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Why Does the Outside Heat Pump Fan Run When It’s In Heating Mode?

Heat Pump

If you have a heat pump system at home in Westlake, OH, you might have noticed something unusual about the unit and thought to yourself “should the outside fan run when the heat is on?” This can be a bit puzzling and may seem counterintuitive. Rest assured, there’s a logical explanation for this behavior. Here’s why the outside heat pump fan runs during heating mode and why it’s an important part of the system’s operation.

Understanding Heat Pumps

Before we get into the bigger question, let’s have a quick look at how a heat pump works. It is a highly efficient HVAC system that can both heat and cool your home. It does this by transferring heat between the inside and outside of your home, rather than generating heat like a furnace or other older types of system.

The Role of the Outside Fan

The outside unit of a heat pump contains an important part called the condenser. In cooling mode the condenser works to release heat from inside your home to the outdoors. In heating mode the condenser’s role is reversed. It extracts heat from the outdoor air and brings it inside your home.

The Big Question

In heating mode the heat pump extracts heat from the outdoor air. This works even when it’s cold outside. The outside fan helps with this heat exchange process. It pulls in cold outdoor air over the condenser coils. This is where the heat exchange takes place. Running the fan makes sure there is a continuous flow of air over the coils. This allows the heat pump to extract heat.

In colder climates frost can accumulate on the condenser coils during the heating process. When this happens the outside fan may stop briefly and the heat pump goes into a defrost cycle. During this cycle the system temporarily switches to cooling mode to melt the frost on the coils. Once the coils are clear the outside fan returns to its normal operation in heating mode.

Running the outside fan during heating mode also helps maintain the heat pump’s efficiency. Consistent airflow allows for optimal heat transfer. This makes sure that your heat pump performs at its best.

In Summary

While it may seem strange for the outside heat pump fan to run in heating mode, it’s an important part of the system’s operation. It plays a large role in the heat exchange process and makes sure that your system can extract heat properly from the outdoor air. Even in colder conditions.

Understanding why the outside heat pump fan runs in heating mode helps you appreciate the technology behind these highly effective HVAC systems. So, the next time you see that fan running in the winter, you’ll know it’s all part of your heat pump’s strategy to keep your home warm and comfortable!

If you’re ready for heat pump installation in your home, contact Westland Heating, Air Conditioning and Plumbing today to schedule your appointment!

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