Derek ColeGM, Simmons One Hour Heating & Air · AI HVAC Answers

Unit Always Running in the Heat

28 Jan 2026 · 1 min

Episode

28 Jan 2026 · 1 min

0:00

Short podcast excerpt (single-speaker) explaining why an HVAC unit may run continuously in very hot weather: the system maintains a set temperature and will keep running until the set point is reached; long run times can be normal and are often more efficient than frequent on/off cycling, provided the unit is properly sized.

Chapters

You don't want to stop running. I mean, think about when it's 98, 100 degrees outside. Think about getting in your car and then driving to the store. How many times did you turn off the ac? Probably not ever. Your home's the same way. It's trying to keep that same temperature all throughout the day. So it's not going to stop running if it's on a set point it's trying to reach. Now, if it reaches that set point, then obviously it's going to turn off. But the unit running for a long period of time is not necessarily a bad thing if the unit is sized. To go back to the first question, if it's sized properly, it is running. It is better for it to run longer because it's more efficient than turning on, turning off, turning on, turning.