Air Conditioning Repair in Pomona, CA

When summer settles over Pomona, CA, and temperatures creep into the triple digits, there’s nothing more crucial than a working air conditioning system. You rely on it to maintain a cool, comfortable home—but when it breaks down or starts showing signs of trouble, that comfort can quickly disappear.

At All Pro Cooling, Heating, Plumbing & Electrical, we understand how urgent air conditioning repair can be—especially during Pomona’s hottest months. With more than 30 years of hands-on HVAC experience in Southern California, we’ve helped thousands of homeowners restore comfort to their homes quickly and professionally.

Whether your AC is blowing warm air, short-cycling, or refusing to turn on altogether, our team of licensed HVAC technicians is ready to respond. We offer comprehensive AC repair services in Pomona and nearby communities, using state-of-the-art diagnostics and quality parts to deliver repairs that last.

Fast, Local AC Repair in Pomona, CA

Our skilled professionals handle everything from emergency AC repairs to tricky thermostat issues, broken ductwork, and failing compressors. We work on all brands and system types—including central air conditioners, heat pumps, and ductless mini-splits—and we aim to fix most problems on the first visit.

We serve homeowners throughout Pomona, Claremont, La Verne, and surrounding areas with honest pricing, prompt arrival times, and clean, respectful service. When you choose All Pro, you get the confidence of knowing your air conditioning system repair is being handled by a team that’s fully certified, background-checked, and trusted across the Inland Empire.

When homes in the know need cooling relief, they call All Pro at (909) 500-8193 for service that’s done professionally, once and for all!

AC Blowing Warm Air

Typical Causes:

• Low refrigerant due to a leak
• Faulty or damaged compressor
• Dirty or blocked condenser coils
• Malfunctioning thermostat calibration

Typical Repairs:

We begin by checking refrigerant levels and pressure. If there’s a leak, we use UV dye or electronic detectors to pinpoint the location, repair the leak, and recharge the system per factory specs. For compressor issues, we test voltage and continuity to determine if replacement is necessary. Dirty coils? We’ll deep-clean the outdoor unit to restore proper heat exchange.

This is one of the most common cooling issues we see in Pomona, and it’s usually repairable in a single visit.

Unusual Noises or Vibrations

Typical Causes:

• Loose fan blades or motor mounts
• Worn motor bearings
• Obstructions in the outdoor unit
• Failing blower motor or belt

Typical Repairs:

These symptoms can be subtle at first, but they’re often signs of trouble. Our technicians locate and secure any loose parts, replace worn bearings or belts, and ensure proper alignment of internal components. We also inspect the fan motor and compressor for imbalances that could cause long-term wear if ignored.

Strange noises rarely go away on their own. Getting them checked early can save you from bigger problems later.

Uneven Cooling Across Rooms

Typical Causes:

• Leaky or poorly designed ductwork
• Failing blower motor
• Closed or blocked vents
• Ductwork insulation loss or degradation

Typical Repairs:

We start by evaluating the home’s airflow and testing for pressure differences across vents. Duct sealing, ductwork repair, or even minor adjustments to vent direction can dramatically improve comfort. In more severe cases, replacing failing blower motors or resizing ducts may be recommended.

Homeowners are often surprised at how much of their discomfort is due to hidden airflow problems—and we’re trained to uncover and correct them.

Short Cycling

Typical Causes:

• Oversized AC unit for the home
• Malfunctioning thermostat or sensors
• Restricted airflow from dirty filters or clogged ducts
• Refrigerant issues causing premature shutdown

Typical Repairs:

Short cycling not only impacts your comfort—it can damage your compressor. Our technicians evaluate system size relative to your home, inspect and clean filters, and test for refrigerant balance. We also perform thermostat calibration or recommend a replacement if it’s failing to communicate with your unit correctly.

By addressing airflow or sensor issues, we stop the rapid cycling and restore normal, efficient operation.

Water Leaks or Moisture Issues

Typical Causes:

• Clogged or disconnected condensate drain line
• Frozen evaporator coil
• High humidity without proper drainage
• Broken or cracked drain pan

Typical Repairs:

We clear clogs using pressurized tools and inspect the drain line for disconnection or backflow issues. Frozen coils are thawed safely, and we identify why the freezing occurred—often it’s tied to airflow problems or refrigerant loss. Damaged drain pans are replaced to prevent water damage inside your home.

Because Pomona’s hot season comes with low humidity and high usage, water leaks are a red flag that your air conditioning system repair needs immediate attention.

System Won’t Turn On

Typical Causes:

• Tripped circuit breaker or blown fuse
• Faulty thermostat or dead batteries
• Damaged contactor or capacitor
• Internal wiring issues

Typical Repairs:

First, we rule out simple power issues like tripped breakers. If electrical components are the culprit, we replace failed capacitors, repair damaged wiring, or replace malfunctioning contactors. If the thermostat is to blame, we repair or upgrade it and ensure it’s properly calibrated to match your HVAC setup.

This type of issue can leave homeowners hot and frustrated—but our AC repair services are designed to get your system back up and running fast.

Our Proven Air Conditioning Repair Process: What to Expect From Our Team

At All Pro, we take pride in a repair process that’s as efficient as it is thorough. We don’t throw parts at the problem—we take the time to understand what’s really going on with your heating and cooling system.

Step 1: Comprehensive Diagnostic

We check refrigerant levels, test all electrical components, inspect airflow and ductwork, and run the system through a complete cycle. We also check for warning signs of deeper wear—catching issues that other providers might miss.

Step 2: Clear Repair Recommendations

We explain the exact problem, show you what we found (if you’d like to see), and present your repair options in plain language—along with transparent pricing. No surprises, ever.

Step 3: Expert Repairs

With your approval, we get to work. Our trucks are fully stocked with parts for common systems, so in most cases, your AC is repaired in the same visit.

Step 4: Final Testing & Quality Check

We test your system again after repairs to ensure proper cooling, airflow, and thermostat response. If we’ve updated your thermostat, we walk you through its settings so you’re comfortable with the controls.