Los Altos AC, Furnace and Heat Pump Service

Los Altos homeowners in 94024 tend to call us with one of two questions. Either something has stopped working and they want it fixed today, or the system is getting old and they want to know what comes next. ReliableAir HVAC Services drives the roughly 9 miles west from San Jose to answer both. We repair air conditioners and furnaces, install heat pumps, ductless mini-splits and new AC or furnace systems, and handle maintenance, duct cleaning and indoor air quality across the city and the Santa Clara County neighborhoods around it.

Repair first, then the bigger conversation

A lot of Los Altos houses have been remodeled more than once, and the heating and cooling equipment often dates from one remodel while the ducts date from another. When something breaks, our first job is to get the system running and find out why it failed. A failed blower capacitor is a simple swap. A cracked heat exchanger or a compressor that has lost its windings is a very different situation.

Once the immediate problem is handled, we give you a plain read on the rest of the system: how old it is, what condition the major parts are in, and whether more failures are likely soon. You decide what to do with that information. Some people prefer to keep a sound older furnace running for years; others would rather plan a replacement on their own schedule than wait for a mid-winter breakdown.

What replacement looks like now

The rules around gas heating in the Bay Area are changing. Under Air District Rule 9-4, natural gas furnaces manufactured from 2029 must meet a zero-NOx emission standard. For most households that means a heat pump becomes the practical choice when a furnace is replaced after that date. The Air District does not require anyone to pull out equipment that still works, so a healthy furnace can stay.

If you are replacing now, a heat pump is worth comparing against a new furnace and AC pair. It handles both seasons with one outdoor unit, and in a climate with mild, damp winters it rarely faces the kind of cold that strains the equipment. The federal 25C tax credit is no longer available for installations after 2025, but BayREN and local clean energy providers may offer incentives. We check the current offer before putting any number in writing.

• Heat pump replacing both furnace and AC on existing ducts
• New high-efficiency furnace paired with a matched AC coil
• Ductless mini-splits for additions or rooms off the main system
• Hybrid setups that keep a working furnace as backup

Comfort problems that are really duct problems

Hot bedrooms in July and cold family rooms in January are common complaints, and new equipment does not always cure them. In homes with additions, the original ducts were sized for a smaller footprint, and the new rooms are fed by a long branch that barely moves air. Attic ducts lose heat and cooling through torn insulation and loose joints.

We measure airflow at the registers and pressure in the system to see where the air is actually going. Sealing, re-routing or adding a return can change how a house feels without touching the furnace. When that is not enough, a single ductless head in the problem room is often the simplest answer.

Keeping the air inside clean

Dry summers bring dust and pollen, and some seasons bring wildfire smoke drifting into the valley. A properly sized media filter, sealed return ducts and a blower set to the right speed do much of the work. For homes with allergy concerns, we can talk through upgraded filtration and ventilation that suits your system. Duct cleaning makes sense after a remodel or when there is visible buildup, and we will tell you if yours does not need it.

ZIP codes we serve

• 94024

Services in Los Altos

• AC Repair in Los Altos
• Heating Repair in Los Altos
• Heat Pump Installation in Los Altos
• AC Installation in Los Altos
• Furnace Repair in Los Altos

Nearby areas

• Los Altos Hills
• Mountain View
• Palo Alto
• Sunnyvale
• Cupertino