A fresh article with something new to troubleshoot. This time I will repair a tower rail that belongs to my father. It is an Airelec Indigo model, also sold under the Noirot brand.
This heater has two functions. A heating mode with a single heating element and a “forced operation” mode that allows you to quickly heat the bathroom before taking a shower. In the last mode, the heater enables a second heating element coupled with a fan.
This device works perfectly in simple heating mode, but when I enable the “forced operation” mode, the fan starts for a brief amount of time, then turns off, then turns on again for two seconds and so on. After several minutes of on-off cycles, the fan works continuously. At first glance, it looks like a power supply or a chip reset issue.