It does it in several ways. Cold water causes Grease and oils to thicken. All of the more efficient washing machines use smaller lower power motors with transmissions that are more heavily geared. When the grease thickens, it causes the motors to work harder, pulling more electric current, and cause issues with the electronic control boards primarily in the relays. Also, detergent does not dissolve well in cold water so there is more residue build up with in the machines, sometimes causing excessive corrosion to portions of the transmission/ agitator shafts which can cause seal failure. Also, what you are primarily trying to remove from clothing is body grease and oil. Think of it like a roasting pan when you cook a turkey. Do you wash it in cold water? of course not. The grease would congeal and be twice as hard to remove. In a cold water wash, the grease and body oil congeals and does not get broken down as well with the new enzyme based detergents because in cold water they freeze up and do not work. You end up with more residue, more build up and eventually more corrosion. This was the downfall of many a Front loader as well, Especially the Maytag Neptune.Can you go into details, why Cold Water will cut the lifetime of a washer? You stay it shortens the pump and the transmission? First time I ever heard this.