Air Con Not Working? How to Reset Your Air Conditioner

It’s the age-old question to ask when technology isn’t working – “have you turned it off and on again?”

Simply restarting a device can do wonders when it’s not working right. This rings true, even for an air conditioning system!

How do you reset an air conditioner though? We’re running you through exactly how you can reset your air conditioner isolator switch so you can get back to the comfort you deserve.

When Should I Reset My Air Conditioning?

There are a few instances where you will want to try and reset your air conditioner. The first is when your air conditioning unit isn’t heating or cooling effectively out of nowhere. This could be due to any number of reasons that require professional help. It could also be a thermostat error that is easily resolved with a reset.

If your air con won’t turn on, a reset is often the quick fix you need. Similarly, if your AC stopped working after a power outage, a hard reset might just do the trick. If your air con switches off by itself, resetting it could be the solution.

How to Reset Air Con with the Isolator Switch

Resetting your air conditioning unit by the isolator switch is simple when you know how to do it. Here are seven steps to reset your AC.

1. Turn off your air conditioner with the remote/central controller.
2. Locate the outdoor unit.
3. Locate the isolator switch – a large plastic V-shaped switch, typically located on the wall next to the outdoor unit (see above picture).
4. Turn the isolator switch off.
5. Leave the unit for one hour.
6. Turn the isolator switch on.
7. Check for any errors with the unit.

Resetting your AC in this way can often resolve minor mechanical problems. If the problem persists after hitting the AC reset button, it’s time to call a professional.

When to Call a Professional

If you’re still experiencing problems, even after a reset, you need to call a licensed HVAC professional to solve this problem. Some of the most common problems we have come across that a reset won’t fix include:

• compressor failure
• fan motor problems
• faulty wiring
• clogged air filters
• blown fuse or another electrical issue

Above all else, if you’re unsure of how to reset your air con at any point, do not continue. One wrong step could make problems worse or even void the warranty on your air conditioning unit.

When you need to get a professional, Metropolitan Air Conditioning has fully licensed and highly experienced technicians who are available 24/7 to help. Call us now and we can have a heating and cooling expert at your door within one hour*.

Please note: This information is provided for advice purposes only. Regulations differ from state to state, so please consult your local authorities or an industry professional before proceeding with any work. See our Terms & Conditions here.