The short answer
PrimeAir HVAC Repair Service serves Los Altos (94024) with AC, furnace and heat pump repair, new installations, maintenance and 24/7 emergency service. We're based about 14 miles away in Fremont and also serve nearby Mountain View, Menlo Park and Atherton.
PrimeAir HVAC Repair Service works on heating and cooling systems in homes throughout Los Altos, ZIP code 94024. Our base in Fremont is about 14 miles north, so Los Altos is a regular stop for our technicians. We handle repairs, replacements, new heat pump and ductless installations, and routine maintenance. We also offer 24/7 emergency service for the times a system quits at a bad hour.
What Los Altos Weather Asks of Your HVAC System
Los Altos sits in the Santa Clara Valley, which has a Mediterranean climate with dry summers and mild, damp winters. That pattern shapes how home systems wear out. Air conditioners do most of their work during the summer, and the inland and southern parts of the valley run noticeably hotter than areas right on the Bay. When an AC that sat idle for months suddenly has to run all afternoon, weak capacitors, low refrigerant and dirty coils tend to show up fast.
Winters rarely bring hard freezes, but the cool, damp months keep furnaces and heat pumps cycling on and off. Frequent short run cycles are hard on igniters, blower motors and thermostats. Mild winters also make Los Altos a good fit for heat pumps, which handle both heating and cooling in one system.
Heating and Cooling Repairs
If something sounds wrong, smells wrong or simply stops working, we find the cause first and explain what we found before any work starts. Common repair calls include:
Our 24/7 emergency service covers no-heat and no-cooling situations. These matter most for households with infants, older adults or anyone with health concerns.
- AC that runs but blows warm air, freezes up or trips the breaker
- Furnaces that won't ignite, short-cycle or shut off before the house warms up
- Heat pumps stuck in one mode or struggling on cool mornings
- Unusual noises from the blower, outdoor unit or ductwork
- Thermostats that don't match the actual room temperature
- Uneven rooms, weak airflow or rising energy use with no clear reason
Replacing a Furnace? Know the Bay Area Rules First
Many Los Altos homes still heat with natural gas furnaces. Under the Bay Area Air District's Rule 9-4, gas furnaces manufactured from 2029 onward must meet a zero-NOx emission standard. In practice, that points homeowners toward heat pumps when a furnace is replaced after that date.
The rule does not force anyone to tear out working equipment. The Air District appliance rules apply only when an existing furnace or water heater fails or is replaced. If your furnace is running well, a repair or tune-up may be the sensible choice for now. We will tell you plainly when a repair makes more sense than a replacement.
Water heaters follow a separate timeline. The zero-NOx date for small water heaters under Rule 9-6 was set for 2027. The Air District Board is considering amendments in November 2026 that could delay it, so check the current rule before you plan a water heater replacement.
Heat Pumps, Ductless Mini-Splits and Incentives
A heat pump replaces both a furnace and a central air conditioner, and it can often use your existing ductwork. A ductless mini-split is often the cleaner option for homes without ducts, additions, converted garages or a single room that never stays comfortable. We size each system for your house and how you use it, rather than simply matching the old equipment's label.
The federal 25C tax credit covered qualifying heat pumps placed in service before December 31, 2025. It is not available for new installations after that date. Bay Area homeowners can still check BayREN and their local clean energy provider for current heat pump and electrification incentives. Amounts and availability change by funding cycle, so we confirm the current offer before including it in any quote.
We also install central air conditioners and gas furnaces where they remain the right fit for the home.
Maintenance, Duct Cleaning and Indoor Air Quality
Seasonal maintenance is the simplest way to avoid a breakdown in the middle of summer. A spring visit before the dry season and a fall visit before the damp months let us clean coils, test electrical parts, check refrigerant and catch worn components early.
Dry summers bring dust and, in some years, wildfire smoke. Homes closed up for winter can feel stuffy. Duct cleaning, better filtration and other indoor air quality upgrades help your system move cleaner air through the house.
Serving Los Altos and Nearby Communities
Our technicians cover all of ZIP code 94024 and the surrounding area, including Mountain View, Menlo Park, Atherton, East Palo Alto and Newark. For an emergency repair or a planned heat pump upgrade, we start by taking a clear look at your current system.
ZIP codes we serve
- 94024
