Water from AC in Winter

When you run your air conditioning system on heat mode during winter, you may notice water dripping from the outdoor unit. For many homeowners across Geelong and the Surf Coast, this can look concerning at first. The good news is that in most cases, it’s completely normal and simply part of how modern reverse cycle air conditioning systems operate.

During winter, your air conditioning system works by drawing heat energy from the outside air and transferring it indoors to warm your home. Even on cold days, there is still heat available in the outside air. As the outdoor unit extracts this heat, moisture in the air naturally forms condensation on the coil.

When temperatures drop, this moisture can freeze on the outdoor coil. To keep your air conditioning system running efficiently, the unit regularly enters what’s called a defrost cycle. During this process, the system temporarily reverses operation to melt the ice buildup. The melted ice then drains away as water from the outdoor unit. This is known as condensate.

Seeing water underneath your outdoor air conditioning unit in winter is usually a sign the system is working properly. In fact, higher amounts of condensate are often noticeable during cold, damp Geelong and Surf Coast mornings where humidity levels are higher.

At The Heat Shop, we often receive calls from customers worried their air conditioning system may be leaking. In most situations, the water is simply normal condensate produced during heating operation. However, if you notice excessive pooling, strange noises, reduced heating performance, or ice that does not clear, it may be worth having the system inspected by a qualified technician.

Regular servicing helps ensure your air conditioning system performs efficiently throughout winter and can prevent drainage blockages or airflow issues. Clean filters and properly maintained outdoor units also improve energy efficiency and heating performance.

Whether you’re using a split system or ducted air conditioning solution, understanding how condensate works can give you peace of mind during the colder months. The Heat Shop proudly helps homeowners across Geelong and the Surf Coast stay comfortable with reliable, energy-efficient heating and air conditioning solutions all winter long.