Dirty air filter
A completely clogged filter restricts airflow and can freeze the evaporator coil. Change the filter and give the system an hour. This fixes the problem about 30% of the time.
The system is running, the fan is blowing, but the air coming out of the vents is warm. Here's what's usually wrong.
A completely clogged filter restricts airflow and can freeze the evaporator coil. Change the filter and give the system an hour. This fixes the problem about 30% of the time.
If the system is low on charge, cooling capacity drops. You might see ice on the refrigerant lines. This means a leak — adding refrigerant without fixing the leak is temporary.
If the condenser coil is caked with dirt and debris, the system can't reject heat. You can gently hose it down, but if it hasn't been cleaned in years, it needs professional service.
If the compressor is weakening, cooling gradually declines. This is an expensive repair and often means it's time to discuss replacement.
If it's 95 degrees in the house and getting hotter, yes. If it's uncomfortable but not dangerous, it can wait for a scheduled visit — and a scheduled visit is less expensive for you.
Yes. Running a system low on charge stresses the compressor and can cause permanent damage. If you suspect low refrigerant (ice on lines, weak cooling), call for service.