how do old electric wall heaters know when to turn on when you set the dial to a certain point?

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I’m pretty sure mine is possessed, because it starts to click on then shuts off and repeats a few times before turning on, and then does the same process sometimes when trying to shut back off. It just made me wonder, what mechanism inside of it is determining that it’s cold enough or warm enough in my living room that it needs to kick on or off.

In: Engineering

2 Answers

Anonymous 0 Comments

Old ones likely used a Bi-metal strip, it’s a strip of metal that changes shape when it is a certain temperature, and it’d break the circuit.
It’s not really looking at the actual room temp, just it’s own internals.

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