Frozen outdoor unit or ice on coil
Why Is My AC Unit Frozen in Granbury, TX?
What you might be seeing
A frozen AC outdoor unit or indoor coil often indicates an underlying issue that may impact cooling performance and could require professional attention.
Visible ice accumulation on the outdoor unit or indoor evaporator coil.
Warm or less cool air coming from supply vents.
Reduced airflow throughout your home.
Puddles of water around the indoor unit or drain pan.
Common causes
Restricted Airflow from a Dirty Air Filter
A clogged filter can severely limit air moving over the coil, causing it to get too cold and freeze.
Low Refrigerant Levels (Refrigerant Leak)
Insufficient refrigerant pressure can cause the evaporator coil to drop below freezing point, leading to ice formation.
Blocked Condensate Drain Line
A clogged drain can cause water to back up and freeze on the coil, especially in humid climates like Granbury.
Blower Fan Malfunction or Obstruction
If the indoor fan isn't moving enough air, the coil can get too cold and freeze.
Safe checks to try
Only try steps you are comfortable with — stop if anything feels unsafe.
Immediately turn off your AC unit at the thermostat and the breaker if you see any ice.
Stop if: Do not attempt to chip ice or operate the unit while frozen, as this can cause further damage.
Check and replace your air filter if it appears dirty or clogged.
Stop if: If the filter is clean but ice persists after thawing, proceed to other checks.
Ensure all indoor supply and return vents are open and unobstructed by furniture or drapes.
Stop if: If vents are clear but airflow remains poor, a deeper issue may be present.
Verify your thermostat settings are appropriate and that it's functioning correctly.
Stop if: If the thermostat seems faulty or unresponsive, professional diagnosis may be needed.
When to call a professional
- Ice reforms on the unit or coil shortly after thawing and restarting.
- You suspect a refrigerant leak (hissing sounds, oily residue).
- The AC unit fails to cool your home effectively after performing safe checks.
- Unusual or loud noises persist from the indoor or outdoor unit.
- You are unsure about the cause or uncomfortable performing any checks.
What to ask if you hire
- 1.Can you perform a leak detection test to check for refrigerant leaks, especially on older R-22 systems common in Granbury?
- 2.What is the condition of my ductwork, particularly in attic runs, and could it be contributing to airflow issues?
- 3.Will you check the condensate drain line for blockages and ensure proper drainage?
- 4.What is the estimated cost for repairs, and are there any warranty considerations for parts or labor?
- 5.Can you assess the overall health of my system, considering the attic heat load in this area?
What to look up next
- Ensure all proposed repairs are clearly itemized with associated costs.
- Confirm that the technician has explained the root cause of the freezing and the solution.
- Verify that any new parts installed come with a manufacturer's warranty.
- Ask for a written estimate before any work begins and compare it to the final invoice.