Mon–Fri 7:30AM – 5:30PM

HVAC Repair & AC Installation in Marin & Sonoma County

AC repair, installation and yearly maintenance for homes across Marin and Sonoma County. Call us when the cooling stops.

Licensed & InsuredProfessionals
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Local ExpertsSince 1986
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AC repair is the call our HVAC company gets most from Marin and Sonoma County homeowners. The house will not cool, the system runs without stopping, or the air from the vents is warm. Our HVAC repair starts by finding out what is wrong; then we explain your options and fix what can be fixed.

When a system is past repair, or a home has never had central air, we handle AC installation too. We look at the size and layout of your home and talk through central air or a ductless mini-split before you decide. Estimates on replacements and installations are free, and financing is available.

We follow the John Owens Way: maintain first, repair when needed, replace last. A yearly tune-up before summer helps catch problems early. We are a licensed, insured California contractor, license #501853. Marin homes are served from San Rafael, including Kentfield, and Sonoma County homes from Santa Rosa and Petaluma, including Rohnert Park and Glen Ellen. If your AC quits on a hot day, call us. We also handle full HVAC repair and installation, so one team covers both your heating and your cooling.

Straight answers on repair or replace

We would rather fix your air conditioner than sell you a new one. When replacement is the better choice, we show you why.

  • Maintain first, repair when needed, replace last
  • Licensed and insured California contractor, license #501853
  • Family owned and operated in Marin and Sonoma County since 1986
  • Free estimates on replacements and installations, with financing available
  • Our in-house rebate department helps you apply for qualifying utility rebate programs

When your AC is asking for help

  • Warm air blowing from the vents
  • The system runs and runs, or will not shut off
  • It switches on and off in short cycles
  • Banging, rattling or buzzing from the unit
  • Water pooling near the indoor equipment
  • Some rooms stay hot and the whole house feels humid

Frequently Asked Questions

Why is my air conditioner running but not cooling well?

Weak cooling can come from an airflow problem, a thermostat issue, dirty components or a mechanical fault. Because the causes differ so much, we inspect the system to find the real one before suggesting a repair. Call us and we will schedule a visit.

Why won’t my air conditioner turn off?

A system that keeps running may have a thermostat problem, an airflow restriction or a fault in the equipment, and it may simply be struggling on a hot day. Turn the thermostat to off and, if it keeps running, call us so we can diagnose it.

Should I repair or replace my air conditioner?

Age, repair history, performance and overall condition all matter. We explain what a repair would fix and what it would not, so you can compare it with replacement. Estimates on replacements are free, and financing is available. We explain what we find in plain terms, so you can decide what to do next.

How often should I have my air conditioner maintained?

An annual maintenance visit before cooling season is what we recommend. It helps catch wear and dirt buildup before they turn into a breakdown, and it supports reliable, efficient operation through the summer. We explain what we find in plain terms, so you can decide what to do next.

Can I add central air to a home with a furnace?

Often, yes, when the home has ductwork that can carry cooled air. It depends on the ducts and the equipment you already have. We look at both and talk through central air or a ductless mini-split if the ducts are not suitable.

Explore All Our Services

One local team for plumbing, drains, heating, cooling, water heaters, electrical work, and building repair throughout Marin and Sonoma County.

Proudly Serving Marin & Sonoma

From the Marin coast to Sonoma wine country, we bring honest plumbing, heating & cooling to homeowners across both counties — based locally since 1986.

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Serving Marin & Sonoma Counties

Good plumbing, heating, and air conditioning systems are vital in every North California home. John Owens Services, Inc. is proud to be the expert plumbing company you can count on