How do I know if my AC needs repair?

Common signs your AC needs repair include: warm air blowing from vents, unusual noises like grinding or squealing, weak airflow, moisture or leaks around the unit, frequent cycling on and off, and unusually high energy bills. If you notice any of these issues, your AC system may need professional attention.

What causes an AC to stop cooling?

An AC may stop cooling due to several reasons: dirty air filters restricting airflow, low refrigerant levels indicating a leak, frozen evaporator coils, faulty compressor, thermostat issues, or blocked condenser unit. In Las Vegas extreme heat, overworked systems and clogged filters are the most common causes.

How often should AC be serviced in Las Vegas?

In Las Vegas climate, AC systems should be serviced at least twice per year - once in spring before the cooling season begins and once in fall. Due to extreme heat and heavy usage during summer months (6+ months of cooling), Las Vegas AC units require more frequent maintenance than typical climates.

What is the average cost of AC repair in Las Vegas?

AC repair costs in Las Vegas typically range from $150-$500 for common repairs like capacitor replacement or refrigerant recharge, $500-$1,500 for compressor issues, and $200-$800 for evaporator coil repairs. Emergency service and weekend calls may cost 20-50% more. Multiple quotes are recommended.

Can I fix my AC myself or do I need a professional?

Simple tasks like changing air filters, cleaning vents, and checking thermostat settings can be done yourself. However, issues involving refrigerant, electrical components, compressor, or internal parts require licensed HVAC professionals due to safety concerns and EPA regulations. DIY repairs on complex issues can void warranties.

AC Not Cooling? 8-Step Troubleshooting Guide

Quick Answer:

If your AC isn't cooling, check: thermostat settings, air filter, circuit breakers, outdoor unit obstructions, and refrigerant levels. 60% of cooling issues stem from dirty filters or thermostat problems - both easy DIY fixes.

8-Step AC Troubleshooting Checklist

Check Thermostat Settings

Verify thermostat is set to "Cool" mode and temperature is at least 3°F below room temp. Check batteries if it's battery-powered. 25% of "not cooling" calls are simply thermostat issues.

✓ DIY Fix - Takes 2 minutes

Replace Air Filter

Dirty filter restricts airflow, reducing cooling by 15-30%. In Las Vegas dust, filters clog in 30 days vs. 90 days elsewhere. Check filter - if you can't see light through it, replace immediately.

✓ DIY Fix - Takes 5 minutes, costs $15-25

Check Circuit Breakers

AC has two breakers: one for indoor unit, one for outdoor unit. If outdoor unit breaker tripped, compressor won't run = no cooling. Reset breakers. If they trip again immediately, call professional.

✓ DIY Fix - Takes 3 minutes

Inspect Outdoor Unit

Check outdoor condenser unit: Is fan running? Clear debris/leaves within 2 feet. Las Vegas dust clogs coils - gently spray with hose (top to bottom only). Don't use pressure washer.

⚠ DIY with Caution - Takes 15 minutes

Check for Frozen Coils

Look at indoor coil (where cold air comes from). Ice buildup? Turn AC off 3-4 hours to thaw. Causes: dirty filter, low refrigerant, or blocked airflow. If it refreezes after thawing, needs professional repair.

❌ Professional Needed if ice returns

Test Refrigerant Levels

Low refrigerant = weak cooling. Signs: ice on outdoor unit, hissing sounds, AC runs constantly but doesn't cool. Refrigerant handling requires EPA certification. Don't attempt DIY.

❌ Professional Only - $200-450

Inspect Compressor

Compressor is the heart of AC cooling. If outdoor unit fan runs but compressor doesn't start (no humming/vibration), it's failed. Replacement costs $1,200-2,500. May be worth replacing entire unit if system is 12+ years old.

❌ Professional Only - Major repair

Check Ductwork

Leaky ducts in attic/crawlspace waste 20-30% of cooling. Signs: some rooms cool, others don't; high energy bills; dust around vents. Duct sealing requires professional assessment.

❌ Professional Assessment - $300-1,000

The Bottom Line

Start with the easy fixes: thermostat, filter, and circuit breakers. These solve 60% of cooling issues and cost under $30. If AC still doesn't cool after these steps, it's time for professional diagnosis. In Las Vegas 110°F heat, don't delay - call same day.

AC Not Cooling? 8-Step Troubleshooting Guide for Las Vegas