Why Is My AC Freezing Up in Mexico, MO?

It’s a hot Missouri day, and your air conditioner stops working — again. You take a look outside and see something strange: ice buildup on the coils or refrigerant lines. So what’s going on?

If your AC is freezing up in Mexico, MO, the experts at PolarCore Heating and Air Conditioning are here to help. Here’s why it happens — and what you can do about it.

Top Reasons Your AC Freezes Up

1. Dirty Air Filter

Clogged filters reduce airflow, which can cause your evaporator coil to get too cold and freeze over. Change your filter every 1–3 months, especially during peak cooling season.

2. Low Refrigerant Levels

Low refrigerant can drop the coil temperature below freezing, especially in older systems. This usually signals a leak and requires professional repair — don’t try to refill refrigerant on your own.

3. Blocked or Closed Vents

If airflow is restricted because vents are closed or blocked by furniture, cold air can build up in the system and cause ice to form.

4. Dirty Evaporator Coil

Dirt on your indoor coil acts as insulation and prevents proper heat transfer. The coil gets too cold, moisture freezes, and you get ice buildup. A professional coil cleaning can fix this.

5. Malfunctioning Blower Motor

If the blower isn’t moving enough air across the coil, freezing is inevitable. This issue usually requires a service technician to repair or replace the blower motor.

What to Do if Your AC Freezes

• Turn off your AC and switch the fan to “on” to help melt the ice.
• Check and replace your air filter if needed.
• Make sure all vents and returns are open and unblocked.
• Don’t run your system until it’s fully thawed to avoid compressor damage.
• Call PolarCore for AC service if ice returns or if you suspect a deeper issue.

AC Freezing Can Be Prevented

The best way to avoid AC breakdowns in summer is with seasonal maintenance. Our HVAC maintenance plans include inspections, tune-ups, and priority service — so your system runs smoothly when you need it most.

We Fix Frozen AC Systems in Mexico, MO

PolarCore Heating and Air Conditioning serves homes in Mexico, Fulton, Columbia, and throughout Mid-Missouri. Our trained technicians are ready to diagnose and repair your AC quickly.

Request Your AC Repair Today

Call (573) 615-6659 or book online for fast, reliable AC service in Mexico, MO.