wrote:
If the "cold" water is any warmer than cold tap water, then perhaps
Maytag has discovered a temperature that is warm enough to give better
cleaning performance, but cool enough to prevent damage.

According to the manual cold is 65F and warm is 105F. It doesn't say
what hot is, but I guess it is whatever comes out of the tap (Probably
around 130F depending on your water heater setting). These seem to
match the temperatures used for laundry symbols (See for example
http://www.textileaffairs.com/c-common.htm).

It does this by mixing hot and cold water. Some models have a heater
which would have another button under the temperature buttons.

The laundry guide that came with the machine states that cold tap water
is usually too cold to make detergent work properly.