Hello together and a happy new year! I have a problem with the Ommi (2.0 16 V, year 95`, climate). The heating is not really warm, or it is warm, then you turn on the fan, the temperature decreases again. All the signs that the water flow in the heat exchanger is too slow. I then saw that the underpressure hose was not connected to the heating valve, then the thing was quickly removed (my hands have 17 joints per finger) once again over the mudcuffs installed from the factory. Functional test passed, when sucking on the hose closed the part (or opened it on the right, depending on the way of viewing) After the installation still the problem, think of the heating cooler sitting on it, will wash it tomorrow. But now the heat test is passed, when sucking on the hose closed the part (or opened it on the right side of the tube). After the installation I have found a little bit of the tube.