An AC leaking in Los Gatos, CA almost always traces back to one of two problems: a clogged condensate drain or a refrigerant leak. One is a simple cleaning job. The other requires a certified technician and a repair plan before your system takes more damage.
Signs Your AC Needs Professional Repair
A puddle on the floor is the obvious tip-off, but it's rarely the only one. Watch for these signs together, since leaks usually show up alongside other symptoms:
- Water pooling near the indoor air handler or dripping from the ceiling below it
- Weak or warm airflow from the vents
- A hissing sound near the refrigerant lines
- Visible ice on the outdoor unit or indoor coil
- The system short-cycling or shutting off on its own
- A musty or oily smell near the equipment
If you're seeing two or more of these at once, don't wait. Ignoring either a water leak or a refrigerant leak risks flooring damage, mold, or a compressor failure that turns a repair into a full AC replacement.
What's Actually Causing the Leak?
"Leak" covers two very different failures, and they get confused often because a refrigerant leak can produce water, too. Low refrigerant causes the evaporator coil to ice over, and once that ice melts, it overwhelms the drain pan and looks exactly like a simple clog. The table below shows how to tell them apart before a technician arrives.
| Clue | Clogged Condensate Drain | Refrigerant Leak |
|---|---|---|
| Water appearance | Clear water pooling near indoor unit or dripping from ceiling | Water only after ice on the coil melts |
| Sound | Usually silent | Hissing or bubbling near the lines |
| Cooling performance | Normal until shutdown | Weak, warm air, or no cooling |
| Visible ice | Rare | Common on the coil or outdoor line |
| Smell | Musty, sometimes algae-like | Faint oily odor near fittings |
| Who can fix it | Any licensed HVAC tech | EPA Section 608 certified tech only |
Clogged Condensate Drain
Condensation forms on the evaporator coil, drips into a drain pan, and flows out through a PVC line to the exterior of your home. When algae, dust, or debris builds up inside that line, water backs up into the pan and overflows. A technician typically clears the line with a wet/dry vacuum or a drain flush, then checks the pan itself for hairline cracks that cleaning alone won't fix.
Refrigerant Leak
Hissing near the lines, visible ice on the coil, or noticeably weaker cooling point to refrigerant loss rather than a drain problem. Because refrigerant is a federally regulated substance, repairs must be handled by a certified technician. Under EPA rules, anyone who could reasonably be expected to release refrigerant while servicing an appliance must hold Section 608 certification, and the agency is explicit that certification is required for anybody who in the course of maintenance, service, or repair of an appliance could be reasonably expected to violate the integrity of the refrigerant circuit and release refrigerants into the environment . Our refrigerant leak repair technicians carry this certification, so the fix is done legally and the leak doesn't come right back.
Why Los Gatos Homes Leak More Than Flatland Homes
In our service calls across the hillside and foothill neighborhoods here, drain-line clogs show up faster than in flatter parts of the valley. Mature oak and pine coverage sheds more debris into condensate lines, and older homes closer to the hills often still run original drain pans sized for smaller systems than what's installed today. That combination means a Los Gatos AC is more likely to need its drain line serviced on a shorter cycle than the same system would in a newer subdivision. If your system is more than a decade old, it's worth checking our AC repair page for what a full inspection covers.
What Happens During a Professional AC Leak Diagnostic
Expect a structured visit, not guesswork. A typical diagnostic goes in this order:
- Visual inspection of the indoor and outdoor units
- Verification of thermostat settings and controls
- Refrigerant pressure and temperature checks
- Electrical component testing
- Airflow and drain line inspection for blockages
Free Diagnostic and Written Estimate
Many Los Gatos providers, ours included, offer a free AC diagnostic when you book a repair, so cost shouldn't keep you from getting a leak checked out before it spreads. You'll get a written estimate before any work begins, so there are no surprises on the invoice.
Parts, Warranty, and When Replacement Makes More Sense
Fixing a leak often means replacing a drain pan, adding a condensate pump, or repairing a coil or line-set section for a localized refrigerant leak. Many parts carry manufacturer warranty coverage, and labor may be covered too depending on your system's age and service history. If the coil itself is corroded or the system is older and leaking refrigerant from multiple points, replacement is usually the better long-term value than chasing repeat repairs; our team can walk you through both options during the same visit.
Is a Leaking AC an Emergency?
Light condensation on the outdoor unit during humid weather is normal and not a cause for concern. An active leak near electrical components, or a complete system shutdown during a heatwave, is a different story and counts as an emergency. Most Los Gatos HVAC companies, ours included, offer same-day dispatch for exactly this kind of situation. A minor drip with no electrical risk can usually wait for a scheduled appointment, but when in doubt, contact us and we'll help you sort out which one you're dealing with.
How to Prevent Future AC Leaks
Routine maintenance catches most leak causes before they become a mess on your floor. The U.S. Department of Energy's guidance on seasonal upkeep backs this up. Annual tune-ups are built to catch the small problems before they turn into water damage or a failed compressor, since preseason inspections may uncover leaks, rust, rot, soot, frayed wires and/or corroded electrical contacts on your air conditioner or heat pump that can lead to bigger equipment failures if left untreated . A yearly visit that includes a drain flush and coil cleaning is the cheapest insurance against another leak call. See our AC maintenance plans for what's included, or compare notes with our guide on AC freezing up in Mountain View, CA, since a frozen coil and a condensate leak often share the same root cause.
Homeowners throughout Los Gatos, CA trust Made Simple Heating and Air for this kind of work because we show up with the right certifications and explain the cause before we touch anything. Get a free estimate and we'll have a technician look at your system before the leak gets worse.
FAQ
What should I do if my HVAC system starts leaking water?
Turn the system off first to prevent electrical damage, then check your air filter for buildup. Look for an obviously clogged drain line or a cracked drain pan, and if you can't identify the cause, call a licensed technician rather than keep running the unit.
Can I still use my AC if it's leaking water?
Running a leaking AC isn't recommended. Continued operation risks electrical shorts near the unit, worsening water damage to floors and ceilings, and mold growth from prolonged moisture exposure. The CDC notes that if mold is growing in your home, you need to clean up the mold and fix the moisture problem , which starts with stopping the leak.
Is a leaking AC an emergency?
Light condensation on the outdoor unit during humid weather is normal. Water pooling indoors, dripping near electrical panels, or flooding quickly is a true emergency that warrants an immediate call.
How often should I schedule drain cleaning in Los Gatos?
Most homes benefit from annual condensate drain cleaning as part of a broader maintenance visit. Homes with older plumbing or heavy nearby foliage, which describes much of Los Gatos, may need it more often to prevent future leaks.
How much does it cost to fix an AC leak?
It depends on whether the problem is a drain clog, a cracked pan, or a refrigerant leak that needs a certified repair. The only way to get an accurate number is a diagnostic visit, which is why we offer one free with a repair booking.
