I have a lever tap fitted to one of the sinks in my property; up/down controls the speed of the water flow, and left/right the temperature - further left is hotter, and right is cooler.
I've noticed that the slower the water flow coming out of the tap (i.e. when the lever is only slightly pushed up) that the temperature of the water seems to be much hotter than when the lever is pushed all the way up - this is observed even when the lever is in the middle position. Is this by design for most of these lever-style taps? My assumption is that the tap is only releasing hot water when the lever is only slightly pushed up, but then introduces cold into the mix the further up it is pushed.