in fact, in the latest versions of multi***********.. also have added the reset function of the prekat and the differential pressure sensor in case of replacement...Really when you replace the fap, you have to replace all the sensors and probes, and then do the reset of everything, especially that of the pressure sensor diffrenziata that is very important,this should be the correct procedure,then we, as usual, we try to save the customer is not thinking about that at the first inconvenience to take it in the c... us