AC Not Cooling / Frozen Coil repair in Orlando, FL

Verified against official sources · Updated 2026-07-06

Thinking about an AC not cooling / frozen coil repair in the Orlando area? Here's what actually matters — permit rules for Orange County and the City of Orlando, plus the mistakes and code requirements that trip up homeowners, sourced from manufacturer manuals and the Florida Building Code.

Do you need a permit?

Permit required. Mechanical permit for ALL permanently installed AC/heating equipment, including like-for-like changeouts; plug-in window/portable units exempt.
Source: https://www.orangecountyfl.net/PermitsLicenses/Permits/MechanicalPermit.aspx

Key facts before you start

Diagnostic order (Carrier): thermostat FIRST — confirm COOL mode, setpoint below room temp, fresh batteries — then pull the filter. A clogged filter is the #1 cause of a frozen evaporator coil (Trane), so check it before suspecting refrigerant.
Frozen coil (ice on copper lines, weak airflow, water around air handler): set thermostat COOL->OFF but FAN->ON to speed the thaw; full melt takes hours (plan 2-24h). Never run cooling while frozen (compressor damage) and NEVER chip or pry ice — it punctures the coil and causes refrigerant leaks. Replace the filter and confirm the coil is fully thawed before restart; do the thaw BEFORE booking service since the coil must be ice-free to diagnose.
If the coil refreezes after a full thaw + new filter, stop DIY: remaining causes (refrigerant leak/low charge, dirty evaporator coil, blower/airflow fault, metering device) are professional-only per Trane — repeated freezing means call a tech, not another thaw cycle.
Refrigerant is never DIY: EPA Section 608 restricts attaching gauges, opening the refrigerant circuit, or adding/removing refrigerant to certified technicians, and refrigerant cannot legally be sold to homeowners. Any 'recharge it yourself' plan is illegal and wrong.
System fully dead (no airflow at all) is a different branch: thermostat OFF -> AC breaker off 5+ minutes -> restore (Carrier). If it re-trips, or the drain pan is full, a condensate float switch has intentionally cut the system — clear the drain line (see condensate category) instead of repeatedly resetting the breaker.
Weak cooling with a clean filter: kill power at the outdoor disconnect, clear debris 2 ft around the condenser, and gently rinse the fins with a garden hose (no pressure washer — bends fins). Short cycling (shutting off before completing a cool cycle) points to thermostat fault/placement in sun, low refrigerant, or an oversized unit — oversizing is fixable only by replacement (Trane/Carrier).

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Sources

https://www.carrier.com/us/en/residential/hvac-resources/air-conditioners/ac-not-blowing-cold-air/
https://www.trane.com/residential/en/resources/troubleshooting/air-conditioners/evaporator-coil-is-frozen/
https://www.trane.com/residential/en/resources/blog/frozen-evaporator-coil-causes/
https://www.trane.com/residential/en/resources/troubleshooting/air-conditioners/ac-short-cycling/
https://www.epa.gov/section608/section-608-technician-certification-requirements
https://support.trane.com/hc/en-us/articles/12187921759501-Condensate-Drain-Pan-Overflow-Switch

This guide is general informational content, not professional or legal advice. Codes and county rules change — confirm permit requirements with your local building department, and use a licensed professional for electrical, gas, structural, or main-line plumbing work.