Why Is My Outdoor Air Conditioner Steaming?
8 July 2026
Have you noticed water pooling around your outdoor air conditioning unit and wondered if something is wrong?
The good news is that, in most cases, this is completely normal—especially during the colder months when your reverse cycle air conditioner is operating in heating mode.
Here’s why.
Why is there water around my outdoor unit?
When your air conditioner is heating your home, the outdoor unit extracts heat from the outside air.
During cold weather, frost naturally forms on the outdoor coil. To keep your system operating efficiently, it automatically enters a defrost cycle from time to time.
As the frost melts, the resulting water drains from the base of the outdoor unit onto the ground. This often creates puddles or damp patches around the unit.
This is a normal part of your system’s operation and is nothing to be concerned about.
Is water around my outdoor unit normal?
Yes.
It’s completely normal to see:
- Water dripping from underneath the outdoor unit.
- Small puddles forming on the concrete or surrounding ground.
- Damp areas around the unit during or shortly after heating operation.
Many homeowners mistake this for a leak, when it’s actually just condensation and melted frost being drained away.
Why does it happen more in winter?
During winter, your reverse cycle air conditioner spends more time in heating mode.
Colder temperatures increase the amount of frost that can form on the outdoor coil, meaning your system may enter its automatic defrost cycle more frequently.
As a result, you’ll often notice more water around the outdoor unit during the colder months than you would in summer.
When should I be concerned?
While water outside is generally normal, there are a few situations where it’s worth having your system inspected.
Contact Morphett Air if you notice:
- Water leaking inside your home.
- Your system isn’t heating or cooling effectively.
- Your outdoor unit is surrounded by excessive ice that doesn’t clear.
- Error codes appearing on your wall controller.
- Unusual noises or poor performance.
If you’re unsure whether what you’re seeing is normal, it’s always better to ask.
How can I help the water drain away?
There isn’t usually anything you need to do, but it’s a good idea to:
- Keep leaves, mulch and debris away from the base of the outdoor unit.
- Make sure the area around the unit isn’t blocked.
- Avoid placing objects underneath the unit that could prevent water from draining freely.
Allowing the water to drain naturally helps your system continue operating efficiently.
Regular servicing keeps your system performing at its best
Routine maintenance helps ensure your air conditioner continues to operate efficiently throughout winter and all year round.
During a service, our qualified technicians inspect your system, check its operation, and identify any issues before they become costly repairs.
Regular servicing can help:
- Improve efficiency.
- Reduce running costs.
- Extend the life of your air conditioner.
- Keep your home comfortable all year round.
Need Advice?
If you’ve noticed water around your outdoor unit and aren’t sure whether it’s normal, the friendly team at Morphett Air is here to help.
Whether you need expert advice, a maintenance service, or a new heating and cooling system, we’d be happy to assist.
