A humming outdoor unit with a fan that will not turn is the classic summer service call in Novato, CA, and the cause is usually a failed run capacitor. That inexpensive component starts the compressor and fan, fades for years without complaint, and then quits under peak load. It is far from the only suspect, though. Contactors pit and stop passing clean power, condenser fan bearings dry out, small refrigerant leaks drain away cooling capacity, and evaporator coils ice over when a clogged filter strangles airflow.
At Novato HVAC, every AC repair starts with measurement. Capacitors are metered against the rating on the label. Amp draws on the compressor and fan motor are compared to the data plate. Refrigerant charge is judged by superheat and subcooling, not by pressure readings alone, and any icing prompts a look at the evaporator coil, blower wheel, and filter. This matters because a single warm-air symptom can hide four different faults at four very different prices, and a refrigerant top-off that ignores the leak is just a short-term rental on cold air.
Honest advice is part of every visit. If an aging system's compressor has failed, we explain the repair-versus-replacement math plainly and let you decide. Most of the time, though, the fix is simpler, and because our trucks stock capacitors, contactors, fan motors, hard-start kits, and condensate pumps, cooling is usually restored before we leave. We work on central air, heat pumps, and ductless mini splits from all major brands. Need AC repair in Novato? Call (415) 234-7418 and an experienced technician will be on the way.
When the heat goes out, see Furnace Repair in Novato.
How Much Does AC Repair Cost in Novato?
For most Novato homeowners, an AC repair comes in somewhere between $150 and $650. Where you fall in that range depends almost entirely on which component failed. You'll get an upfront quote from Novato HVAC before we touch a single part.
| Repair | Typical cost | What it usually means |
|---|---|---|
| Capacitor replacementMost common repair, usually same visit | $150–$400 | Most common repair, usually same visit |
| Contactor replacementBurned or pitted switch that powers the outdoor unit | $150–$350 | Worn relay that stops the condenser from starting |
| Condenser fan motorOutdoor fan stops, compressor trips on high heat | $300–$700 | Outdoor fan stops, compressor trips on high heat |
| Refrigerant leak repair + rechargeDepends on leak location and refrigerant type | $300–$1,500 | Varies with where the leak is and how much charge is lost |
| Evaporator coil replacementMajor repair; worth weighing against replacement on older systems | $1,000–$2,500 | Major repair; worth weighing against replacement on older systems |
| Compressor replacementLargest single repair; often weighed against a new system | $1,500–$3,000 | On systems past 10–12 years, replacement usually makes more sense |
Typical ranges for common repairs. Your exact price is quoted after diagnosis.
Factors That Change the Price
- The age of the system and whether parts are still readily available
- Refrigerant type, because R-22 recharges are much more expensive
- Whether the repair is urgent, after hours, or can be scheduled
- How hard the equipment is to reach, such as attics, crawlspaces, or rooftops
If a repair would cost more than a third of a new system, or your AC is past 12 to 15 years old, we'll show you both numbers side by side so you can decide. Call (415) 234-7418 for a quote.
Warning Signs for AC Repair
The sooner you notice these red flags, the easier and cheaper the problem is to resolve. Here are the most common indicators that it's time to call a professional:
- A hot electrical smell or a tripped breaker whenever the air conditioner kicks on
- Ice on the refrigerant lines or a frozen indoor coil
- A condenser fan that sits still while the outdoor unit hums
- The system short-cycling every few minutes without cooling the house
- Warm or room-temperature air blowing when the thermostat calls for cooling
- Water leaking around the indoor unit or from the ceiling below it
- A hiss or gurgle from the lines, a common sign of leaking refrigerant
- Cooling bills climbing while the house stays sticky and warm
Don't Wait for a Total Failure
Most HVAC failures start small, a weak capacitor, a squealing blower, a system that runs a little longer each week. At the first hint of a problem, reach out to Novato HVAC at (415) 234-7418 for a fast inspection.
AC Repair FAQ
The Benefits of Professional AC Repair
An air conditioner puts several hazards into one cabinet. The capacitor can deliver a painful shock long after the breaker is off, the condensing unit is wired for 240 volts, and the refrigerant circuit is a sealed, pressurized loop that federal rules forbid venting. Servicing it properly takes gauges, a recovery machine, and a vacuum pump, not a DIY recharge can. Diagnosis has its own traps. A frozen coil is as likely to be an airflow issue as a charge issue, and recharging a system that still leaks wastes money while moisture and acid work on the compressor.
Professional repair gets the whole picture. Our experienced technicians meter electrical components instead of swapping them, weigh charge decisions against measured superheat and subcooling, find leaks with detectors and dye rather than assumptions, and check the filter, blower, and duct static pressure whenever airflow is suspect. That is the difference between a repair that holds through the season and a parts-cannon fix that calls you back in three weeks. And when the system genuinely is not worth saving, we tell you that plainly too, with numbers instead of pressure.
How Our AC Repair Works
We follow a proven process to ensure every repair and installation is completed to the highest standards. Here's a look at each step our Novato HVAC team takes:
Full Cooling Diagnosis
Capacitors, the contactor, motors, and amp draws are all measured, the charge is evaluated through superheat and subcooling, and the coil, filter, and drain are inspected so the real failure is found.
Clear Explanation & Price
Nothing happens without your approval. We explain what broke and why, quote a firm price, and, if the compressor or coil has failed, walk you through repair versus replacement honestly.
Repair From a Stocked Truck
Our trucks carry capacitors, contactors, fan motors, and the other parts that fail most in summer, so the large majority of AC repairs are completed on the spot.
Cooling Performance Check
We confirm a healthy temperature split across the coil, verify amp draws and charge, clear the condensate line, and watch a full cooling cycle before we leave.
How to Prevent AC Repair Problems
A few simple habits now, like regular filter changes and seasonal tune-ups, can add years to your system's life. Put these technician-approved steps to work around your property:
- Keep shrubs two feet from the outdoor unit and gently rinse its coil each spring
- Clear the condensate drain when you first turn on the AC each year
- Shade is fine, but do not box in the outdoor unit with fences or covers
- A new buzz or click at startup often means a weak capacitor, so call before it fails
- Book a professional tune-up each spring before the first heat wave finds the weak parts
- Change the filter monthly during cooling season; starved airflow is how coils freeze
- Keep supply and return vents open; closing rooms raises static pressure on the blower
DIY vs. Professional AC Repair
Some simple checks are suitable for DIY, but most heating and cooling repairs benefit from professional tools, training, and experience. Consider the following comparison:
| Factor | DIY Attempt | Professional Service |
|---|---|---|
| Refrigerant | Adding refrigerant while it keeps leaking | Leak found and fixed, then charge weighed in |
| Shock Risk | Stored capacitor charge and live 240V | Circuits tested dead before any work |
| Frozen Coils | Thawed and refrozen on repeat | Airflow or charge problem identified and fixed |
| Diagnosis | Guesswork on faults that look the same | Instrument readings, not hunches |
| Parts | Parts that are almost the right rating | Specs matched to the equipment data plate |
| Outcome | Short-lived relief | Tested and confirmed under load |
Talk to a AC Repair Expert
The sooner you call, the sooner your comfort is back. Reach Novato HVAC for fast service.
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