When the heat stops working on a cold night, or the house won't cool down no matter what the thermostat says, the problem is rarely obvious from the outside. A system that runs but does nothing, a unit that won't start at all, or rooms that feel like a different climate from the rest of the house each point somewhere different. You do not need to know what is wrong before you call. Describe what the system is doing, and we will help you figure out the next step from there.
We cover the full range of heating and cooling work in Cotati, from a single-room comfort problem to a complete system replacement. Homes in a town this size tend to carry a mix of equipment ages and configurations, and the work reflects that. Older systems that have never been serviced, ductwork that was never quite right for the layout, and first-time cooling installs in homes built before AC was standard are all calls we handle regularly.
Call (707) 892-4623 to get a quote and schedule a visit.
Replacing a whole HVAC system is a bigger decision than a repair call, and the process is staged differently. Before anything is scheduled, the job is scoped to match the equipment to the building. That means working through the heating and cooling load for the space, not simply swapping in the same size unit that came out. A system sized to the actual load runs more efficiently and holds temperature more consistently than one chosen by habit or by what fit the opening.
The equipment selection conversation covers the type of system, the fuel source, and whether the existing ductwork can support what is going in. For homes moving from gas to a heat pump, or adding cooling for the first time, those decisions change what the installation involves. The scope is confirmed before anything is scheduled, and the price is given before the work starts.
Most full system replacements are completed in a single day, though a more complex job may run longer depending on access and configuration. The property is without heating or cooling for the duration of the installation, so scheduling around the weather or around a tenant's situation is worth talking through on the call. Before sign-off, the thermostat is confirmed as communicating with the new system, and the controls are walked through with whoever is on site.
A repair that does not last is frustrating, and calling back about the same problem is not how anyone wants to spend their time. When we take over work that was started by someone else, or when a fault has come back after a prior visit, the diagnostic starts from scratch rather than from the last technician's notes. What was replaced last time is useful context, but it does not tell us what is actually happening now.
Second opinions are a normal part of this trade. If you have been told a system needs to be replaced and you are not sure that is right, a separate diagnostic is a reasonable step before committing to that cost. We will tell you what we find. If the previous assessment was correct, we will say so. If the repair is viable, we will scope it and price it. The repair or install scope is priced before the work starts, so you know what you are agreeing to before anything is touched.
A heat pump that loses heating capacity in mild weather, or one that is running but not producing the warmth the thermostat is calling for, is often dealing with a refrigerant issue or a defrost cycle fault. In a region where heat pumps are the standard answer for year-round comfort, a unit that ices up or fails to reverse into heating mode properly is worth diagnosing carefully rather than replacing on assumption. We work through the refrigerant pressure, the reversing valve, and the defrost controls before drawing a conclusion.
A coil that has built up enough debris to restrict airflow will cause the system to underperform in ways that look like refrigerant loss or a failing compressor. Cooling that drops off gradually, ice forming on the indoor unit, or an air handler that runs but moves very little air are all situations where the coil is the first thing to check. Cleaning and repair are priced separately depending on what the inspection finds.
Whole-home humidity control connects directly to the air handler and works with the existing duct system. In a coastal region where damp winters and dry summer stretches can both affect comfort, a humidity imbalance shows up as condensation on windows, wood that swells or cracks, or a space that never feels quite right even when the temperature is correct. Installation involves confirming compatibility with the air handler before anything is specified.
A room that is always too warm or too cold while the rest of the house is comfortable is rarely a thermostat problem. Duct leakage, a damper that has failed in a closed position, or a zoning configuration that was never set up correctly are more common causes. We diagnose the air distribution system as a whole rather than adjusting controls and hoping the symptom goes away.
An AC that will not start is one of the more straightforward diagnostic calls, because the system either starts or it does not. The visit works through the electrical components at the unit, the capacitor, the contactor, and the control board, along with the signal from the thermostat. Most no-start faults are found and priced in a single visit. If the fault points to a compressor failure in an older unit, we will give you a clear picture of whether repair or replacement makes more financial sense.
Homes in and around Cotati vary in age and in what was installed when they were built. An older home on its original equipment is not automatically a problem, but it does mean the diagnostic covers more ground. A heat exchanger that has not been inspected in years, ductwork that was sized for a system no longer in place, and controls that predate modern communicating thermostats all add context to what the visit involves. We scope each job based on what is actually there rather than on assumptions about age.
Properties outside the town center, on larger lots or down longer driveways, do not present a coverage problem. What they sometimes present is an access consideration worth mentioning on the call. If the equipment is in a location that affects how the visit is staged, describing it when you book means the visit is prepared for it. That applies to attic-mounted air handlers, rooftop units on small commercial buildings, and outdoor units in locations with restricted clearance.
HVAC pricing moves with what the job actually is. A no-start diagnostic on a central AC unit is a different scope from a full heat pump replacement, and duct sealing on a single run is different from a whole-house duct repair. The things that shift a quote are the fault itself, what has to be accessed to reach it, the parts the repair requires, and whether a repair or a replacement is the more practical answer given the system's condition.
When you call, we talk through what the system is doing and what the visit will cover. The price is given before any work is authorized, and nothing is added without your knowledge. If the diagnostic finds something that changes the scope, we explain what was found and confirm the updated price before proceeding. Ask what the visit covers and you get a straight answer.
We are available every day from 7:30 AM to 10:00 PM, and that covers both planned visits and emergency calls. When the heating or cooling is completely out, we take those calls on the same basis as any other. The diagnostic covers the full system before any repair is quoted, and the price is confirmed before the work starts.
For tenants and businesses that need to stay open, scheduling is worth talking through on the call. We can discuss what the current availability looks like and confirm a time that works around the property's situation. For planned work, booking ahead of the season is the practical move. A tune-up scheduled before the first heat stretch of the year, or a furnace check before the cold months arrive, avoids the wait that comes when everyone calls at once. Give us a call and we will take care of it. Have a look at the services page for the work broken down.
We serve Cotati and the communities around it throughout Sonoma County. Nearby towns we cover include Rohnert Park, Penngrove, Bloomfield, and Petaluma. If your property is in Cotati or anywhere in the surrounding area and you are not sure whether your address falls within our coverage, call and ask.
We can discuss timing on the call and work around the tenant's situation where possible. For a repair visit, the tenant does not need to be home as long as access to the equipment is arranged. For a full replacement, the property will be without heating or cooling for the duration of the installation, so coordinating with the tenant in advance is worth factoring into the schedule. Describe the property setup when you call and we will confirm what the visit involves.
A maintenance visit covers the components most likely to affect system reliability and performance. For cooling, that includes the refrigerant charge, the coil condition, the condensate drain, the electrical connections, and the airflow through the system. For heating, it covers the ignition components, the heat exchanger condition, the burner operation, the blower, and the filter. We confirm what the visit includes when you call.
No heat in freezing conditions, no cooling during an extreme heat event, a system that is producing a burning smell or unusual electrical sounds, or a system that has completely stopped and cannot be restored by checking the thermostat and the breaker are all situations that justify an emergency call. We take those calls every day from 7:30 AM to 10:00 PM.
Call us at (707) 892-4623 and describe what is happening.
It is a good idea to keep pets away from the areas where the technician is working, both for the pet's safety and to allow the work to proceed without interruption. For outdoor unit work, keep pets indoors or away from the area around the condenser. Let us know if there are any concerns when you call.
Call us to discuss how billing is handled across multiple properties. We work with landlords and property managers on a regular basis and can confirm what invoice arrangements are possible for your situation. The conversation about billing happens when you call to set up the service.
If the component is compatible with the system and is functioning correctly, there is no reason to replace it. We assess what is installed during the diagnostic visit and recommend changes only where they are warranted. We do not replace parts that do not need replacing.
For a home with no existing ductwork, a ductless mini-split system is usually the most practical path. It conditions individual zones without requiring new duct runs, and the installation is completed without major structural work. For homes that do have ductwork in reasonable condition, adding a central cooling system to the existing air handler is a straightforward alternative. We scope both options on the call and explain which fits the property based on what is already there.
A system that runs without complaint can still be carrying a fault that only shows up under the sustained load of peak heat or a hard freeze. Scheduling a tune-up or a diagnostic visit before the season changes is how most equipment problems get caught before they become an emergency call.
Call Windsor HVAC Company at (707) 892-4623 to get a quote or book a visit. We'll get your home comfortable again fast.
Close by, we also take heating and cooling work in: Rohnert Park, Petaluma, Sebastopol, Larkfield-Wikiup.
Have a look at our full area list.
From a quick repair call to a full system replacement, we cover the heating and cooling work that Cotati and Sonoma County homes actually need. The list below breaks down each service by what it covers, who it fits best, and a practical note worth knowing before you call. If you have a question about a specific situation, call us and we will talk through what makes sense for your home or building.
| Service Type | What the Service Includes | When You Need It | Helpful Details |
|---|---|---|---|
| First-Time AC & Ductless Cooling Installation |
| Homes built without central air conditioning that are adding cooling for the first time | A home with no duct system, or with ducts not worth extending, is often a better fit for a ductless mini-split than for a new central system. |
| Seasonal Maintenance & Tune-Ups |
| Homeowners and property managers who want to catch small problems before they become emergency calls | For landlords managing multiple units, scheduled maintenance is a practical way to stay ahead of tenant calls and extend equipment life. |
| HVAC System Installation & ReplacementMost Popular |
| Homeowners, landlords, and property managers replacing aging or failed equipment | Load calculations determine the right equipment size for the space. Undersizing and oversizing both cause comfort and efficiency problems. |
Call us to talk through your situation and get a quote on the work your home or building needs.
(707) 892-4623