I can appreciate all the above posts on this subject!
I love my old 1984 vintage Maytag A482, however it's one of those with a "cold only" rinse provision.
After attempting to locate a schematic for this specific machine, I'm going to inspect the control panel temp switch and associated wiring to see if I can over-ride the cold rinse with an optional warm setting, likely by installing a seperate toggle switch to parallel both water valves to give me a warm rinse option.
On occasion, I've done what member wayupnorth mentioned, by setting the machine to fill on warm wash, then when filled, going back to the rinse setting, and noticed an improvement.
But that takes time, waiting by the machine, so my modicfication is on my to-do list.