The one minute setting at 5pm is only a safeguard, to turn the water heater off if someone is in during the day, and turns the heater on with the manual switch, and forgets to turn it off. If the heater is switched on it will stay on until the next programmed "off", which would be Sunday morning. The timer is in a convenient location, so if someone needs hot water during the week, they push the button, and the water is hot in about 15 minutes. So far it works very well!
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