Re: Win11 explorer bug?

On 12/12/2024 3:19 PM, Carlos E.R. wrote:

Over here, there is a safety "thing" (I don't know the name). When hot, it opens the gas valve, so that if the flame extinguishes, it goes cold, and closes the valve. It could be based on the Seebeck effect, so arguably electronics.
 I believe it is mandatory.

Furnaces have similar ELECTRICAL interlocks on the gas valve.
If "heat" isn't detected in a certain interval, the valve is
allowed to return to its nominal "closed" position.
But, as there is no heat initially, this has to be bypassed
for a certain "timeout" interval when initially starting the
furnace.
We had a failure in the gas supply to the city some years ago.
There was gas -- but of insufficient pressure/flow to keep
gas appliances operating correctly.  (It was unusually cold for
this region so gas demand exceeded supply capability)
This manifested as the thermostat calling for heat, the furnace
starting the purge fan, then opening the gas valve and firing the
igniter (all of these under software control)... only to have
the safeties kick in and shut down the gas supply when the desired
internal combustion chamber temperature was not reached.
Then, waiting a while before trying again.
Of course, if you WATCHED the process, you could see what was happening
and even "hear" the diminished flow of gas.
Folks lacking such skill swamped the local plumbers/HVAC guys
with complaints of "no heat" (Really?  You didn't think to ask
your NEIGHBOR if they had heat?  And, when they replied in the
negative, reason that it is unlikely to be a problem with YOUR
equipment??!)
[Of course, the plumbers/HVAC guys likely knew what the real problem
was but didn't turn away those requests for service!  :>  OTOH, if
they HAD and one of those folks had a real problem that led to a
"loss", they would likely have a hard time justifying their
inaction!]