(408) 978-3093

Furnace Tune-Up in San Jose, CA

A fall tune-up gets your furnace ready for the first cold night and checks that it burns and vents safely. Our licensed HVAC technicians clean and test the burners, ignition, heat exchanger, venting and safety controls, and tell you what they find before any extra work.

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  • Licensed C-36 · C-20 · ACSLB License #1101278
  • 1-year labor warranty24/7 service since 1986
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Goodman air handler installed on its side in an attic, with new wiring and ductwork

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Furnace Tune-Up Services We Offer in San Jose

Every tune-up covers four areas of a gas furnace. Electric furnaces and heat pumps get the checks that apply to them.

  • Burners and ignition

    Burners, flame sensor and igniter cleaned or tested, and the flame checked, so the furnace lights on the first try and stays lit.

  • Heat exchanger and venting

    The heat exchanger inspected for cracks, and the flue, vent connector and condensate drain checked so combustion gases leave the house.

  • Safety controls and gas

    Limit, rollout and pressure switches tested, gas connections checked for leaks and gas pressure measured.

  • Airflow, blower and thermostat

    Filter, blower and temperature rise checked, and the thermostat tested, so warm air reaches every room.

Signs Your Furnace Is Due for a Tune-Up

Once a year, in the fall, is the rule. Call sooner if you notice any of these.

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  • No service in over a year

    Dust settles on burners and flame sensors over the long off-season.

  • It clicks but takes several tries to light

    Often a dirty flame sensor or a weak igniter. See furnace not igniting.

  • Short cycling

    Turning on and off quickly can point to overheating, a clogged filter or a flame sensor problem.

  • Yellow flames or soot

    Poor combustion that needs attention right away.

  • Higher gas bills

    A furnace that runs longer to heat the same house is losing efficiency.

  • New noises

    Squealing, rattling or a loud boom at ignition.

A furnace tune-up is yearly maintenance that cleans and tests the parts that light, burn and vent the gas, so the furnace heats reliably all winter and runs safely. The U.S. Department of Energy advises professional maintenance every year, and ENERGY STAR suggests doing heating systems in the fall. CPI Service tunes up furnaces in San Jose and the South Bay, quoted as a fixed price before we start. Call (408) 978-3093.

What’s on Our Furnace Tune-Up Checklist

Burners and ignition

A furnace that lights cleanly and stays lit starts here. Dust on the burners and a coated flame sensor are behind many no-heat calls on the first cold night. See how a flame sensor is cleaned.

  • Inspect and clean the burners
  • Clean the flame sensor and check its signal
  • Test the hot surface igniter or pilot
  • Check the flame for a steady, blue burn

Heat exchanger and venting

These parts keep combustion gases out of your home’s air.

  • Inspect the heat exchanger for cracks and corrosion
  • Check the flue and vent connector for gaps, blockages and proper slope
  • Check the inducer motor and draft
  • On high-efficiency furnaces, clear the condensate drain and trap

Safety controls and gas

  • Test the high-limit, rollout and pressure switches
  • Check gas connections for leaks
  • Measure gas pressure at the furnace
  • Make sure the furnace shuts down safely when it should

Airflow, blower and thermostat

  • Check, clean or replace the air filter
  • Inspect the blower wheel and motor
  • Measure temperature rise across the furnace
  • Test the thermostat and its heat settings

Furnace Maintenance at a Glance (October 2026)

Task How often Who
Check the air filter Monthly in heating season (ENERGY STAR) You
Professional tune-up Once a year, in the fall (DOE, ENERGY STAR) A licensed HVAC technician
Gas connections, gas pressure, burners and heat exchanger At every tune-up (ENERGY STAR) A licensed HVAC technician
Keep the area around the furnace clear All year You

Why Homeowners Choose CPI Service for Furnace Tune-Ups

Since 1986, CPI Service has served homeowners in San Jose and the surrounding cities.

  • CSLB License #1101278 (C-20 HVAC, C-36 Plumbing)
  • BBB A+ Accredited Business
  • Up-front pricing: any repair is quoted as a fixed price before work starts
  • A 1-year labor warranty on our work
  • Same-day service when the schedule allows, and 24/7 emergency service for no-heat calls

Tune-Ups and Service Plans

A service plan takes care of the yearly visit for you. The Gold HVAC plan ($15.99 a month) and the Platinum plan include annual HVAC maintenance for one system, priority scheduling, a waived diagnostic fee and a loyalty discount. Platinum members also get 20% off HVAC repairs done during the maintenance appointment. Plan visits are scheduled off-season (outside June to August and October to November), so a plan furnace visit falls in September or from December on. Read more in what an HVAC maintenance plan covers.

Between Tune-Ups

  • Check the filter monthly while the heat is on, and replace it when it looks dirty.
  • Keep storage, paint and cleaning products away from the furnace.
  • Keep supply and return vents open and unblocked.
  • Keep working carbon monoxide alarms in the home, and test them as the maker recommends.
  • If you smell gas, leave the house and call PG&E or 911 from outside. For a furnace that won’t light or keeps shutting off, see furnace repair.

We tune up furnaces throughout San Jose and the South Bay.

Sources

Checked October 2026.

How Much Does a Furnace Tune-Up Cost in San Jose?

A furnace tune-up in San Jose is quoted as a fixed price before we start. If a part fails its test, we price the repair before doing it; common ones are below. Annual HVAC maintenance is included with our Gold HVAC and Platinum service plans.

Typical furnace tune-up prices in San Jose, installed, in US dollars. Checked October 2026.
ServiceTypical San Jose price (USD)
Furnace tune-up, one system$100–$200
Flame sensor, if it fails the test$150–$350
Igniter, if it fails the test$200–$450
Pressure switch, if it fails the test$250–$500
Inspection feeWaived for service plan members$59

What affects the price

  • Furnace type. Standard and high-efficiency (condensing) furnaces have different parts to check; condensing models add a condensate drain.
  • Number of systems. Homes with two furnaces can have both done on one visit.
  • Location. Attic and crawlspace furnaces take longer than one in a closet or garage.
  • Condition. A furnace that hasn't been serviced in years may need more cleaning.
  • Repairs found. Sensors, igniters, switches and motors are priced as repairs, and we ask before doing them.

Most repairs are quoted as a fixed price before we start. Ranges are typical for San Jose and the South Bay and don't include current specials.

Read the furnace repair cost guide →

How Our Furnace Tune-Up Works

  1. Book your visit

    Call or book online. Early fall is best, before the first cold snap fills the schedule.

  2. Inspect the furnace

    The technician checks the filter, burners, ignition, heat exchanger, venting and thermostat, and watches a full heating cycle.

  3. Written price for anything extra

    If a part fails its test, you get a written price and decide before we go ahead.

  4. Clean and adjust

    Burners and flame sensor cleaned, filter changed or cleaned, connections tightened and controls set.

  5. Safety test

    We check combustion, gas pressure, venting, temperature rise and every safety control.

  6. Report and cleanup

    You get a summary of the furnace's condition, tips for the season, and a clean work area.

Furnace Tune-Ups in San Jose

What matters for keeping a South Bay furnace in shape.

  • Schedule in early fall

    ENERGY STAR advises checking heating systems in the fall, before contractors get busy. Mild San Jose winters still have cold nights when a furnace that won't light is a real problem.

  • Service plan timing

    Plan maintenance is scheduled off-season, outside June to August and October to November. For a furnace, that means September, or December onward.

  • Attic furnaces

    Many ranch homes have the furnace in the attic, where a clogged filter or condensate line shows up as overheating or a leak.

  • The Air District rule

    Under Rule 9-4, furnaces manufactured after January 1, 2029 must be zero NOx. A working furnace never has to come out early. See our zero-NOx rules guide.

  • Heat pumps and rebates

    If your furnace is old, a tune-up is a good time to price a heat pump. San José Clean Energy's EcoHome Rebate covers qualifying systems.

Neighborhoods we serve: Downtown San Jose · Willow Glen · East San Jose · South San Jose · Evergreen · Cambrian Park · West San Jose · Berryessa · North San Jose · Blossom Valley

Current Specials

Save on your visit. Mention the offer when you book.

What Our Customers Say

Google 4.9 from 130+ reviews: read more →See photos of our work →

  • Our new heat pump system has just been installed and we are very pleased with CPI and the new equipment. We are especially grateful for the knowledgeable and hard-working technician Bunhak, who worked throughout our recent heatwave to finish the job. We would highly recommend CPI for any HVAC installation or maintenance.

    Linda G.Google review

  • CPI and Alex were extremely helpful when our local church’s water heater kept malfunctioning and needed replacing. From the initial diagnosis, explanation and recommendation of replacement, we always felt that our needs were being tailored to. Not only were they extremely kind, knowledgeable and professional, but they also were diligent and efficient during their time.

    We’re truly grateful for their excellent work and would highly recommend CPI to anyone in need of plumbing or heating services, especially for those in larger community buildings like churches like ours.

    Stephen S.Google review

  • CPI Service is a great company to use for HVAC too! Our A/C stopped working during the recent heatwave & another company wanted to replace our whole unit. Then we called CPI & they found it didn’t need to be replaced, they fixed it that day! I really appreciate a company that responds quickly, is very professional & reasonably priced!!! I’ll be using them for sure in the future.

    Jaycee V.Google review

Furnace Tune-Up FAQs

What is a furnace tune-up?

Annual maintenance for your furnace: we clean and test the burners and ignition, inspect the heat exchanger and venting, test the safety controls and check airflow, so it heats reliably and burns safely.

What does a furnace tune-up include?

Checking or replacing the filter, cleaning the burners and flame sensor, testing the igniter, inspecting the heat exchanger for cracks, checking the flue and vent, testing the limit, rollout and pressure switches, checking gas connections and gas pressure, measuring temperature rise and testing the thermostat.

How much does a furnace tune-up cost in San Jose?

We quote it as a fixed price before we start. Parts that fail testing are priced separately before any work: typically $150 to $350 for a flame sensor and $200 to $450 for an igniter.

How often should a furnace be serviced?

Once a year. The U.S. Department of Energy advises professional maintenance for your furnace or heat pump every year, and ENERGY STAR suggests doing heating in the fall.

Does a service plan include the furnace tune-up?

Yes. Our Gold HVAC and Platinum service plans include annual HVAC maintenance for one system, scheduled off-season (outside June to August and October to November). More systems can be added during the appointment for a small fee.

Does a tune-up check for carbon monoxide?

We check combustion and venting, which is where carbon monoxide problems start, and inspect the heat exchanger for cracks. Keep working carbon monoxide alarms in the home too. If an alarm sounds, get everyone outside and call 911.

What can I do between tune-ups?

Check the filter monthly during heating season and replace it when it's dirty, keep the area around the furnace clear, and keep supply and return vents open. Leave the gas parts to a technician.

Helpful Guides

Serving San Jose and the South Bay

Our shop is at 2880 Aiello Dr in San Jose. We provide furnace tune-up across the city and nearby South Bay and Peninsula communities. See our full service area.

Content and prices reviewed October 2026.

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