Skip navigation


Meyers Heating & Air Conditioning Blog

Why Is My AC Freezing Up?

There is such a thing as too cold when it comes to your air conditioner. Of course, you want the unit to keep your home cool, but when your air conditioner starts freezing up, that means there is something wrong. 

Our team is here to help with all of your Boulder AC repair needs. You can keep reading to learn more about why your air conditioner freezes up and why it’s such a problem. Don’t wait for your air conditioner to thaw out and hope for the best. Instead, schedule service and get to the root of the problem. 

The Problem With Ice

When your AC freezes up, ice develops on the coils of your indoor or outdoor unit. Ice developing on the indoor condenser coils is absolutely always a problem. In the winter, it’s common for ice to develop on the outdoor portion of your unit, but it should thaw regularly. If it doesn’t, then it’s a problem as well. 

If you notice ice inside at any time of the year, that’s a sign of a bigger problem. When ice develops on your coils, the ice blocks airflow moving through your system. Some homeowners think that ice must mean the air is going to be even cooler, but that’s not the case. In fact, you may not have cool air at all if there is ice on your AC coils. 

Without proper airflow, your AC will continue working harder to try and produce results. This can exacerbate the problem, leading to even more ice development. The cycle will continue until your AC is under so much stress that it breaks down completely. But when you call for an AC repair appointment, our team can figure out why your AC is freezing up and prevent it from happening again.

Refrigerant Charge

If refrigerant is leaking out, this is a problem for two reasons. First, your AC will never be able to cool your home to your expectations. Second, the leaking refrigerant is contributing to a frozen AC. Ice develops because your AC starts to work harder and bring in more air to cool without the ability to do so because of the inadequate refrigerant charge. The cold builds up along your coils and leads to ice as moisture freezes. 


Poor airflow is usually a more common problem than a refrigerant charge. Blockages can happen anywhere in your AC that restricts airflow. For example, if your air filter is particularly dirty, the air cannot enter the system to begin with. It’s also possible to have poor airflow in your ductwork that doesn’t allow cool air to transfer out as it should, also contributing to icy coils.

There’s really no way to tell what the problem is until we get into your system and check it out. There may be some testing that we need to do to get down to the root cause. Keep in mind that you don’t want to attempt any DIY repairs if you have icy coils, especially if your refrigerant lines are involved. It’s possible that you will do more damage than good and be left with an even bigger problem than you started with. Instead, leave a frozen AC up to our experts to fix.

Contact Meyers Heating & Air Conditioning today to schedule an appointment with our professionals.

Comments are closed.