Hot water system has been a bit iffy lately, but yesterday it didn't matter how much I pressed the reset buttons, it refused to fire up. Tested the thermostats with the multimeter, found the faulty one, but then lost power. A frantic assemble of a 200Ah Winston cell 12v battery and jumper leads and that got the inverter to stay on, the Full River batteries are door stops now days .... time for a scan and see if that came up with a reason why this wasn't a coincidence ..... bingo, one pair of thermostats is for the DC and gas, the other is for the electric and I must have touched the multimeter probes to the heater body by accident .... and that tripped the RCD at the power box next door

Fixed that, removed the two thermostats that control the gas and bridge the wires, and away it went. Set an alarm on the phone to turn the hot water switch off in 30 mins and we had hot water again. Dinner was ready about then, so the long awaited shower was postponed, the Margaret used the hot water to do the washing up and turned the hot water switch on again ...... and forgot about it

By the time I remembered, the water in the tank must have boiled, the safety valve dumped it all and put the gas out of action .... so it was a cold shower after all
Gunna see if I can get replacement thermostats from Jaycar and refit the control system .... the memory system failed real bad .....
T1 Terry