Ducts & Air Quality

Zoning Systems

Separate temperatures for upstairs and downstairs with dampers and multiple thermostats.

Ductwork Installation & Repair

Crushed, leaky or undersized ducts repaired, sealed or replaced.

Smart Thermostats

Thermostat repair, replacement and smart thermostat setup that actually works with your system.

Air Filtration & Air Quality

Better filters and media cabinets for dust, allergies and wildfire smoke.

Troubleshooting

AC Frozen? Ice on the Lines or Coil: Causes and Fixes

An AC freezes when the indoor coil gets too cold, usually from low airflow (dirty filter, closed vents, weak blower) or low refrigerant from a leak. Turn cooling off and run only the fan to thaw it, replace the filter, and if it freezes again, call a technician to check airflow and refrigerant.

Troubleshooting

AC Not Turning On? 6 Causes and Easy Checks

When an AC will not turn on, start with the thermostat (mode, setpoint, batteries), then the breakers, the outdoor disconnect, and the condensate float switch. If power and settings are fine and nothing starts, the problem is likely a failed control board, transformer, capacitor, or contactor, which a technician should test.

Troubleshooting

AC Runs Constantly but House Stays Hot? 7 Reasons

An AC that runs all day without reaching the setpoint is usually short on airflow (dirty filter or coil), losing cold air through leaky ducts, low on refrigerant from a leak, or simply too small for the heat load. On very hot days some long run time is normal, but if it never catches up in mild weather, have it checked.

Troubleshooting

Heat Pump Blowing Cold Air in Heat Mode? Causes

A heat pump that blows cool air in heat mode may simply be in defrost mode, which is normal and lasts a few minutes. If it blows cold air for a long time, check the thermostat mode and filter, then call a technician for possible reversing valve, defrost control, or refrigerant leak problems.

Troubleshooting

AC Smells Bad? Burning, Musty or Dirty Sock Smell

A musty or dirty sock smell usually comes from mold or bacteria on the indoor coil, drain pan, or ducts. A burning or electrical smell can mean an overheating motor or wiring and is urgent: turn the system off at the thermostat and the breaker, and call a technician. A rotten egg or gas smell means leave the house and call SoCalGas or 911.

Troubleshooting

AC Short Cycling? Turns On and Off Every Few Minutes

An AC that turns on and off every few minutes is short cycling. Common causes are a thermostat in a bad spot, a clogged filter, a frozen coil, a tripped float switch, an oversized system, or an electrical or refrigerant problem. Check the thermostat and filter first. If it keeps cycling, have a technician test it, because short cycling wears out the compressor.

Troubleshooting

Thermostat Blank or Not Responding? Causes and Fixes

A blank thermostat usually has dead batteries, lost power from a tripped breaker or switch, or was shut off by a tripped condensate float switch. It can also be a blown fuse on the control board or a failed transformer. Replace the batteries and check breakers and the float switch first. If it is still blank, a technician should test the low voltage power.

Troubleshooting

High Electric Bill in Summer? Why Your AC Runs Too Much

A high summer electric bill usually means the AC is running longer than it should. Common causes are a dirty filter or coils, leaky ducts in a hot attic, a low setpoint, poor attic insulation, a refrigerant leak, or an old, inefficient system. Start with the filter, thermostat schedule, and outdoor coil, and have the system checked if run time is still high.

Troubleshooting

Upstairs or One Room Hotter Than the Rest? Causes

Upstairs rooms and rooms over a garage often run hotter because heat rises, the attic above them gets very hot, and their duct runs are longer. Weak airflow from leaky or crushed ducts, closed vents, a dirty filter, or a single thermostat downstairs make it worse. Open vents and change the filter first. Lasting fixes include duct repair, balancing, and zoning.