Vaillant cycling problem

I am occasionally emailed by people who have come across this blog, asking for any further news about resolving problems with repeated cycli...

The new circuit board continues to behave well, with no microfiring seen so far. I have found that its software has also been improved in ...

The new circuit board is progressing well. I have now found a way to persuade vrDialog to collect comprehensive data from it, which reveals ...

On a couple of mornings so far, since fitting of the prototype board, there has been a call for heat. Unfortunately vrDialog does not recogn...

Having given Vaillant over six months, in which time - as expected - I heard absolutely nothing from them, last week I sent a letter before ...

Last week I sent a short email to Vaillant asking for the contact details of its legal department, indicating that I intended to write a let...

On a slightly different topic, I've discovered a completely different sort of rapid cycling. The VRC430f includes an anti- Legionella ...