I have a Tecnik TKD 795/3 Dishwasher that takes about 4.5 hours to finish its cycle whatever(45C or 65C) program is selected. I have cleaned the float chamber and ensured the waste pipes are clear. The filters inside the machine are also clear and the spray arm rotates when the machine is switched on. The machine only appears to get hot toward the end of the cycle but I am not sure if this is normal. Also the ‘Rinse’ cycle takes the specified 20 mins to complete OK. It is the two wash programmes (45C and 65C) that have the problem. Any ideas about what the problem may be?