The answer to 'smoke detector gets hot' is that a smoke detector getting hot is usually a sign of an underlying issue that requires attention. This can be caused by a problem with the electrical wiring, the smoke detector itself, or other factors in the home's electrical system.
Common causes include a faulty or overloaded circuit, a malfunctioning smoke detector, or a problem with the home's wiring. Symptoms may include the smoke detector feeling hot to the touch, unusual odors, or even smoke or flames coming from the device. In these cases, it's important to address the issue promptly to prevent potential fire hazards or other safety risks.