The Rh wire, also known as the heating power wire, is an essential component in your HVAC system. It plays a crucial role in providing power to your heating system. This wire is typically connected to the R terminal on your thermostat and is responsible for delivering a constant 24-hour supply of electric power from the transformer to your heating system.
To understand where the Rh wire gets its power from, we need to delve into the functioning of the HVAC system. The HVAC system consists of a transformer that converts high voltage electricity from your home’s power supply to a lower voltage suitable for the system. This transformer is usually located within the furnace or air handler.
The primary function of the transformer is to supply power to various components of the HVAC system, including the thermostat. The transformer typically has two wires: the Rc wire and the C wire. The Rc wire is connected to the cooling system, while the C wire, also known as the common wire, provides a continuous ground for the system.
Now, coming back to the Rh wire, it is connected to the R terminal on your thermostat, which is responsible for controlling the heating system. The R terminal receives the 24-volt power from the transformer through the Rh wire. This wire serves as a power source for the heating system and ensures that it receives a constant supply of electricity.
The Rh wire gets its power from the transformer in your HVAC system. The transformer converts the high voltage electricity from your home’s power supply to a lower voltage suitable for the HVAC system. The Rh wire is then connected to the R terminal on your thermostat, providing a continuous 24-hour power supply to your heating system.
It’s important to note that the specific wiring configuration may vary depending on the type and model of your HVAC system. If you are unsure about the wiring or need assistance, it is always recommended to consult a professional HVAC technician.