Free resources

HVAC guides you can watch.

Short video walkthroughs of the HVAC maintenance jobs every San Diego homeowner should know. Each guide comes with step-by-step instructions and a clear line on when to call a pro.

Close-up of a homeowner sliding a fresh pleated HVAC air filter into the return grille of a San Diego home

Maintenance · Featured · 3 min watch

Change your HVAC air filter

The single most common cause of 'my AC isn't cooling' calls is a blocked filter.

Watch guide

All guides

What HVAC maintenance can you do yourself?

Close-up of a white PVC condensate drain line T-cleanout on the side of a residential air handler with a bottle of distilled vinegar nearby

4 min watch

Maintenance

Clear the condensate drain line

In San Diego humidity, condensate lines clog with algae by late summer. 5-minute job.

Close-up of a homeowner's hand adjusting a modern smart thermostat mounted on a hallway wall in a San Diego home

5 min watch

Basics

Program your thermostat efficiently

A programmable thermostat saves 10–15% on heating/cooling, if you set it right.

A homeowner gently rinsing the fin coils of an outdoor AC condenser unit with a garden hose in a San Diego backyard

5 min watch

Maintenance

Clean your outdoor condenser

A dusty condenser coil can cut cooling capacity 20% and shorten the compressor's life by years.

A homeowner's hand flipping a double-pole AC circuit breaker at a residential main panel to reset it after a trip

3 min watch

Troubleshooting

Reset a tripped AC breaker safely

If the AC just quit, check the breaker panel before calling anyone.

Red flags

When should you stop and call a professional?

Six signs that the problem is past DIY. Turn the system off and pick up the phone, running a system with these issues turns cheap repairs into expensive replacements.

Ice on the refrigerant lines or indoor coil
Usually low refrigerant or airflow restriction. Running like this burns out the compressor fast, shut it off.
Burning smell, sparks, or visible smoke
Electrical issue. Cut power at the breaker and call. Don't wait.
Water dripping from ceiling vents or light fixtures
Condensate overflow. If the drip is near electrical, shut off the AC and the affected circuit.
Hissing or bubbling near the indoor unit
Refrigerant leak. The gas is not toxic in small amounts but needs certified recovery.
Loud grinding, metallic screeching, or banging from the outdoor unit
Fan bearing, compressor, or loose part. Shut it off before it self-destructs.
AC runs continuously and never reaches the setpoint
In San Diego, non-stop running on a 90°F day means undersized, low refrigerant, or leaky ductwork. A proper diagnostic finds it.

What HVAC rebates and resources are available?

SDG&E

SDG&E HVAC Rebates

Current rebates on high-efficiency equipment, heat pumps, and smart thermostats.

ENERGY STAR

Federal Heat Pump Tax Credit (25C)

Up to $2,000 tax credit for qualifying heat pump installations.

energy.gov

Department of Energy, Cooling Your Home

Basics on system types, sizing, and efficiency, written for homeowners.

EPA

MERV Rating Guide

What air filter MERV numbers actually mean and which fits your system.

Serving San Diego County

Still stuck? Call a real technician.

If the guide didn't solve it, we probably can. Flat-rate pricing, same-day service across San Diego County.

(442) 777-6440 Request a quote