On a combination limit control, at what temperature does the blower fan turn off?

In a combination limit control system, the blower fan typically turns off at a specific temperature to prevent overheating and maintain safe operating conditions. The correct temperature at which the blower fan turns off is usually around 100°F. This is because the primary function of the blower fan is to circulate air in the system to cool the components and prevent any potential damage from excessive heat.

By setting the blower to turn off at this lower threshold, the system ensures that it can efficiently operate without drawing unnecessary energy or causing strain on the components. The temperature setting helps in creating a balance between heating efficiency and safety, ensuring the system does not operate in a hazardous range. In contrast, higher temperatures, like 200°F or even 130°F, would typically indicate extreme conditions that are not ideal for turning off cooling mechanisms.