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California Lic.#1091355
ABC Service — Furnace

Furnace

Licensed HVAC Professionals
Serving the Bay Area

Licensed & insured
C-10 · C-20 · C-36
4.9 on Google
300+ verified reviews
1-hour response
Mon – Sat
Permitted & guaranteed
Clean, code-compliant work
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Not just new equipment — a system done correctly.

ABC Service technicians installing a new furnace in a Bay Area garage.
Air · Furnace

Furnace Installation

ABC Service treats furnace work as combustion engineering. Every install includes static-pressure measurement, gas pressure verification under load, combustion analysis, and CO testing — the work that determines whether a furnace actually delivers its rated AFUE.

Newly replaced high-efficiency furnace installed in a Bay Area closet.
Air · Furnace

Furnace Replacement

We install 95%+ AFUE condensing furnaces with ECM blowers — two-stage and modulating equipment from Trane, Carrier, Bryant, and Lennox. Selection is matched to load, duct capacity, and the rest of the system, not picked from a catalog.

Bay Area furnace with access panel removed during a repair diagnostic.
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Furnace Repair

The airflow side of the system is where most no-heat and short-cycle complaints actually live. We troubleshoot ignition, gas valve, inducer, pressure-switch, and limit-circuit faults, then repair returns, seal duct leakage, and match blower configuration to the actual home.

Close-up of a dust-laden furnace burner assembly during maintenance service.
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Furnace Maintenance

Annual service covers combustion analysis, filter replacement, blower verification, and safety-circuit testing. Most premature furnace failures trace back to airflow or combustion issues — both preventable with consistent service.

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Furnace
Why it matters

Why this is worth doing right.

Real efficiency

Condensing furnaces deliver 95–98% AFUE — but only when venting, gas pressure, and airflow are correct.

Combustion safety

Combustion equipment requires combustion analysis. We measure CO and O₂ on every commissioned system.

Quiet performance

ECM blowers and proper duct design eliminate the loud, full-blast cycles of older equipment.

Longevity

Most premature furnace failures trace back to airflow and combustion — both preventable with a proper install.

Manufacturers We Service

Trane logoCarrier logoLennox logoBryant logoMitsubishi Electric logoDaikin logoFujitsu logoLG logoBosch logoMidea logoGoodmanRheem logo
Our process

How a furnace project runs.

  1. 01
    Evaluate

    We assess existing equipment, loads, venting, electrical, and site constraints on-site.

  2. 02
    Design

    We size and specify equipment to the building — with options and trade-offs explained plainly.

  3. 03
    Install

    A dedicated lead tech handles a permitted, clean install with finish-grade workmanship.

  4. 04
    Commission

    We start up, balance, and verify the system against design intent with calibrated instruments.

  5. 05
    Support

    We walk you through operation, file rebates, and stand behind the system long-term.

Why ABC Service

Electrical • HVAC • Plumbing Under One Contractor

Licensed C-10 Electrical, C-20 HVAC, and C-36 Plumbing — one team, one schedule, one point of accountability.

Licensed Bonded & Insured

Fully licensed contractor, bonded, and carrying general liability and workers' comp insurance.

Same-Day Service Availability

Urgent service and safety calls prioritized with same-day diagnosis when scheduling allows.

Residential & Commercial Experience

From kitchen remodels and panel upgrades to tenant improvements and commercial equipment hookups.

Flexible financing options available.

Flexible financing options may be available for qualified customers through GoGreen Financing — HVAC, heat pumps, boilers, water heaters, electrical upgrades, and EV chargers.

FAQ

Furnace: frequently asked