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Watch as I show you how to wire a float switch. Cuses of why a furnace high limit switch would keep shutting it down. Read here for more information:

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The furnace "How it Works" series is a 3D animation of each component. The limit switch is a safety device to protect the furnace In this HVAC Training Video, I show how to Quickly Test Gas Furnace Limit and Safety Switches such as The Flame Rollout Switch, Thermal Limit, Furnace Pressure Switch Troubleshooting