San Jose HVAC Pros repairs, replaces and maintains the equipment that heats and cools San Jose homes: gas furnaces, central air conditioners, heat pumps, ductless mini-splits, thermostats, ductwork and air-cleaning equipment. We also work on commercial systems, including rooftop units. A technician finds the cause before anything is replaced, you approve the price before work starts, and urgent calls are taken 24/7. We have worked in San Jose since 2009 and are licensed, bonded and insured.
Start from what the system is doing
Most calls begin with a symptom, not a part name. This table matches what you notice to the usual causes and the page that covers it.
| What you notice | What it often points to | Where to start |
|---|---|---|
| The furnace fan runs, but the air is cool | Thermostat fan set to On, an ignition or flame-sensor fault, a gas supply problem, or a limit switch tripping behind a clogged filter | Furnace repair, furnace not heating |
| The furnace clicks, tries to light and gives up | Igniter, flame sensor or a pressure switch | Furnace not igniting |
| The AC runs, but the house stays warm | A dirty filter or outdoor coil, a failed capacitor or fan motor, low refrigerant from a leak | AC repair |
| The AC will not start at all | A tripped breaker, the thermostat, a failed capacitor or contactor, or a float switch shutting it off because the drain is blocked | AC not turning on |
| The system starts and stops every few minutes | Oversized equipment, a dirty filter or frozen coil, low refrigerant, a badly placed thermostat | AC short cycling, furnace short cycling |
| The outdoor heat pump is caked in ice and stays that way | A defrost fault, low airflow or low refrigerant (light frost that clears on its own is normal) | Heat pump repair, heat pump freezing |
| A wall-mounted unit drips water or flashes a code | A blocked drain line or pump, dirty filters or coil, a sensor or communication fault | Mini-split repair |
| The thermostat is blank or ignores the setting | Dead batteries, a blown low-voltage fuse, a tripped safety switch, loose wiring | Thermostat not working |
| Dust, stale air or allergy symptoms indoors | A dirty filter, leaky return ducts drawing in attic air, no real filtration | Poor air quality, air purification |
| An aging system that needs a repair every season | Wear across the whole system, not one part | AC installation, furnace installation, heat pump installation |
| No heat or cooling at night, on a weekend or in a heat wave | Anything above, at a bad time | Emergency HVAC |
Some of these have checks you can safely do yourself first, such as the filter, the thermostat mode and the breaker. The HVAC problem guides say which ones, and when to stop and call.
What we work on
- Cooling: AC repair, AC installation and AC maintenance, plus mini-split installation and mini-split repair for rooms the ducts never reached.
- Heating: furnace repair, furnace installation, furnace maintenance, and heat pump installation and repair.
- Indoor air: air purification, air duct cleaning and humidifier installation.
- Everything else: emergency HVAC, maintenance plans, thermostat installation, commercial HVAC and rooftop unit service.
Each service is described in full on the services page.
Why cooling is the hard job here
San Jose summer afternoons are hot and dry, often in the 80s and 90s and hotter on the warmest days, while winters are mild with cool nights. The valley floor runs warmer than the neighborhoods along the foothills. So the air conditioner or heat pump does the heavy lifting: it runs long hours through the summer, ducts in the attic sit in the heat, and an older, leaky duct system loses part of its cool air before it reaches the rooms. When a house moves to a heat pump or gets cooling for the first time, the capacity of the electrical panel can matter as much as the equipment itself.
How a visit and the pricing work
- Call or book online. Call (650) 397-7060 or use the Book online button and describe what the system is doing. Same-day service is available for most calls received before noon, and urgent calls are taken 24/7.
- Diagnosis first. The technician tests before replacing anything: the filter and airflow, voltages and capacitors, the burner and safety switches on a furnace, and refrigerant pressures on an AC or heat pump when the readings point there.
- An upfront price. You see the price and approve it before work starts, with no hidden fees. For repairs a diagnostic fee applies, and it is waived if you go ahead with the work.
- The work, then a full cycle. After the repair the system is run through a heating or cooling cycle and checked. We stand behind our work with a 100% satisfaction guarantee.
New and replacement systems. Estimates for new installations and replacements are free. A sound estimate starts with the house, not with the size printed on the old unit: rooms, insulation, windows and sun decide the capacity, the condition of the ducts decides whether they can stay, and the electrical panel decides what a new AC or heat pump will need. You get the options and their prices before you decide. Typical ranges for common jobs are in the cost guides.
One city, very different houses
San Jose’s neighborhoods were built in different decades, and the house shapes what a heating and cooling system needs.
| Neighborhood | The homes | What it means for the system |
|---|---|---|
| Willow Glen | Older homes under a mature tree canopy | Vintage ductwork and thin insulation; modern comfort added without changing the character of the house |
| Rose Garden | Older, often larger homes with original woodwork and big rooms | Zoning, and cooling added without harming the house |
| Cambrian | Many homes around 60 years old | Original systems and leaky ducts |
| Blossom Valley | Original equipment that is now around 40 years old | Warm summers and high cooling bills |
| Almaden Valley | Many larger homes, some over 3,000 sq ft | A warmer valley floor and cooler hillsides; energy costs and whole-house air cleaning |
| Santa Teresa | South San Jose homes near the hills | Variable microclimates; careful sizing and smart thermostats |
| Evergreen | Many tract homes in the East San Jose foothills | Builder-grade equipment reaching replacement age; correct sizing |
| Berryessa | A mix of housing types and building ages | Very different systems from one street to the next |
We also work in Downtown San Jose, North San Jose, West San Jose, Silver Creek and Japantown. Every neighborhood is on the service area page.
Costs, brands and further reading
- What things cost: the cost guides cover common jobs, for example AC repair cost and mini-split installation cost.
- Choosing equipment: we are independent and work on the major brands. The brand comparisons, such as Bryant vs Carrier and Rheem vs Trane, explain what actually differs between them.
- Before you call: the problem guides cover the safe checks for common failures.
- Owner know-how: the blog explains how often to replace an HVAC filter, how to weigh repair against replacement and what works in older homes.