Water does not flow into the heat exchanger ⇐ Bosch

[fight back321]

Hello everyone, I recently encountered the following problem: PMM Bosch, the old heat exchanger was initially charging slowly, and in time it did not have time to build up before the electronics gave an error. In some places in the path of the water there was a coating of salt and I decided to remove everything and clean it. The next day, when I assembled everything, water did not flow into the heat exchanger at all, in order to exclude a number of reasons, I removed it, leaving only the water supply hose to see if water was coming out of the heat exchanger. Water did not get into it. I removed the hose, the water flows with good pressure, but it does not want to flow into the heat exchanger. Having removed the clamp from the hose, I checked that water was squealing with pressure from under the hose, which means there was a blockage somewhere inside the heat exchanger. Visually, it was possible to determine from the channels that the water was getting stuck somewhere on the bend (marked with an arrow). I poured detergent inside and left it soaked for a day, but the procedure did not produce results. Has anyone encountered a similar reason?