When the thermostat says 85 and the house keeps climbing, you need an answer, not a sales pitch. Back2Cool HVAC handles AC repair in Los Angeles and across the San Fernando Valley from our base on Woodman Ave in Sherman Oaks. We work 7 days a week, 8 AM to 10 PM, and same-day visits are common. Every repair starts the same way: find the real reason the system failed, explain it, and price the fix before we touch anything.
"AC died on me in the middle of that heat wave... called these guys in the morning and someone was out by the afternoon. The tech was super nice, showed me what the problem was and didn't try to upsell me on a whole new unit like the last company did. Fixed it in about an hour, and the price was reasonable. House is finally cool again lol. Will def use them again!!"
Danny G. · Thumbtack
AC Not Cooling? Common Symptoms and What Usually Causes Them
Most AC breakdowns in LA homes trace back to a short list of causes. Knowing the symptom helps you describe the problem on the phone, and sometimes it points to a quick check you can do yourself first. For a deeper troubleshooting walk-through, read our guide on why your AC is not cooling in Los Angeles.
| What you notice | Likely causes |
|---|---|
| Outdoor unit hums but the fan does not spin | Failed run capacitor, seized fan motor, or a stuck contactor |
| Air from vents is barely cool | Low refrigerant from a leak, dirty outdoor coil, dirty evaporator coil, or a compressor that is not starting |
| Ice on the copper line or indoor coil | Restricted airflow (clogged filter, dirty coil, weak blower) or low refrigerant charge |
| Water around the furnace or air handler | Clogged condensate drain line, full or cracked drain pan, or a tripped float switch |
| System will not turn on at all | Tripped breaker, blown low-voltage fuse, float switch shut-off, or a thermostat problem |
| Short cycling (on and off every few minutes) | Oversized system, thermostat placement, a failing capacitor, or an overheating compressor |
| Grinding, squealing or buzzing | Worn motor bearings, a loose fan blade, or electrical parts arcing |
A few checks before you call
- Make sure the thermostat is set to Cool and below room temperature, and replace the batteries if it has them.
- Look at the air filter. If it is gray and caked, swap it. A choked filter is one of the most common reasons a coil freezes.
- Check the breakers for both the indoor unit and the outdoor condenser.
- If you see ice, turn the system off and run only the fan for a few hours. Running a frozen system can damage the compressor.
If none of that brings the cold air back, it is time for a technician. Please do not open the electrical panel on the condenser yourself. Capacitors hold a charge even with the power off.
How an AC Repair Visit Works
We keep the process simple and transparent, because nobody wants to feel pressured in a hot house.
- We listen. When did it start, what changed, what noises, what the thermostat shows. Your details save diagnostic time.
- We inspect. Thermostat, indoor unit, filter, coil, drain, outdoor unit, electrical components and refrigerant circuit.
- We diagnose the root cause. A failed capacitor is often a symptom. We look for why it failed, such as heat, a weak motor or voltage problems, so it does not happen again next month.
- We explain your options. You see what we found and get clear pricing before any work is approved.
- We fix it. Many common repairs, like capacitors, contactors, fan motors and drain clears, are handled in the same visit.
- We verify. We check temperatures and operation before leaving, so you know it is actually cooling, not just running.
That approach is something customers mention often. Ashley S. wrote that the tech "didn't just swap parts, he actually figured out why it broke and explained the whole thing to us so we'd know what to watch for next time."
Need it fixed today?
$55 service call with code LA55 — inspection, diagnosis and a clear price before any work. Open 7 days · 8 AM – 10 PM.
The $55 AC Repair Service Call (Code LA55)
Mention code LA55 when you book and the service call is $55. That covers a full system inspection, a diagnosis of the issue and clear recommendations. If you decide to go ahead with the repair, the $55 is applied toward it. If you decide not to, you still walk away knowing exactly what is wrong and what it takes to fix it.
We recommend only the work necessary to restore safe, reliable operation. If the fix is a part and an hour of labor, that is what we quote.
R-410A Systems vs. New A2L Systems: What It Means for Your Repair
Most central air conditioners in LA homes installed over roughly the last fifteen years use R-410A refrigerant. Under the EPA AIM Act, new residential systems manufactured from January 1, 2025 use lower-GWP A2L refrigerants such as R-454B or R-32. Here is what that means for you as a repair customer:
- Your R-410A system can still be repaired and recharged. Nothing forces you to replace a working system.
- R-410A supply is being phased down, so refrigerant can get more expensive over time. A one-time top-off after a leak repair is one thing. A system that needs refrigerant every summer is a different conversation.
- You cannot mix refrigerants. An R-410A system is not converted to R-454B. If you replace, the outdoor and indoor sides are typically replaced as a matched set.
Our article on the R-410A phase-out and A2L refrigerants in California goes deeper if you are planning ahead.
Repair or Replace Your AC? An Honest Rule of Thumb
We fix far more systems than we replace, and we would rather earn a customer for the next ten years than sell one unit today. Still, some situations call for an honest replacement conversation.
- Repair usually makes sense when a single part failed (capacitor, contactor, fan motor, igniter, drain issue) and the system otherwise runs well.
- Repair usually makes sense for a refrigerant leak that can be found and fixed at an accessible spot, like a flare fitting or service valve.
- Replacement is worth discussing when an older system needs a compressor or a new coil.
- Replacement is worth discussing when the system leaks refrigerant year after year, or has needed several repairs in a short span.
- Replacement is worth discussing when the home never cooled evenly because the system or ducts were sized wrong from day one.
If replacement does make sense, we size the new system with a proper load calculation and handle the permit and Title 24 steps. See our AC installation and replacement page for how that works, or our longer guide on whether to repair or replace an AC in Los Angeles. Not sure where you stand? Send us a photo of your system and we will tell you straight whether it needs replacing or just a repair.
Air Conditioner Repair in Sherman Oaks and Across the Valley
San Fernando Valley summers are a different animal from the coast. Triple-digit days are common, Woodland Hills hit 121°F in September 2020, and heat waves often run from August into October with Santa Ana winds. An air conditioner that limps through June can give out on the first 105-degree afternoon, which is why we see a spike in calls every fall.
We handle air conditioner repair in Sherman Oaks, Studio City, Encino, Van Nuys, North Hollywood and Burbank, plus the rest of Los Angeles. Rooftop units on condos and small commercial spaces, split systems in attics and garages, package units and window or wall units are all part of the job.
We also repair
- Ductless mini-splits, including leaks at flare connections and drain problems
- Heat pumps that cool fine but struggle in heating mode, or the other way around
- Thermostats, including smart thermostat wiring problems after a DIY install
- Window, wall and portable AC units
Keep the Next Breakdown From Happening
A lot of emergency repairs are maintenance problems that waited too long: a dirty outdoor coil that overheated the compressor, a capacitor that drifted weak for a season, a drain line that finally clogged. An annual AC tune-up before the Valley heat arrives catches most of those early.
Need help today? Call (626) 635-4095 and ask for the LA55 service call. We are open 7 days a week, 8 AM to 10 PM.
