Common Reasons Your AC Isn't Cooling
When an air conditioner runs but fails to cool, the underlying issue often falls into one of several predictable categories. Understanding these causes helps you communicate the problem clearly to a technician and prepares you for what repairs might be needed.
The most frequent culprits include a clogged or dirty air filter restricting airflow, low refrigerant due to a leak, a malfunctioning compressor that cannot circulate refrigerant, a broken thermostat sending incorrect signals, or frozen evaporator coils blocking heat exchange. Each requires a different approach to fix.
Key Factors in AC Cooling Failure
Multiple components must work together for your AC to cool effectively. Here are the main factors that contribute to loss of cooling capacity:
A clogged air filter, blocked vents, or debris around the outdoor unit restricts cold air circulation throughout your home.
Low refrigerant indicates a leak. The system cannot remove heat from indoor air without adequate refrigerant charge.
The compressor is the heart of your AC. If it fails or runs intermittently, cooling stops or weakens significantly.
A faulty thermostat may misread room temperature or fail to signal the system to run, leaving your home warm.
Frozen or heavily soiled coils cannot absorb heat efficiently, reducing cooling output.
Gaps or holes in ducts allow cold air to escape before reaching living spaces, wasting cooling capacity.
Troubleshooting Steps Before Calling a Technician
Before scheduling a repair appointment, try these simple checks. They often resolve minor issues and help pinpoint the problem for your technician.
When to Repair vs. When to Replace
If troubleshooting doesn't restore cooling, you'll need professional help. A technician can determine whether repair or replacement makes sense for your situation.
Repair Usually Makes Sense
Your system is under 10 years old, the repair cost is less than 50% of replacement cost, and the issue is isolated (e.g., a capacitor, contactor, or refrigerant refill). Many AC problems are fixable at reasonable cost.
Replacement May Be Better
Your AC is over 12 years old, the repair exceeds 50% of a new system's cost, the compressor has failed, or you face multiple repairs within a year. Newer units run more efficiently and may lower your energy bills.
Get a Professional Opinion
A certified technician will inspect your unit, test refrigerant pressure, measure airflow, and check electrical components. They'll recommend repair or replacement based on your system's condition and age.
Don't Wait in the Heat
AC problems often worsen quickly in Montgomery's hot summers. Request a free quote today, and a local Keystone HVAC technician will diagnose the issue and discuss your repair or replacement options.
What to Expect During a Professional AC Inspection
When you call a technician for AC repair in Montgomery, here's what a thorough inspection typically includes:
The technician will start by listening to the system and visually checking the indoor and outdoor units for obvious damage or debris. They'll measure the temperature difference between the supply and return air to verify cooling capacity. Using specialized gauges, they'll test refrigerant pressure to detect leaks or low charge. They'll inspect electrical connections, test the thermostat, and check capacitors and contactors for failure. Finally, they'll review the system's maintenance history and explain their findings in plain language, then recommend next steps.
This diagnostic approach ensures you're getting an accurate picture of your AC's condition before committing to a repair.