Because my son-in-law Jeff is religious, and did such an excellent job helping to prepare our new house in Beer-Sheva, I believe everything he tells me. When he told me that the red switch with a light inside, that was outside the bathroom in our bedroom, was the power for the water heater I naturally believed him. There was also a similar switch in the corridor, but this one had a fancy timer attached to it, and he did not know what that was for. So when the skies started to be cloudy and the temperature started to fall and the solar heater would not work so well, I turned on the switch for the water heater when I got up early (say 6 am) and then turned it off an hour later. Fortunately the water was always hot. But, I was warned not to leave it on for too long, say 2 hrs max, since it could blow the boiler.
I had an electrician here doing some work for me, and I asked him what did he think the switch in the corridor with the timer was for, and he said that’s for the hot water heater. So I asked him what was the other switch outside the bathroom inside our bedroom and he said that was for the bathroom heater (which he then set up). So I felt foolish, here I was switching that switch on and off on the assumption that it was heating the water and actually it was doing nothing,
So now I decided to test the actual water heater switch. I turned it on and set the timer to the correct time, and set it to turn on for an hour 6-7 am. The light was on in the switch but also a small light lit up on the side. I showed the timer to our metapelet and she assured me that it was set up correctly. But, just in case I took a photo of the set-up and sent it to Jeff, who I always believe. Two hours later he called me back and said “do you know you’ve turned the water heater on,” I replied yes, but its on the timer. “No” he said “its on all the time when the little light on the side is on.” Oh I said, that means its been on for 2 hours. He said you might want to turn it off now. He explained that there was a switch in the timer (that I had seen but had no idea what it was for) that allowed you to turn it on all the time or off all the time, or if you set it to the tiny clock shown in the middle of the switch, that actuated the timer.
The first thing I did was turn the whole thing off. Then I let the water run and it was scalding hot, obviously too hot. I let it run to make sure that if it heated again the boiler would not burst. Near catastrophe! Then the next day when it had cooled down I reset the clock and put the little switch onto the timer setting and then turned it on. I ran it thru 24 hrs by hand to check that it turned on and off (as indicated by the little light on the side) when it reached 6 and 7 am, and then satisfied, I set it to run continuously.
Now every morning we have hot water without the sunshine because the water is heated for one hour. The moral of this story is don’t believe everything a religious person tells you.