Find your location


Why is my HVAC system freezing up?

Why is my HVAC system freezing up?

Posted by
Ed Miller on Tue, Oct 22, 2013



Air conditioning units in Jacksonville FL can freeze up for a variety of reasons. Some require little effort on your part but many of them need to be corrected or repaired by a certified service technician. Nevertheless, here are things you should know.

Dirty Evaporator Coil

The evaporator coil, as with any filter, gradually accumulates dirt over time. You won’t notice that you’re losing airflow until your AC freezes up or is not cooling or heating well.

A dirty evaporator coil is an inconvenient and costly problem. It reduces the efficiency of air conditioning units in Jacksonville FL and increases both cooling and heating energy costs.

While it’s possible to pull and clean it yourself, trained HVAC technicians are usually hired to fix the problem. That’s because the Do-It-Yourself approach can further complicate the problem and cause equipment breakdown or costly repairs. Cleaning the front of the coil with a brush, for instance, will only push some dirt deeper into the coil. The entire process can take a maximum of 6 hours depending on the state of the evaporator coil and the accessibility of the air handler. A certified technician may also offer to install highly-efficient air filters and UV light to kill bacteria and mildew usually found in air handlers.

Low Refrigerant

Air conditioning units in Jacksonville FL are likely to freeze up when they’re low on cooling refrigerant or freon, which is actually a refrigerant of many types.

Ideally, HVAC systems should be sealed and should not leak. And like the gas in your car, the refrigerant should stay inside the sealed AC unit to run efficiently. Once the refrigerant leaks, ice typically builds up to the indoor coil.

There are many other signs to look for: the air starts to get warmer, the space takes longer than average to cool, and the floor by your furnace is wet. If any of these happen, call a technician immediately to check your system.

Damaged Blower Motor

The blower motor shows obvious signs when it’s defective. The loud noise is perhaps the most obvious. A functioning blower motor does its job fairly silently without adding noise to the usual air conditioning sound. When the fan inside is not turning or the air pressure seems low, it could also be a sign that your blower motor is not working properly.

A faulty blower motor requires professional help from a certified HVAC technician, one who is widely experienced when it comes to fixing air conditioning units in Jacksonville FL. The blower motor capacitor may have to be replaced.

Dirty Filter

A dirty air filter restricts the airflow, reduces absorption of heat and eventually causes the AC unit to freeze up.

Clogged filters build up ice and block your unit from functioning properly. Don’t wait for your AC to freeze up. Have a technician routinely check and clean or replace your filters to ensure peak performance. This alone can help lower your energy expenses by 5 to 15%.

Air filters should be cleaned every month or two. Some are reusable, others should be replaced. Many filters, however, require frequent attention especially if the unit is constantly used and exposed to a dusty environment.

To sum up, there are four main factors that cause air conditioning units in Jacksonville FL unit to freeze up: a dirty evaporator coil, low refrigerant, too little airflow because of a defective blower motor and a dirty filter.

Regardless of the cause, it’s important to troubleshoot first and see if there’s a simple solution to the problem. Start by shutting down the AC and checking the filter. If it’s dirty, clean or replace it. And if this doesn’t solve the problem, it’s best to let a professional technician fix it. This can save you a lot of time and headaches. The technician will do the following:

  • Check the thermostat.
  • Inspect, clean and tighten connections.
  • Measure airflow through the evaporator coil and clean it if necessary.
  • Check all electric terminals.
  • Get the right amount of refrigerant.
  • Look for any leaks using a leak detector and properly seal your system.

Highly efficient air conditioning units in Jacksonville FL are essential for surviving the intense Florida heat. Make your life easier, more comfortable and less expensive. Contact Snyder today and get your unit checked or fixed.





where you’ll find snyder

Snyder Air Conditioning, Plumbing and Electric serves families across Florida. You'll find our technicians are just a short phone call away in neighborhoods throughout these counties:


  • Alachua
  • Baker
  • Clay
  • Duval
  • Flagler
  • Nassau
  • St. Johns


  • Broward
  • Martin
  • Miami-Dade
  • Palm Beach
  • St. Lucie

Customer Reviews

This was an exceptional experience! We woke up to our A/C on but not cooling (it was 6am and already 81 in the house). The person who set up our appointment was very nice, able to get us seen same-day, and let us know of some options to help save us money.

-Christy Cormier

The service from Sam and Chris was excellent! They were very knowledgeable and professional. They were able to answer all of my questions and completed all of my electrical issues. I will definitely use them again for future jobs. Thank you!

-Adrienne Beal

From the get go I could tell that the Snyder employees were truly professionals and didn’t push to make sales like other companies I’ve talked to my whole life. They took the time to explain so that I could make a decision. The installers and later the duct cleaners were very respectful during their work here. Thank you.

-Mike Daniels

Snyder Heating and AC is dependable, always on time and techs have always been courteous and knowledgeable. Emanuel was a great addition to the company. He was friendly and knew what he was doing. Thank you for great service.

-Linda Ackley

Snyder came in and did a total overhaul of our duct system. They had a great knowledge of what to do to make our home so comfortable! The technicians were all so professional and took great care of us! We’re so thankful for their expertise. Great and easy communication with the call center. We will definitely use them again!

-Crystal Hill

Snyder provided an amazing experience from start to finish. Most of us dread getting estimates with pressuring salespeople. Erik was a great guy, explained all my options and didn’t try to pressure me to act quickly! Justin followed up with my husband and I to offer further assistance in our decision. Again, no pressure, just helped with our follow up questions.

-Michele Bauer

Very prompt, professional, courteous, and cleaned up after repair. Had water line break in my front yard and no pressure. Very pleased and would highly recommend Snyder for all your plumbing, and AC needs. Thank you for making a rough morning get better with ease and professionalism.

-Chuck Jr.

Snyder was easy to get in contact with and had availability the next day. Clint came out and needed some parts so had to reschedule us for the next day for installation. He did a great job converting our old 3 knob shower to one. Looks great! Professional and courteous. 100% recommend this company, especially Clint.

-Nicole Hansen

Very thorough and professional Job

-John Ridenour

Excellent work. Hard worker. Highly recommend.

-Andre A

Professionalism You Can Count On
Schedule Your Air Conditioning Repair Today!

With our highly-skilled technicians & upfront pricing, you can trust the local Jacksonville, FL experts at Snyder Air Conditioning, Plumbing & Electric for 100% satisfaction, guaranteed on all Air Conditioning Repairs.