Repairing Herrmann Wärmesysteme Concorde S

When we bought our house, it had a nice heating system that produced heat not only from gas, but also from solar energy and – via a heat exchanger in the chimney – from solid fuels. When a heating system suddenly breaks down, good advice is hard to come by – especially if it’s a boiler from a manufacturer that hasn’t been on the market for several years. Missing or prohibitively expensive spare parts, no official service hotline, and hardly any up-to-date documentation create particular challenges. However, this doesn’t necessarily mean the end for the system.

1 The fault

A few years later when winter began the heater ran into error as the movie shows…

2 The problem

The manufactor Herrmann Wärmesysteme does not exist anymore. I found only one heating engineer who offers service for this heating. But calling them was very depressing…

3 The solution

The only useful post I found was in mikrocontroller.net-Forum. The solution really was replacing the broken capacitor. The spare part was about 1 €! Mine was a radial capacitor, 50V, 220µF. After changing it the module ran without any errors.

All my concorde’s modules have a similar pcb and all of them have that capacitor. Probably I will replace the others too. Will see.