Heating & Air Conditioning in Alamo, CA

Kellerman Heating & Cooling Co handles residential and light-commercial heating and cooling across Alamo and the surrounding area. From an AC that quit in a heat wave to a furnace that won't light on the first cold night, the fastest way to get help is to call — you'll reach a local technician, not a call center.

Ductless mini-splits

Single and multi-zone systems for additions, garages, and rooms that never cool right.

Furnace installation

High-efficiency furnace installs with correct venting, sizing, and thermostat setup.

AC installation & replacement

Properly sized new systems with load calculations, from value units to high-SEER equipment.

Emergency service

Urgent no-heat and no-cool calls handled fast, before small faults become failures.

AC repair

Diagnosis and repair of central air systems — warm air, weak airflow, refrigerant leaks, and electrical faults.

Thermostat installation

Smart and programmable thermostat wiring, setup, and configuration.

Heating & Cooling in Alamo, California

From coastal fog belts to inland valleys that bake all summer, California microclimates vary block by block, and systems in Alamo need to be tuned for the local pattern. Wildfire-season smoke also makes high-quality filtration and tight ductwork a real health consideration. Local providers like Kellerman Heating & Cooling Co understand these conditions and service equipment accordingly.

Common HVAC Problems in Alamo

Water around the indoor unit

Pooling water typically means a clogged condensate drain line. Caught early it is a quick fix; ignored, it can damage floors, drywall, and the air handler itself.

Frozen evaporator coil

Ice on the indoor coil chokes cooling entirely. Restricted airflow or low refrigerant are the usual causes, and running the unit while frozen risks compressor damage.

Furnace ignition failures

A furnace that clicks but will not light may have a dirty flame sensor, faulty igniter, or gas supply issue — problems best diagnosed by a trained technician.

Thermostat not matching room temperature

When rooms feel different from the set temperature, the fix may be as simple as thermostat placement or as involved as duct balancing and zoning.

Why Choose a Local California Company

Same-area service means faster response when the weather turns and equipment fails at the worst moment. Local companies live on reputation, and word travels fast in the community when work is done right. A provider who works these neighborhoods daily has seen your exact system and failure pattern before.

Seasonal Tips for California Homes

Check window and door seals — in extreme heat, every leak forces the system to fight the desert.
Clean or replace filters more often than the label says — dust loads in arid regions clog filters and coat coils quickly.
Hose down the outdoor coil monthly during dust season; a caked condenser works dramatically harder.
Protect the outdoor unit from intense sun where practical; shaded condensers reject heat more efficiently.

Frequently Asked Questions

Why is my AC running constantly in summer?

During heat waves some runtime is normal, but nonstop operation with poor cooling suggests low refrigerant, dirty coils, duct leaks, or an undersized system. A service visit can pinpoint which.

Is emergency HVAC service available?

Many local providers, including Kellerman Heating & Cooling Co, take urgent calls — a failed furnace in winter or dead AC in a heat wave should not wait. Call (925) 217-0146 to check availability.

How can I lower my heating and cooling bills?

Regular maintenance, fresh filters, a programmable thermostat, sealed ducts, and sensible temperature setbacks together typically trim 10–25% off energy use without sacrificing comfort.

Should I repair or replace my system?

A common rule: if the unit is past 12 years old and the repair costs more than a third of replacement, replacement usually wins. A technician can weigh age, efficiency, refrigerant type, and repair history for your specific unit.

Do heat pumps work in California?

Modern cold-climate heat pumps perform well across California's typical temperature range, and they both heat and cool. The right fit depends on your home's insulation and existing ductwork.