Air Conditioner Runningbut Not Cooling Your Home
Troubleshoot warm air issues safely in the Las Vegas valley.
- Written price before work
- Local since 2006
$50 off any repair of $250 or more. See specials
- NV License #0000000
- Locally owned since 2006
- Labor guarantee on repairs
- Free replacement estimates
- Background-checked team
Check These First
Common Causes ofWarm Air from Vents
Before calling for service, run through these six safe checks to see why your cooling system is blowing warm air.
Incorrect Thermostat Mode
Check if the thermostat is set to Cool and the fan is set to Auto. If set to On, the fan blows air continuously even when cooling stops.
Clogged Air Filter
A dirty filter chokes airflow across the indoor coil. This can cause the system to freeze up and blow warm air into your rooms.
Tripped Breaker
Your air conditioner relies on separate breakers for the indoor and outdoor units. A tripped outdoor breaker keeps the compressor from running.
Dirty Outdoor Coil
Monsoon dust and outdoor debris build up on heat exchanger fins. When airflow is blocked, the system cannot release heat effectively.
Blocked Return Vents
Furniture or rugs over return grilles, or closed supply vents, restrict airflow and can keep your cooling system from lowering the room temperature.
Ice on Refrigerant Lines
Frost forming on copper pipes can point to reduced airflow or low refrigerant pressure. Turn off cooling immediately to allow ice to melt.
Step-by-Step Guide
Four Safe Steps toCheck Your Air Conditioner
Follow this basic sequence to narrow down simple thermostat or airflow issues without opening electrical panels or touching machinery.
Verify Thermostat Settings
Ensure your thermostat is set to Cool, with the setpoint lower than current room temperature, and set fan control to Auto.
Inspect the Air Filter
Pull out your return air filter. Replace it immediately if it is coated in dust or hair, as severe restriction causes coil icing.
Check the Main Breakers
Locate your electrical panel and verify that both indoor and outdoor HVAC breakers are on. Reset a tripped switch once.
Clear Outdoor Surroundings
Ensure your exterior condensing unit has plenty of clear space around its cabinet for proper heat discharge.
When to Stop Checking and Call a Technician
If resetting the circuit breaker causes it to trip a second time, leave the breaker off and request professional service. Repeated trips indicate an electrical fault that requires testing. If you notice ice forming along the copper lines, turn the thermostat to Off and switch the fan to On to begin defrosting before your service visit.
Professional Service
What Our Technician Does on This Call
Every diagnostic visit follows a clear, thorough process so you know what failed and how much the repair costs.
Find the Cause: Our technician tests electrical components, airflow balance, and system operation to find the cause of the failure.
Show What Failed: We walk you to the equipment and demonstrate the damaged part or mechanical issue directly so you understand the problem.
Written Price Before Work: You receive a flat-rate price quote in writing before any repair work begins. You approve the cost before we proceed.
The Repair and a Test: After completing the repair, we run a full operational cycle to confirm your system cools properly before leaving your home.
Common Questions
Questions About Cooling Issues
Here are factual answers to common questions about air conditioners blowing warm air in Las Vegas homes.
Why is my AC running continuously but not lowering the house temperature?
When summer temperatures exceed 100°F, a system with restricted airflow, low refrigerant pressure, or a weak capacitor may run constantly without generating cold air. Checking the filter and outdoor unit airflow is the best starting point.
Can a dirty air filter really stop an air conditioner from cooling?
Yes. Severe airflow restriction prevents warm indoor air from passing across the evaporator coil. This can lower coil temperatures below freezing, turning moisture into ice and stopping heat transfer completely.
What should I do if I see ice on the copper pipes outdoor or indoor?
Turn off the cooling setting at your thermostat immediately and turn the fan setting to On. Running the cooling system while frozen can cause liquid refrigerant to enter the compressor and damage it.
How many times can I reset a tripped breaker for my air conditioner?
Reset a tripped HVAC breaker only once. If it trips again immediately or during operation, leave it off, as repeated resets can point to an electrical fault.
Can I add refrigerant myself?
No. Anyone who handles refrigerant must hold EPA Section 608 certification. Low refrigerant means your system has a leak that needs to be found and repaired.
Restore Cold Airto Your Las Vegas Home
Schedule diagnostic service across the Las Vegas valley.
If your air conditioner stops cooling during summer heat, call us. We go out evenings, nights, weekends and holidays.
