The Legend Air Knowledge Hub

Technical guides, troubleshooting tips, maintenance advice, and component explanations
for homeowners in Arlington & DFW

Common HVAC Problems We Solve Daily

No Cooling – What to Check First

Most common in summer. Usually low refrigerant, dirty coils, or a failing compressor.

No heat or weak heat from furnace

Often caused by a dirty filter, faulty thermostat, or ignition/blower motor issues.

Water leaking from indoor unit

Clogged condensate drain line is the #1 cause in North Texas humidity.

High energy bills & poor airflow

Dirty filters, blocked vents, or aging equipment working too hard.

Uneven cooling across rooms/offices

Common in retail and small offices due to poor zoning or ductwork issues.

Frequent breakdowns during business hours

High occupancy + older equipment leads to overload and sudden failures.

High utility costs & poor efficiency

Outdated systems or lack of regular maintenance in commercial spaces.

Loud noises or vibrating units

Often blower motor, fan blade, or compressor issues in rooftop or closet units.