Phoenix Area Service
HVAC Drain Pans and AC Water Leak Problems
Drain pans catch condensate water near the evaporator coil and help protect the home when water forms or backs up. A rusted, cracked, overflowing, or poorly draining pan can lead to ceiling stains and water damage.
What an AC drain pan does
When warm indoor air passes over a cold evaporator coil, moisture condenses and should drain away. The drain pan catches that water and directs it into the condensate drain.
- Water in or around the indoor unit
- Ceiling stain below attic equipment
- Rusted, cracked, or overflowing pan
- Clogged drain line or float switch trip
- Frozen coil, dirty filter, and airflow problems can add water to the pan
Local service
CTS handles urgent AC repair, AC replacement, commercial HVAC, maintenance, water heaters, and related service across the Phoenix area.
480-696-5033
Drain pan problems should be checked before water spreads
A pan full of water is a symptom. The repair depends on whether the source is a clog, cracked pan, rusted pan, frozen coil, dirty coil, poor slope, or drain-line problem.
Phoenix-area HVAC service
CTS works on residential equipment, rooftops, installs, and troubleshooting calls in Arizona conditions.
Serving Phoenix, Mesa, Chandler, Gilbert, Scottsdale, Tempe, Glendale, Surprise, Cave Creek, Queen Creek, Maricopa, and nearby communities.
Water Leak Clues
What a wet drain pan can mean
A pan may hold water because the primary drain is clogged, the drain slope is wrong, the pan is rusted, the coil is freezing, or the unit is producing more water than the drain can move.
If the equipment is in an attic, a drain pan problem can show up as a ceiling stain before the homeowner sees the pan itself.
Pan Condition
Rust, cracks, slope, and overflow matter
A secondary pan should not be treated like normal water storage. If water is sitting in the emergency pan, the primary drain or equipment should be checked.
Rust, pinholes, cracked plastic, missing float switches, poor drain connections, and clogged outlets can all turn a small AC leak into a larger water-damage problem.
Water Damage Warning
Do not ignore water around indoor AC equipment
If water is active near an air handler, ceiling, drain pan, or indoor unit, turn the system off if needed and call for service before the leak spreads.
Drain Pan Calls
Common drain pan problems
Drain pan issues are part water leak, part airflow, and part maintenance.
Overflowing pan
The primary drain may be clogged or the system may be making water faster than it can drain.
Rusted pan
Rust can eventually create holes or weak spots that let water escape.
Frozen coil melt
Ice can melt into the pan and overwhelm the drain if airflow or refrigerant problems are present.
Drain Pan Photos
AC drain pan examples
Drain pan photos show why water leaks need to be traced to the source.
Standing water
Water in the pan means the drain path or equipment condition needs attention.
Coil and pan
The coil, pan, and drain all work together during cooling.
Leak evidence
Small AC water leaks can become ceiling or wall damage.
Related Drain Pages
Related drain pan and water leak pages
Drain pan problems connect to condensate drains, coil freezing, and AC water leak diagnostics.
HVAC drain pan FAQs
Answers about repair, replacement, maintenance, and service.
What does an AC drain pan do?
It catches condensate water near the evaporator coil and directs that water toward the condensate drain.
Why is there water in my emergency pan?
The primary drain may be clogged, the coil may be freezing, the pan may be rusted, or the drain setup may not be working correctly.
Can a drain pan cause ceiling damage?
Yes. An attic pan that overflows or leaks can stain drywall and damage ceilings.
Should I keep running the AC if the pan is full?
No. The source of the water should be checked before the leak spreads.
Licensed Local HVAC Service
Licensed, Bonded, and Insured
Certified Technical Services, known as CTS Air Conditioning, is a local, veteran owned HVAC and plumbing contractor. The company is licensed, bonded, and insured and has served Phoenix area homes and businesses since 2001.
Licensed for HVAC
HVAC license: ROC 328467. Licensed residential and commercial HVAC service for repair, replacement, and installation work.
Licensed for plumbing
Plumbing license: ROC 341767. Licensed residential and commercial plumbing support for water heater and other plumbing work.
Experienced HVAC service
Hands-on HVAC repair and installation experience on homes, commercial rooftops, package units, and water heater calls.
Technical terms on this page
The links below explain common HVAC terms referenced on this page. Each definition is written to help identify the part, measurement, or system condition.
Airflow | Air Handler | Coil | Condensate Drain | Drain Pan | Evaporator Coil | Float Switch | HVAC | Refrigerant
Call CTS Air Conditioning
CTS handles AC repair, HVAC service, replacement, maintenance, water heaters, and other plumbing across the Phoenix area.
480-696-5033