I use Normal “Eco” on my Maytag mvwp575gw frequently...
I know this is a SQ thread but some of this may be helpful to you or to others who have a different washer.
My washer alternates between hot OR cold to fill the tub.
My plumbing had the old wheel turn-style knobs for the washer faucet outlets. I found it worthwhile to have them replaced with the new lever style. Then I added a brass Y (with NO levers) to the hot tap and tap cold. My Maytag washer is hooked up per instructions to one of the cold faucet outlets and one of the hot faucet outlets. I have a portable washer hooked up to the cold faucet outlet only. I have an extra washing machine hose hooked up to the extra tap hot faucet outlet. When not in use, I have a screw cap on it.
The Maytag has tap hot for the deep water cycles but adds cold to the Normal “hot” cycle to the point where it is barely warm at best. Unlike the SQ, the Normal “Eco” on this washer is also the ONLY smaller load size option.
For my Maytag, I have to start a Normal “Eco” cycle and then pause it. Turn off the hot water, unscrew the cap on the extra hose, turn hot water back on, add hot water as desired to the wash tub, turn off hot water, screw cap back on. turn hot water back on. Unpause washer. I added a waterproof piece of tape to mark the level of Normal fill. The washer will continue to fill if it is not at that level or will now start the wash cycle. If you cancel the cycle on this washer and start a new one, the tub will drain. [Note: If you use the Normal “Eco” cycle frequently, I think this would be a better option than unplugging and possibly messing up the computer board on that SQ.]
For the portable washer, I can just add the hot water before I ever turn it on. It won’t drain it out when I start a new cycle. [Not sure if this is the case for the SQ or not. Sounds like it is if one can cancel a cycle and then restart it with water already in the tub. If so, even better!]. If I have it connected to the sink, then I can control the temp that way. I use the sink sprayer hose to add more water to it to fill the tub 3/4 full. Otherwise, a large load only fill half the tub (what sense does that make?). I am fine with the rinses only being half a tub.
I find myself washing smaller loads now in the Maytag now. What I will probably do at some point is just connect a Y to the hot and cold faucet and to the cold inlet valve only and control the temp by adjusting the levers on the washer outlet box. The water temp on the washer is set to tap cold. I find warm works well for almost all the loads I do and I don’t worry about the energy costs for a warm spray rinse. For the occasional full tub or hot load, it would require more hands on as I would have to remember to adjust the levers again after the washer fills since I don’t want a hot rinse or even a full tub warm rinse (due to energy costs, which is why I don’t have it set that way now).
I am still trying to figure out the thermistor for this washer. It seems to come in play mostly for increasing the water temp to maintain a minimum wash temperature for any setting other than tap cold and to add cold water to the hot for the Normal “Eco” cycle. Relocating it to where it senses temperature works on in the Winter for me for the Normal “Eco” cycle so I can have a tap hot. During the summer, the incoming ground water is a higher temp than the threshold to get the hot water valve to even kick on. I also have my A/C set to around 80.
I have said this many times but these they need to go back to the drawing board on these energy guidelines. It is now it is taking more time, energy, chemicals, water, etc. to clean clothes. Also, these appliances are winding up in the landfills much sooner!
I have found that the spin dryer has made a noticeable difference on my electric bill as I have been able to use it for almost every load cutting drying time to 1/3 to 1/2 (I have an older dryer and prefer longer dry times to using higher heat for the load). Also, using a good ceiling fan and automatic circulations allows me to keep the A/C from kicking on as much.