Thermostat Wires On Furnace Control Diagram

It reveals the parts of the circuit as simplified shapes. This one is on the low voltage terminal board used to connect the furnace to the thermostat. Thermostat wiring diagrams for heat pumps heat pump thermostat wire diagrams.

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Back in the olden days thermostats were simple on off devices that didn t need their own continuous power supply.

Thermostat wires on furnace control diagram. Variety of goodman furnace thermostat wiring diagram. Heat pumps use staging for auxiliary heat and need a w2 terminal. My paperback and e book. This video is part of the heating and cooling series of training videos made to accompany my websites.

The most common color i ve seen used for this terminal and wire designation is a brown wire but this varies and is entirely up to the installer what color to use. A wiring diagram is a simplified standard pictorial representation of an electrical circuit. For example if the red wire is connected to w on the thermostat the furnace should turn on. There are gas furnaces with low fire and high fire and some depend on control from a two stage heating thermostat with a w2 terminal.

But is not worried about the physical layout of the wires. The line voltage feeding the furnace to operate the fan blower motor is transformed down to a safer level of 24 volts the gas control valve needs 24 volts to open and after making a series loop through at least one safety device the most basic and mandatory one is an over temperature shut down the power goes up to the thermostat and when the room temperature falls below the set point. Furnace thermostat wiring diagram terminal letters on a thermostat and what they control the hot wire 24 volts usually red from the transformer is the main power wire to turn on or off a furnace components. Modern thermostats with wi fi and backlit display by contrast need a steady supply of juice the c wire or common wire enables the continuous flow of 24 vac power to the thermo.

Heat pumps are different than air conditioners because a heat pump uses the process of refrigeration to heat and cool while an air conditioner uses the process of refrigeration to only cool the central air conditioner will usually be paired with a gas furnace an electric furnace or some other method of heating.