Heating & cooling
AC & HVAC repair in Alamo.
Repair, installation, and tune-ups for the large multi-zone homes that define Alamo, from Round Hill to Stone Valley.
Alamo runs on big systems. The housing here is mostly estate-scale, 3,500 square feet and up, with a fair number of homes past 6,000. A house that size rarely sits on one furnace and one condenser. Most of what I service in 94507 is multi-zone: two complete systems splitting the main house, or one larger system with motorized dampers carving the floor plan into zones. That changes how a repair goes. A no-cooling call in Alamo is often a no-cooling-upstairs call, and the fault sits in a control board or a damper actuator, not the compressor.
The stock runs from 1970s Round Hill ranches to custom builds from the 2000s on Stone Valley Road. The older houses tend to hide their headaches in the framing, where refrigerant lines were routed thirty years ago and condensers were placed before anyone thought about today's landscaping. ADRIUM is owner-operated out of San Ramon, so Alamo is a short drive, and we run seven days a week.
We are EPA Section 608 Universal certified and CSLB licensed under #1136642. Every visit starts with a written, itemized quote before anyone touches your equipment. The diagnostic is $75, and it comes off the bill when you book the repair with us.
What we run on Alamo systems
We cover the full range here: AC repair, furnace repair, heat pump service, and ductless mini-split work, plus full installs when a system is past saving. Because so many Alamo homes carry two systems, we are set up to diagnose them as a pair rather than chasing one zone at a time.
Ductless is its own line of work in this town. Estate homes accumulate spaces that never had ducts, like a converted attic office, a pool house, or a guest wing built after the original HVAC was sized. We install Mitsubishi and Daikin multi-zone heat pumps for exactly those rooms, so you condition the addition without re-ducting the whole house. We are a Daikin authorized servicer trained at the Daikin factory, and we have completed Mitsubishi Electric factory training, which matters when a head throws a comms fault and the fix lives in the branch box, not the wall unit.
The faults that come up most
Control boards lead the list. On a zoned system the board talks to every damper, every thermostat, and the equipment, so when it drifts you get strange behavior: one zone overshoots, another never calls, the blower hunts. Damper actuators are the second most common, and they fail quietly because the system keeps running on the other zones.
The rule I use is to never replace a board on the first symptom. Most calls that come in as a dead board turn out to be a chewed sensor wire, a stuck damper, or a low-voltage short, and swapping the board just hides that for a few weeks. We run the diagnostics in sequence and find the actual cause before quoting parts.
The hillside houses add their own work. Crane access for a rooftop changeout off Stone Valley, line-set routing through old framing, condenser placement around mature landscaping. We scope all of that at the estimate so the install plan is settled before the equipment arrives.
Heat pump conversions and the rebates
A lot of Alamo owners are moving older properties toward heat pumps, either to drop the gas furnace or to add efficient cooling. On these larger homes the conversion frequently needs an electrical service upgrade, and I would rather tell you that at the estimate than surprise you on install day. We size the equipment to the actual load, not a rule of thumb, and on bigger jobs we can run a DOE Home Energy Score audit through BayREN to ground the numbers.
We work with BayREN, MCE, PG&E, and EBCE/Ava, plus manufacturer instant rebates. Amounts and funding vary by territory and cycle, so we confirm what is actually paying when we write your estimate.
Why owners in Alamo call us
You get an EPA-certified, licensed tech who quotes in writing before the work starts, and a $75 diagnostic that disappears when you book the repair. For homeowners who want to stay ahead of failures on two systems, our HVAC maintenance plan usually catches a tired actuator or a weak capacitor before it strands a zone in July.
HVAC is our specialty through our HVAC division, Bay Area HVAC Service, so the depth on furnaces, heat pumps, and zoning is real and not a sideline.
Common questions, Alamo.
- Do you service multi-zone and dual-system homes in Alamo?
Yes, that is most of what we do here. Many Alamo homes run two complete systems or one larger system with motorized dampers. We diagnose them together and carry replacement control boards for the major brands, so a single failed zone does not turn into a guessing game.
- How much is a service call, and is the fee waived?
The diagnostic is $75. We waive it when you book the repair with us. You get a written, itemized quote before any work begins, so there are no surprises on the invoice.
- Can you add air conditioning or a heat pump to a room that has no ducts?
Yes. We install Mitsubishi and Daikin ductless mini-splits for spaces like guest wings, pool houses, and converted offices that the original ducted system never reached. It conditions the room without re-ducting the rest of the house.
- Are you licensed and certified to handle refrigerant?
Yes. ADRIUM is EPA Section 608 Universal certified and CSLB licensed under #1136642. We are also a Daikin authorized servicer with factory training and have completed Mitsubishi Electric factory courses.
Heating & cooling