1. Have Your AC Condensate Line Serviced Annually

AC condensate line clogs are the single most common cause of attic water damage we see in Phoenix, and they’re also the most preventable. Mineral buildup and algae growth inside the line accumulate over a cooling season, especially with Arizona’s hard water. Having the line flushed as part of your annual AC service, or before summer starts, significantly reduces the risk of a clog backing up into the attic.

2. Check the AC Drain Pan and Safety Switch

Most modern systems have a secondary drain pan with a float switch designed to shut off the AC if the primary line clogs and water starts backing up. If that switch is disconnected, bypassed, or the pan is cracked, that safety net doesn’t work — and you won’t get the early warning of the AC simply shutting off before real damage occurs.

3. Have Your Roof Inspected Before Monsoon Season

Monsoon season runs mid-June through September in Phoenix, and tile roof underlayment that’s degraded over years can fail during a single significant storm. A pre-monsoon roof inspection — checking underlayment condition, flashing, and any areas where wind-driven rain could find a way in — catches problems while they’re still a repair, not a restoration job.

4. Know Your Home’s Plumbing Layout

If your home has had a slab leak repaired in the past, the replacement line may have been rerouted through the attic rather than back through the slab — a common practice on post-tension slab construction. Knowing this ahead of time means you’ll recognize the risk if you ever notice a warm spot on the floor or unexplained water bill increase.

5. Do a Seasonal Attic Check

Twice a year — before and after monsoon season — a quick look through the attic access panel for discoloration, moisture, or a musty smell takes a few minutes and can catch a slow leak long before it shows up as a ceiling stain.

Frequently Asked Questions

How often should AC condensate lines be serviced?
Annually is the general guideline, ideally before Phoenix’s summer cooling season begins in earnest.

Can I check my own condensate line and drain pan?
A basic visual check for cracks or disconnection is reasonable for most homeowners, but actually flushing the line is usually part of standard AC maintenance and best left to your HVAC technician.

Is there anything specific to post-tension slab homes I should know?
If your home has had any slab leak repairs, ask your plumber whether the line was rerouted through the attic — it changes what you should watch for going forward.