Most common cause: dirty filter. Check this first before calling anyone.
Could be low refrigerant or compressor issue. Here's how to tell.
Check your breaker first. If that's fine, it's likely thermostat or contactor.
Short cycling usually means dirty coils or wrong-size system.
Grinding, squealing, or banging? Each sound means something different.
Musty smell = mold. Burning smell = call immediately.
Check pilot light and thermostat batteries first.
Could be thermostat setting, filter, or ignition issue.
Complete furnace troubleshooting checklist for San Diego homes.
Heat pumps work differently. Here's what to know.
System turning on and off constantly? Here's why and what to do.
Leaky ducts waste 30% of cooling/heating. How to spot issues.
Often it's just batteries. Sometimes it's wiring.
San Diego specific concerns: dust, mold, ventilation.
The 5,000 rule and other decision frameworks for San Diego.
What's reasonable in San Diego, when to get second opinions.
What annual maintenance should cost and what's included.
Red flags every San Diego homeowner should know.
Real cost ranges for San Diego — diagnostic, repair, and replacement.
Text us. We'll help you figure out your next step — no pressure, no sales pitch.
Text 773-544-1231
Try DIY first: Changing filters, checking breakers, adjusting thermostat, cleaning around outdoor unit.
Call a pro: No cooling after filter change, strange noises, burning smells, electrical issues, refrigerant leaks.
Emergency (call now): Gas smell, electrical sparking, complete winter heating loss, smoke.