all last winter, 3 gas people couldn't fix it, ok when warmer up, ok since last Feb

 

[Harry Bloomfield]

Has anyone come across a boiler failing to fire up and giving a fault code when the weather gets colder.

Electronics can fail when both hot, and when cold. A standard piece of diagnostic kit, is a bottle of freezer spray, to spray pcb's and the components on the pcb, to try to cause such faults to appear on demand.

If that's a Vaillant boiler, they (like many modern boilers), include frost protection of the boiler. If the boiler temperature falls, the boiler lights up and runs, to keep it from freezing. One of the settings in the menu, sets the temperature at which this happens - you might try increasing that set temperature, as a fix..