Yesterday late afternoon/evening I inspected a house with gas, hot water boiler heating system of a modern design with electronic ignition (mfr date 1992), which did not start at all, though the unit appeared to have gas and electricity, and all the wiring from the thermostat (which was a simple, round thermostat with no switches, just a mercury bulb) to the boiler appeared fine.
The gas knob was on, the valve in the gas line was open, but nothing at all happened when I turned the thermostat up. No “bump” when the mercury hit the contacts, and no spark to the igniter. It was as if the power was off to the unit, but there appeared to be power to its circuit, and there was no switch on the unit or in the line, only a switched outlet on the junction box from which the power to the unit was run, which was on, and into which the cord for the automatic water level filling system was plugged. I turned the system off, and followed the lighting instructions, turning everything back on again, but again, nothing.
I told the client there appeared to be a problem with the electronic ignition system, but I’ll check it out, and if there’s something I missed, go back today to run the unit.
The property’s not far from where I live, and I’ve no inspections today, just the report from yesterday’s job to work on, so going back would be easy.
I could not find any sort of “reset” button or any such other feature along those lines. I know there was gas to the house, as the gas water heater was working, and the only gas valves I saw to the boiler were open. Can there be something I’m missing?