How do I reset my AC after a power outage?

Turn the thermostat to Off. Flip the outdoor disconnect and the indoor breaker off for 5 minutes, then back on. Wait 5 more minutes before switching the thermostat to Cool — modern compressors have a mandatory delay to prevent damage.

Why is my AC blowing warm air?

Most common causes in Phoenix: (1) thermostat set to fan-only or heat, (2) clogged filter starving the return, (3) tripped outdoor breaker, (4) frozen evaporator coil from low refrigerant or airflow, (5) failed capacitor preventing the compressor from starting. Turn the system off if the coil is frozen and call a pro.

How often should I change my AC filter in Phoenix?

Every 30–60 days during peak season, and no less than every 90 days off-season. Phoenix dust, monsoon debris, and long AC runtimes clog filters far faster than in cooler climates.

Why is water dripping from my indoor unit?

A clogged condensate drain line is the #1 cause. Try vacuuming the outdoor drain outlet with a wet-vac for 60 seconds. If leaking continues or a float switch shuts the system off, call for service — a full clean-out prevents ceiling damage.

When should I stop DIY and call a pro?

Immediately if you smell burning, see refrigerant lines heavily iced, hear grinding or hard-start banging, or the outdoor breaker trips twice. EPA-regulated refrigerant work requires a licensed technician — never top off refrigerant yourself.

AC Not Cooling? Phoenix Troubleshooting in 5 Steps

A 10-minute checklist from Phoenix's family-owned HVAC contractor. Fix the easy stuff, know when to stop and call for help — and don't damage your compressor doing either.

(602) 992-1930

Check the thermostat

Set to Cool. Setpoint at least 3°F below room temp. Fresh batteries. Fan on Auto (not On).

Replace the filter

Gray, matted, or older than 60 days = replace. A clogged filter starves airflow and can freeze the evaporator coil solid.

Reset the breakers

Flip the outdoor disconnect and indoor breaker off for 5 minutes. Restore power. Wait 5 more minutes before switching the thermostat to Cool — modern compressors need this anti-short-cycle delay.

Inspect the outdoor condenser

Turn power off. Clear leaves, cottonwood, and dust from the fins. Rinse gently top-down with a garden hose. Restore power.

Clear the condensate line

Locate the white PVC drain outlet outside. Hold a wet-vac to it for 60 seconds. Fixes most indoor drip-pan overflows and 'AC turns off after a few minutes' problems.

Stop and call a pro if…

You smell burning, see heavy ice on the refrigerant lines, hear grinding or hard-start banging, or the breaker trips twice. Refrigerant work is EPA-regulated — never DIY. Call (602) 992-1930.

AC Troubleshooting FAQ

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