Why is our upstairs so much warmer than downstairs?

Warm air rises, upstairs ducts often run through the attic, and the return path from the bedrooms may be too small. A system can be the right size and still cool unevenly. We measure the supply and return on each floor and show you where the air is going before quoting any change.

Do you work in Hercules by the Bay and Village Park?

Yes, and across the rest of Hercules, from the Gemstones and the Islands to the Waterfront. When you book, tell us whether your system is a furnace with a condenser, a heat pump or a ductless unit.

What refrigerant work can you do on our Hercules system?

All of it. ADRIUM holds EPA 608 Universal certification for recovery, leak repair, evacuation and charging. A system that is low has a leak, so we find it with nitrogen and a detector before any refrigerant goes back in, and quote the repair in writing.

AC REPAIR · HERCULES

AC Repair · Hercules, CA

AC repair for Hercules two-story homes, where the upstairs bedrooms run warmer than the rooms below.

$99 diagnostic (credited toward the repair)
Same or next-day best effort
CSLB #1136642

Call (925) 999-4095

AC Repair in Hercules

AC Repair in Hercules.

Hercules is dominated by two-story homes, detached and attached. Most sit in the 1970s and 1980s subdivisions inland along Refugio Valley Road, and the rest in newer neighborhoods such as Olympian Hills and Victoria by the Bay, the latter built in the early 2000s. The climate is mild, so an air conditioner here is judged less by raw capacity than by how evenly one system cools two floors.

Warm air rises, upstairs supply ducts often run through a hot attic, and one central return is a common layout. Put those together and the bedrooms stay warm while the living room gets cold. Our technician serving Hercules works from a base in Benicia. We measure before recommending anything, and the $99 diagnostic is credited toward the repair.

Common repairs we handle.

Upstairs bedrooms that never cool. We measure airflow at the upstairs registers and the temperature drop across the coil, then check the attic runs for crushed or disconnected duct. Sometimes the answer is a damper setting or a second return. A bigger condenser rarely fixes it.
Zone damper stuck in a two-story home. Some two-story homes have a zoned system with dampers in the ducts and a thermostat on each floor. When a damper motor fails, one floor gets all the air. We drive each damper from the zone panel, confirm it moves, and replace the failed actuator.
Attic air handler dripping through the ceiling. When the air handler sits in the attic, a clogged condensate line can overflow the pan and stain the ceiling below. We clear the primary line, check the secondary pan and its safety switch, and make sure the system shuts down before water reaches the drywall next time.
Condenser short-cycling on a mild day. A unit that starts, runs briefly and stops can have a failing capacitor, a high-pressure trip from a dirty coil, or a thermostat mounted where the sun hits it. We check each in turn and log the pressures, so the cause is written down rather than guessed.

Pricing and warranty

What it costs. What we stand behind.

$99

Diagnostic visit. Credited toward the repair.
1 yr

Parts and labor warranty on completed repairs. In writing before we start.
CSLB

#1136642. Bonded and insured. We file warranty paperwork when applicable.

Nearby cities

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FAQ

AC Repair in Hercules questions, answered.

Why is our upstairs so much warmer than downstairs?

Warm air rises, upstairs ducts often run through the attic, and the return path from the bedrooms may be too small. A system can be the right size and still cool unevenly. We measure the supply and return on each floor and show you where the air is going before quoting any change.
Do you work in Hercules by the Bay and Village Park?

Yes, and across the rest of Hercules, from the Gemstones and the Islands to the Waterfront. When you book, tell us whether your system is a furnace with a condenser, a heat pump or a ductless unit.
What refrigerant work can you do on our Hercules system?

All of it. ADRIUM holds EPA 608 Universal certification for recovery, leak repair, evacuation and charging. A system that is low has a leak, so we find it with nitrogen and a detector before any refrigerant goes back in, and quote the repair in writing.

Pricing HVAC repair starts with a $99 diagnostic, credited toward the approved repair, which makes the service call $0 with a completed repair. Considering a new HVAC system? The in-home estimate visit is free.

Credentials Owner-operated by Andrew · CSLB #1136642 · EPA #1279674151528 · BBB A+ · Repairs carry a 1-year warranty; new-system coverage: 10 years manufacturer parts + 2 years labor. Warranty and callback details →

Need ac repair in Hercules?

Tell us what is broken. We will quote it.