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Joined 2 years ago
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Cake day: October 4th, 2023

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  • Just as a clarifying point(I’m sure some HVAC person can correct me). The fan spins up to make a draft, the pressure sensor is detecting negative pressure(vacuum) and that successful check allows the gas valve to open prior to the igniter/flame sensor. The draft helps pull the gas into the combustion chamber and not just leak it out into the basement or wherever(especially if it fails to ignite). Furnaces kicking on are a series of do an action, verify that action happened, repeat until it gets through its todo list. High efficiency furnaces work similarly but also different…

    Knowing the general boot up can help figure out what isn’t working. Igniter never goes off?…pressure sensor is right before it. Furnace ignites but shuts off a few seconds later…Flame sensor didn’t report success.

    I keep a pressure sensor, igniter, and flame sensor sitting next to my furnace. It’s like ~$50 for the OEM parts and I can generally fix my furnace in 5-10 minutes.


  • If the AI determines you’re impaired (blood alcohol ≥0.08% or showing fatigue), it can prevent ignition startup or limit vehicle speed.

    That should go well for my drives across -20F(-30C) degree areas. That first option could literally get someone killed at worst or cause some interesting problems at best. You’re tired and want to fill up before heading to the hotel? Now you’re stuck at the gas pump.

    False positives are going to be rampant. I remember the face tracking cameras that didn’t work at all for anybody that wasn’t Caucasian. I’d imagine there is going to be tons of lawsuits from accessibility groups when it misidentifies perfectly alert people due to some abnormality.