If open market operations are to interest rates as a thermostat is to room temperature, what is the role of the Central Bank in this analogy?

In this analogy, the Central Bank acts like the thermostat that controls the temperature in a room, which represents the economy. Just as a thermostat senses the room temperature and adjusts the heating or cooling to maintain a comfortable level, the Central Bank uses open market operations to influence interest rates. When the economy is too hot, meaning people are borrowing and spending too much, the Central Bank might sell government bonds to take money out of circulation, raising interest rates. Conversely, if the economy is too cold, with low spending and borrowing, the Central Bank can buy bonds to inject money into the economy, lowering interest rates. For example, if families are struggling to buy homes, the Central Bank might lower interest rates to make loans cheaper, encouraging more home purchases.