Almost always a drain line or condensate pump issue — here's how to tell.
Before you call for service, a few minutes of basic troubleshooting can tell you whether you're dealing with a simple fix, a safety issue that needs a professional immediately, or something in between. Here's how to read the signs correctly.
What to check first
- Check your thermostat batteries and settings first — a surprising number of 'system failures' are thermostat issues.
- Check your breaker panel and any exterior disconnect switch near the outdoor unit.
- Look for ice on refrigerant lines or the indoor coil — this means turn the system off, not troubleshoot further.
- If you smell gas near a furnace, leave the house and call your gas utility's emergency line before calling us.
Why this matters in the Central Valley
Ceres, Modesto, Turlock, and the surrounding Stanislaus, Merced, and San Joaquin County communities see a wider temperature swing between summer highs and winter lows than coastal California, and that swing is hard on HVAC equipment. Systems sized or installed for a milder climate tend to underperform or fail early here. When our technicians evaluate a system related to "why is my indoor ac unit leaking water?," we're always weighing it against what actually happens to equipment in this specific climate — not general national averages.
When to call a professional
If your troubleshooting turns up anything beyond the basics above — unusual electrical smells, water pooling near equipment, ice buildup, gas odor, or a system that won't respond to thermostat changes at all — stop and call rather than continuing to test on your own. Our diagnostic visits start with the same documented process every time: refrigerant charge, electrical readings, airflow, and (where applicable) combustion analysis, with a written report before any repair work begins.
Have a specific situation like this? Call (209) 505-0385 or schedule a diagnostic visit online and we'll give you a straight answer, in writing, before any work starts.