Repairs and diagnostics
Describe the loss of heat, weak cooling, unusual sound, or control problem. We evaluate the system and explain the work needed to address the findings.
HVAC repair
For a dependable heating and cooling service in Tomales, residents trust Diamond HVAC Services Inc. We provide expert solutions to keep your home comfortable year-round, from summer heat to winter chill. Schedule your service with our expert team today!
For a Tomales property, the service address and the location of the equipment are useful starting points. A home off the main road may have more than one building or heating arrangement. Tell us which space is affected and whether the request involves a furnace, heat pump, ductless unit, or specialty equipment.
Our team serves your property from Petaluma. Meet Diamond HVAC and learn about our approach to heating, cooling, and ongoing equipment care.
If an existing heater is being replaced, include any goal to add cooling. We can discuss the current distribution, the rooms you use most, and the supporting work a change may require. Different fuel or equipment options should be compared as complete projects.
Describe the loss of heat, weak cooling, unusual sound, or control problem. We evaluate the system and explain the work needed to address the findings.
HVAC repairCompare equipment with the rooms, distribution, placement, and supporting work included. Discuss both heating and cooling goals before settling on a system.
HVAC installationPlan equipment care around the system and its instructions. Ask about filter care, thermostat use, and issues that need separate repair rather than routine maintenance.
HVAC maintenanceInclude directions for the final approach and identify the building to be serviced. Photos of labels taken safely can help us discuss the work before traveling to the property, especially for wine cooler or sauna requests.
We explain the proposed scope before work begins. If you are planning an upgrade, ask about FTL Finance options, applicable equipment warranties, and what the installation includes. Availability and terms depend on the project and provider.
For recurring care, our Diamond Thermostat membership plans provide another way to discuss heating and cooling maintenance with the team.
Yes. List both items and provide separate model information. We will confirm the scope and scheduling rather than assume every type of equipment can be addressed in one visit.
Call (707) 762-7260 or use our contact form with the address, equipment type, and symptoms. Our Petaluma team will discuss the scope and confirm scheduling. A request does not automatically reserve an appointment.


Our service range also includes the air distribution and specialty systems in your home. Identify the equipment and the concern when you request a visit so we can confirm the right scope.
Browse our heating, furnace, and air conditioning services, or view the complete service directory.
Looking beyond Tomales? See Marin County coverage and all areas we serve. We also accept requests across the North Bay, Napa County, and San Francisco.
Tell us what’s happening with your heating or cooling. We’ll help you understand the next step and put together a clear estimate.