4 Common Reasons Why AC Systems Blow Warm Air

An AC system may malfunction at any time, and it often happens when it is most needed. One of the most common cooling issues reported by homeowners is systems that blow warm air. They might overlook other signs, such as noises and strange smells, coming from their systems.  Homeowners who experience this inconvenience are likely to panic about the likelihood of an expensive air conditioning repair being needed. Routine maintenance is a good way to detect a malfunctioning AC system and can be the main factor in whether a system's performance continues to decline. The following points identify potential reasons an air conditioning system may stop cooling.

Clogged Filter

This is the first thing homeowners should check if they experience cooling issues. Sometimes the everyday requirements of maintaining life can interfere with remembering to do routine household chores, such as filter changes. There are a variety of factors that impact the frequency of how often air filters need to get changed. It is worth the time to inspect filters each month for dirt or debris contamination. Clogged filters impede airflow, which results in warm air instead of cool air flowing through.

Faulty Thermostat

Thermostats are an important portion of HVAC systems. Unfortunately, some homeowners do not realize that it is possible for thermostats to require replacement before other portions of their systems. Some thermostats require battery replacements and replacing the batteries may correct cooling issues. It is also possible for thermostats to stop working properly due to their age or mechanical malfunction. An air conditioning contractor can inspect and determine if a thermostat requires repair or replacement.

Refrigerant Leaks

There are a variety of things that can lead to refrigerant leaks. A common cause is the lack of maintenance, which ensures that the refrigerant in AC units is properly charged. Maintenance also helps to identify worn and loose parts, which can also cause leaks. 

Frozen Evaporator Coils

The coils in a condenser might freeze when there is a refrigerant leak. This interferes with the unit's ability to condense heat and distribute cool air. Frozen evaporator coils cannot transfer heat to the condenser coils, which results in units blowing warm air. Substances, such as algae and debris, may also cover evaporator coils and cause freezing. Frozen coils need to thaw out, which means that homeowners should not try to use their AC systems during the time they are waiting on the air conditioning repair service.

An air conditioning contractor is a good resource to use to learn more about subtle repair signs that can lead to systems producing warm air. They can perform routine inspections and maintenance to improve the chances of systems lasting to or past their estimated life spans.

Contact a local HVAC service, such as Wyoming Air, to learn more.