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2. Tips for troubleshooting water heater issues - AOL

   www.aol.com/tips-troubleshooting-water-heater...

   Water heater issues are similar and depend on whether you have a gas or electric heater. The cost to replace the thermostat or heating element are about the same. Costs can vary for a full ...

3. Pilot light - Wikipedia

   en.wikipedia.org/wiki/Pilot_light

   In natural gas furnaces, water heaters, and room heating systems, a safety cut-off switch is normally included so that the gas supply to the pilot and heating system is shut off by an electrically operated valve if the pilot light goes out. This cut-off switch usually detects the pilot light in one of several ways: A flame rectification device. [2]

4. Thermostat - Wikipedia

   en.wikipedia.org/wiki/Thermostat

   Their poor efficiency is acceptable in water heaters, since most of the energy "wasted" on the pilot still represents a direct heat gain for the water tank. The Millivolt system also makes it unnecessary for a special electrical circuit to be run to the water heater or furnace; these systems are often completely self-sufficient and can run ...

5. ANSI device numbers - Wikipedia

   en.wikipedia.org/wiki/ANSI_device_numbers

   23 – Temperature control device, Heater; 24 – Volts per Hertz Relay (in some old analog applications, a 59 and an 81 device would be chained together as a 59/81 to implement the equivalent of V/Hz protection) 25 – Synchronizing or Synchronism-check Device; 26 – Apparatus Thermal Device, Temperature Switch; 27 – Undervoltage Relay

6. These are the top 100 Black Friday deals, according to Walmart

   www.aol.com/lifestyle/these-are-the-top-100...

   $20 $43 Save $23 Hot Wheels remain one of the coolest gifts kids can open on Christmas morning. This set is more than half off today, and it comes with a swirling track and blue car.

7. How to make sure texts and calls are encrypted after the FBI ...

   www.aol.com/news/sure-texts-calls-encrypted-fbis...

   With end-to-end encryption, every user of an encrypted chat app holds the unique code to unscramble a message sent to that account. Importantly, the corporate owner and the operator of the app don ...