Capacitors & contactors
Small electrical components that help start and run the compressor and fan motors. Capacitor failure is one of the most common AC repair causes — symptoms include the outdoor unit humming but not running, or short-cycling.
Air conditioning repair from a local team across Santa Clarita Valley and nearby San Fernando Valley areas. AC blowing warm air, not turning on, leaking water, short cycling, or struggling to cool? We diagnose the issue and explain your options before any work starts.
The most common AC issues we diagnose across Santa Clarita Valley homes and rental properties.
Thermostat set wrong, frozen evaporator coil, refrigerant problem, or outdoor breaker tripped.
Thermostat, tripped breaker, blown fuse, capacitor or contactor failure, or a tripped safety switch.
Clogged filter, blocked vents, blower motor issue, ductwork restriction, or frozen coil.
Failed capacitor, stuck contactor, fan motor failure, breaker trip, or refrigerant lockout.
Clogged drain line, cracked drain pan, frozen coil melting, or drain pump failure.
Clogged filter, low refrigerant, blower motor issue, or extended airflow restriction.
System turning on and off rapidly — thermostat issue, refrigerant problem, dirty coil, or sizing issue.
Capacitor click, motor grind or scrape, refrigerant hiss, rattling component, or buzzing electrical.
Dead battery, wiring issue, calibration off, or the thermostat itself failing.
Dirty coils, low refrigerant, ductwork leaks, or efficiency loss from an aging system.
Some rooms cool, others don't — ductwork imbalance, blocked vents, or thermostat placement.
Capacitor failure, compressor issue, ground fault, or electrical short. Don't keep resetting — call for a diagnosis.
Seeing one of these? Request a diagnosis or call (818) 509-8486.
Waiting can sometimes turn a small repair into a bigger one. None of this is a panic — just things worth a quick call.
We start with your description of the issue, then check the thermostat, airflow, electrical components, condenser/outdoor unit, indoor coil/air handler, and drain line.
We identify what's actually failing and explain the diagnosis in plain language — including the rough cost — before any work begins.
When the repair makes sense, we complete it — often the same visit when parts are on the truck. When replacement is the more practical option, we tell you honestly.
The parts most often involved when an AC fails — explained in plain English.
Small electrical components that help start and run the compressor and fan motors. Capacitor failure is one of the most common AC repair causes — symptoms include the outdoor unit humming but not running, or short-cycling.
The condenser fan motor (outdoor) pulls heat off the coil; the blower motor (indoor) moves cooled air through your ducts. Either failing causes weak airflow or no cooling.
The thermostat tells the system when to run. Wiring issues, dead batteries, calibration drift, or a failing unit are common causes of "AC not responding" complaints.
The drain line removes water from the indoor coil. A clog causes water to back up — leaking around the indoor unit or tripping the float-switch safety to shut the system off.
The indoor evaporator coil absorbs heat; the outdoor condenser coil releases it. Dirt buildup, ice formation, or refrigerant-related issues all show up here.
A clogged filter is the most common cause of weak airflow and frozen coils. Replacing the filter on a regular schedule prevents a surprising number of repair calls.
Refrigerant-related symptoms (low cooling, hissing, ice formation) are diagnosed on-site. We'll explain the findings and the practical next step — don't keep adding refrigerant without diagnosing the underlying cause.
An honest breakdown of when a repair is the right call vs. when replacement might save you money over the next few years.
When the system is on the newer side and the failing part is well-defined and contained.
When repeated repairs are starting to add up and the system is past its useful life.
Local AC service across the SCV and nearby San Fernando Valley areas.
SCV homeowners and property managers rely on a familiar local team that knows the area.
We explain what's wrong with your AC in plain English — and the cost — before any work starts.
Honest repair-vs-replace numbers that respect your budget and the unit's remaining life.
One trusted team for AC, heating, furnace — and major home appliance repair too.
Single-family homes, condos, apartments, and multi-unit buildings — same standard of service.
Clean, on-time, friendly. We respect your home, your time, and your tenants.
The full HVAC service hub — AC, heating, furnace, maintenance, and emergency support.
View HVAC services →Right-sized AC system installation when repair isn't worth it anymore. Honest sizing, clean installs.
View AC installation →Seasonal tune-ups extend the life of your AC, keep airflow strong, and prevent surprise breakdowns.
View AC maintenance →Cold home, weak heat, or thermostat issues? We troubleshoot heating systems quickly.
View heating repair →Honest furnace diagnostics — gas and electric. Ignition, blower, heat exchanger, and control board issues.
View furnace repair →Availability depends on the current schedule — call to check current openings for your area.
Learn more →Real Google reviews from customers across Santa Clarita Valley.
"Great experience with All Year Heating & Air. The team was on time, professional, and fixed the issue quickly. Everything works perfectly now—highly recommend."
"Gene and Yan were extremely professional and arrived right on time. They quickly identified the issue and resolved the problem efficiently, leaving everything working perfectly."
"If you want to get your problem solved you need to use this company and get the job done with great accuracy and great attitude... Trustworthy, honest..."
Common causes are a thermostat issue (set to "Heat" instead of "Cool" or wrong temperature), a frozen evaporator coil from a clogged filter or low refrigerant, a tripped breaker on the outdoor unit, or a failing capacitor. We diagnose the actual cause before recommending a fix.
The indoor system can run while the outdoor condenser is failing — common causes include a bad capacitor, contactor, or condenser fan motor. Refrigerant-related issues can also cause this. We check both indoor and outdoor units to identify the source.
Possible causes: thermostat issue, tripped breaker, blown fuse, failed capacitor or contactor, or a safety switch that's tripped (often the float switch on the drain pan). Quick check: confirm the thermostat is set correctly and check the breaker panel.
Confirm the thermostat is set to "Cool" and at a temperature below the current room temperature. Check the breaker panel for a tripped breaker. Replace or clean the air filter if it's been a while. Check the outdoor unit for visible debris. None of this is required, but quick checks can sometimes save a service call.
It depends on the noise. A loud grinding, scraping, or buzzing sound usually means a part is failing — running it longer can damage other components. A whistle or hiss could indicate a refrigerant leak. If you hear something new, turn the system off and call for a diagnosis.
It depends on the system's age, the cost of the repair, the system's efficiency, and how often it's been failing. A relatively new system with one part failure is usually worth repairing. A 12+ year-old system with repeated issues may justify replacement. We share the numbers honestly so you can decide.
Yes. AC repair is a core service across Santa Clarita, Valencia, Newhall, Canyon Country, Saugus, Stevenson Ranch, Castaic, and nearby San Fernando Valley communities. See full coverage.
Yes. We support landlords, property managers, and rental property owners — single-family rentals, condos, apartments, and multi-unit properties. See our property manager service.
Availability depends on the current schedule — call to check current openings for your area. We'll work to find the next available slot for urgent comfort issues whenever scheduling allows.
Call (818) 509-8486 or use our Request Service form. Tell us your city and what's happening with your AC — we'll follow up to confirm scheduling.
Across Santa Clarita Valley and nearby San Fernando Valley areas. For active AC problems, calling is usually fastest.