08/25/2026
After hour calls always keep things interesting! Got a call for an AC blowing hot air inside, and when we opened up the outdoor condenser, we found the compressor and lines completely entombed in solid ice. ❄️🔥
When a cooling system starts blowing warm or hot air, continuing to run it while frozen is the fastest way to burn out the compressor.
Why an AC Freezes Up & Blows Hot Air:
Restricted Airflow: A filthy air filter or blocked vents stop warm air from passing over the evaporator coil, dropping temperatures below freezing and cutting off cool airflow.
Low Refrigerant: Leaks in the system drop pressure, causing coils to freeze over solid and forcing the system to blow warm air into the house.
Debris & Dirty Coils: Dirt buildup starves the system of proper heat exchange, turning the unit into a block of ice.
What to Do Immediately:
Shut the AC Off: Turn it off at the thermostat right away to prevent severe compressor damage.
Switch Fan to "ON": Run the indoor blower fan to circulate air and help thaw the coils.
Change the Filter: Check your furnace/air handler filter—a clogged filter is the easiest fix.
Let It Thaw Completely: Never scrape ice off the lines. Let it melt naturally before restarting or running diagnostic checks.
Once this unit thawed out, we cleared out the debris, got the system inspected, and had cold air blowing again instead of heat.
If your system is blowing hot air or frosting over, catch it early before a simple fix turns into a costly replacement.
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