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  2. Sail switch - Wikipedia

    en.wikipedia.org/wiki/Sail_switch

    A sail switch might be used to protect a fan forced pellet stove, central heating system, electric heating element from being energized before the air flow from the blower is established. [2] Sail switches might also be used to alarm if a ventilation fan in a hazardous location fails and air flow has stopped.

  3. Limit switch - Wikipedia

    en.wikipedia.org/wiki/Limit_switch

    A limit switch with a roller-lever operator; this is installed on a gate on a canal lock, and indicates the position of a gate to a control system A limit switch mounted on a moving part of a bridge In electrical engineering , a limit switch is a switch operated by the motion of a machine part or the presence of an object.

  4. Thermal cutoff - Wikipedia

    en.wikipedia.org/wiki/Thermal_cutoff

    A thermal switch (sometimes thermal reset or thermal cutout (TCO)) is a device which normally opens at a high temperature (often with a faint "plink" sound) and re-closes when the temperature drops. The thermal switch may be a bimetallic strip , often encased in a tubular glass bulb to protect it from dust or short circuit .

  5. Thermostat - Wikipedia

    en.wikipedia.org/wiki/Thermostat

    Wait (if furnace is relatively recent) until the heat exchanger is at proper operating temperature before starting main blower fan or circulator pump; Oil Similar to gas, except rather than opening a valve, the furnace will start an oil pump to inject oil into the burner Electric

  6. Macaulay Culkin reveals unusual scar he got from Joe Pesci ...

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    “He was like, I want to be menacing to this kid,” he added. Pesci allegedly bit down on Culkin, who is now 44. “I have a scar,” Culkin said.

  7. Watch a walk in the park with their kids become therapy for ...

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