Repair & diagnosis
When heating or cooling changes unexpectedly, start with an evaluation of the symptoms, equipment, and controls.
Explore service
We serve homes and businesses throughout Cotati, including downtown near La Plaza Park, Old Redwood Highway, and West Sierra Avenue. Our team is based in Petaluma and can help with repairs, new installations, and regular equipment care.
For a small commercial space, operating hours and access can be as important as the equipment model. At home, the priority may be a quiet bedroom, a more comfortable living area, or getting a failed heater working again. We begin with your concern and explain the relevant options.
From getting a heater working again to planning cooling for a different room, the right service starts with your goal. Use these pages to explore the work and the questions to ask.
When heating or cooling changes unexpectedly, start with an evaluation of the symptoms, equipment, and controls.
Explore serviceCompare system options with attention to the rooms, existing distribution, placement, and project goals.
Explore servicePlan care around the actual equipment and its instructions, with repairs explained separately when needed.
Explore serviceFor a small business near La Plaza Park or Old Redwood Highway, heating and cooling should follow the occupied hours and room use. A front room, back office, and storage area do not always need the same settings. Tell us whether the complaint is a whole-system failure or a difference between spaces.
For a home near West Sierra Avenue, begin with the existing heater and whether adding cooling is also a goal. A heat pump can put both decisions in one project. We can review retained ducts, outdoor placement, electrical requirements, and the controls instead of treating the equipment choice as the complete installation plan.
Discuss your Cotati service requestLet us know whether the property has central ducts, individual indoor units, or equipment you have not yet identified. Photos of the thermostat and model label can help. If your address is near a busy downtown frontage, include parking or rear-access information so the visit can be coordinated with the site.
Our coverage also includes the broader North Bay, Marin County, Napa County, and San Francisco. If your property is outside Cotati, call with the address to discuss service.
We provide commercial HVAC service as well as residential work. Tell us the equipment type, business hours, and any access restrictions so we can discuss a suitable visit and service scope.
Yes. Tell us about both heating and cooling goals before equipment is selected. We can compare a heat pump with the existing arrangement and review the duct, electrical, placement, and control requirements.


Tell us what’s happening with your heating or cooling. We’ll help you understand the next step and put together a clear estimate.