DIY Frequently Asked Questions / Dial Thermostat
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DIY Frequently Asked Questions / Dial Thermostat')">
Controls the temperature in a room turning on or off the furnace or air-conditioner. - Temperature is set manually by a dial.
- One type is low-voltage. It uses power from a transformer that converts 120-volt power into 24 volts.
- Line-voltage thermostats are another type, and use the same power source as the units they control.