A home that heats and cools right is a comfortable home, and that is what Windsor HVAC Company is here to deliver. Whether you own a single-family home in Windsor, manage a rental portfolio across Sonoma County, or oversee a commercial property that needs a system running all day, we handle the full range of heating and cooling work, from a quick repair call to a complete system replacement. The rate is given on the call, before anything is scheduled, so you know what you are looking at before anyone comes out. Quick response. Careful diagnosis. Clean install.
Not every HVAC company works the same way, and the range of work matters when something goes wrong mid-season. We cover heat pumps, furnaces and mini-splits all within scope, which means one call handles whatever system is in your home or building. Whether the problem is a system blowing warm air, a unit that won't turn on, short cycling, strange noises, or rooms that never seem to reach the right temperature, we diagnose what is actually happening before we talk about parts or repairs.
Ductwork and thermostat issues get folded into the same visit when they are part of the problem. A system that runs but doesn't perform is often losing conditioned air through leaking ducts or fighting a thermostat that isn't reading the space correctly. We check both as part of a thorough diagnosis rather than treating them as separate service calls. We'll explain the diagnosis before any work is authorized.
When an air conditioner stops cooling, the cause is usually one of a short list: a refrigerant leak, a failing compressor or condenser component, a frozen evaporator coil, or an airflow restriction that has let the system overheat. If the unit is blowing warm air, leaking water near the air handler, or simply won't start, those symptoms point in specific directions. We work through the diagnosis systematically so the repair addresses the actual fault rather than the most visible one.
A furnace that blows cold air or won't start is a different problem from a heat pump that loses capacity in heating mode, and diagnosing them correctly means knowing the difference. We handle both, along with the smell of burning dust on first-season startup, ignition and heat exchanger issues, and the fall tune-up that catches small problems before they become a no-heat call in January. If you have not had the furnace serviced going into the colder months, a pre-season check is the straightforward way to avoid an emergency.
At some point a repair stops making financial sense, and a replacement is the better call. Age, repair history, and the cost of the parts needed all factor into that conversation. When a replacement is the right move, load calculations done properly on a replacement determine the correct equipment size for the space, which affects both comfort and long-term operating cost. Undersizing and oversizing both cause problems, and we size the system to the building rather than to whatever was there before. Replacement work is scheduled for homes, rental properties between tenants, and commercial spaces where downtime has a real cost.
A thermostat that is not reading the space accurately, losing its schedule, or failing to communicate with the air handler affects the whole system's performance. We install standard replacements and smart thermostats, and we confirm compatibility with heat pump and multi-stage systems before the work starts. The thermostat is confirmed as communicating before sign-off, so you are not left wondering whether the new control is actually doing its job.
Leaking ducts are one of the more common reasons a home has hot and cold spots that don't respond to thermostat adjustments. Conditioned air that escapes into an attic or crawlspace before it reaches the room is wasted capacity, and it shows up in both comfort and energy bills. We inspect ductwork as part of a broader system diagnosis and seal or repair sections that are losing air. If one room in the house never gets comfortable while the rest of the system seems to be working, the ducts are a logical place to start.
Before a small issue turns into a full breakdown, a scheduled tune-up finds it. A spring AC tune-up covers the condenser coil, refrigerant charge, electrical connections, and airflow through the system before the warm months arrive. A fall furnace tune-up covers the heat exchanger, ignition components, burner operation, and filter condition before the heating season starts. For landlords and property managers, scheduled maintenance across multiple units is a practical way to stay ahead of tenant calls and keep equipment running through its full service life.
If you've never hired an HVAC company before, a no-heat or no-cool situation is the worst time to figure out who to call. We take emergency calls every day from 7:30 AM to 10:00 PM. When the system is completely down and the house is not livable, the goal is a real diagnosis and a clear scope, not a rushed guess. One number. One call. One HVAC tech at your door.
We handle no-heat calls in winter and no-cool calls during the warm stretch that hits Sonoma County every summer. If the system has stopped entirely, is tripping the thermostat off, or is running but producing nothing, call us and we will work through what is happening. Give us a call and we'll get the comfort back.
If you're not sure your system can keep up, the answer often has more to do with what your home was built with than how old the equipment is. Windsor and the broader Sonoma County area have a mild marine climate that historically kept air conditioning adoption low, but recent heat events have changed that picture fast. Wildfire smoke season adds another layer that most standard systems were never designed to handle. And California's push toward electrification is making heat pumps the default choice for a growing number of homeowners and property managers. These three services reflect what is actually happening in this area right now.
A large share of homes in and around Windsor were built without central air conditioning. When a first-time install is on the table, the choice between central AC and a ductless mini-split system depends on whether the home has existing ductwork in good condition. A home with no duct system, or with ducts that are not worth extending, is often a better fit for a ductless mini-split, which conditions individual zones without the need for new duct runs. For homes that do have ductwork, adding a central cooling system to an existing air handler is a straightforward path. Either way, the repair or install scope is priced before the work starts, and we size the equipment to the actual load of the space.
Standard one-inch filters were designed to protect HVAC equipment from dust, not to capture the fine particulate matter that wildfire smoke carries. A MERV-13 or higher-rated filter is built to a different standard, with a denser media that catches smaller particles without the pressure drop that damages some systems. Upgrading to MERV-13 filtration involves checking that the air handler can move air through the denser media at the required flow rate. Where the existing equipment can support it, we upgrade the filter housing or media. Where it cannot, a dedicated whole-house air filtration unit installed in the duct system is the more appropriate path. We confirm air handler compatibility before recommending an approach.
California has been moving away from gas furnaces for new construction and major replacements for several years now, and heat pumps have become the standard answer for homes making that shift. A heat pump moves heat rather than generating it, which makes it efficient across the mild temperature range that covers most of Windsor's heating season. For homes with existing ductwork, a ducted heat pump replaces the furnace and AC as a single system. For homes without ducts, a mini-split heat pump handles both heating and cooling without requiring new duct runs. We install and replace heat pump systems in both configurations, and we size the equipment to the home. We'll get your home comfortable again fast.
HVAC pricing depends on what the job actually is. A diagnostic visit for an AC that won't start costs differently from a full system replacement, and a duct sealing job is scoped differently from a thermostat swap. When you call, we talk through what is happening, ask the right questions about the system and the symptoms, and give you a clear picture of what the work involves and what it is likely to cost. There are no ballpark figures that apply to every job, and the honest answer is always that the scope drives the number.
What we can tell you is how the process works. The call is answered by someone who knows the trade and can scope the job on the phone. From there, the visit is scheduled with a clear understanding of what is being looked at. Factors that affect cost include the type of system, the age and condition of the equipment, the parts required, and the scope of the installation or repair. Call for a quote and we will walk through what applies to your situation.
We serve Windsor and the communities around it throughout Sonoma County, including Healdsburg, Cloverdale, Geyserville, Santa Rosa, and Guerneville. Residential homeowners, landlords with single-family rentals, multi-unit property managers, and commercial building owners across the area all call us for the same range of heating and cooling work. If you are in the Windsor area or nearby and need HVAC service, repair, or installation, we cover it.
A heat pump that is losing heating capacity in mild weather, blowing air that is not as warm as it used to be, running constantly without reaching the set temperature, or producing ice on the outdoor unit in conditions where icing should not occur are all signs worth investigating. Refrigerant loss, a failing reversing valve, or compressor wear can each produce those symptoms, and the diagnostic works through them in order. Call us and describe what the system is doing before assuming the unit needs to be replaced.
The outdoor unit check covers refrigerant pressure, the condition of the coil and fins, the fan motor and blade, electrical connections on the equipment, and whether the unit is free of debris that could restrict airflow. On a heat pump, the reversing valve operation is also checked. What the visit covers depends on the symptom reported, but the outdoor unit is always part of a complete system diagnosis.
An air conditioner that runs without cooling is usually pointing to a refrigerant issue, a frozen evaporator coil, a failing compressor, or an airflow restriction that is preventing the system from shedding heat properly. Each of those causes produces similar symptoms but requires a different repair. We work through the diagnostic to find the actual fault rather than defaulting to the most common explanation, and we confirm the price before any repair is started.
Short cycling, where the furnace starts and shuts off before the space reaches temperature, is often caused by an overheating heat exchanger, a pressure switch fault, or a flame sensor that is not reading correctly. Cold air from a furnace that is running can point to an ignition failure, a tripped limit switch, or a gas supply issue. We check the full ignition sequence, the heat exchanger, the pressure switches, and the blower during the diagnostic rather than replacing parts based on a guess.
A system that runs longer than it used to, struggles to reach the thermostat setting on moderate weather days, produces noticeably different temperatures from room to room, or has required multiple repairs in a single season is showing signs of age or a sizing mismatch. An undersized system runs constantly because it was never large enough for the space. An aging system loses efficiency as components wear. Either situation is worth a diagnostic visit to understand what the options are.
Standard HVAC filters are designed to protect equipment from dust, not to capture the fine particulate matter that wildfire smoke carries. A MERV-13 or higher-rated filter uses a denser media that catches a substantially greater share of those particles. The installation visit checks whether the existing air handler can move air through the denser media without a pressure drop that would reduce airflow or strain the blower. Where the system can support it, we upgrade the filter housing or media. Where it cannot, a whole-house filtration unit installed in the duct system is the appropriate path.
A heat pump installation that replaces a gas furnace involves selecting a unit sized to the home's actual heating and cooling load, not just to the square footage. Load calculations account for insulation levels, window area, ceiling height, and the local climate range. For a home with existing ductwork, a ducted heat pump connects to the existing air distribution system. For a home without ducts, a mini-split heat pump handles both heating and cooling without requiring new duct runs. The scope and the price are confirmed before installation is scheduled.
A mini-split installation involves mounting the indoor air handler, running the refrigerant line set and electrical connections to the outdoor unit, and confirming the system is communicating and operating correctly before sign-off. Most single-zone installations are completed in a day. Multi-zone systems with multiple indoor units take longer depending on the number of zones and the complexity of the line set routing. We confirm the scope and the timeline on the call before scheduling.
Heat pump thermostats require compatibility with the reversing valve and auxiliary heat stages, which is different from a standard furnace thermostat. Before recommending a replacement, we confirm the new control is compatible with the system's wiring and staging configuration. The thermostat is confirmed as communicating with the system before sign-off, and we walk through the controls and scheduling features with you before the visit is closed.
Clear a path to the air handler, furnace, or indoor unit, and remove anything stored directly in front of or on top of the outdoor condenser or heat pump. If the equipment is in a closet, a utility room, or an attic, make sure the access point is unobstructed. For ductwork work, the technician may need access to registers in multiple rooms, so clearing furniture away from vents in the problem areas is helpful. Let us know on the call if there is anything unusual about access at your property.
Windsor HVAC Company handles the full range of heating and cooling work, from emergency repairs and seasonal tune-ups to first-time AC installs and full heat pump replacements. We are available every day from 7:30 AM to 10:00 PM.
Call (707) 892-4623 to get a quote and schedule service. Give us a call and we will take care of it.
From a quick repair call to a full system replacement, we cover the heating and cooling work that Windsor 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 |
|---|---|---|---|
| Ductwork Repair & Sealing |
| Homes with hot and cold spots that do not respond to thermostat adjustments | Conditioned air escaping into an attic or crawlspace shows up in both comfort and energy bills before most homeowners connect the two. |
| Ductless Mini-Split Installation |
| Homes without existing ductwork or rooms that need independent temperature control | Most single-zone installations are completed in a day. Multi-zone systems take longer depending on the number of indoor units and line set routing. |
| Heat Pump Electrification |
| Homeowners moving away from gas heat or replacing an aging furnace and AC together | A heat pump moves heat rather than generating it, which makes it efficient across the mild temperature range that covers most of Windsor's heating season. |
| 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. |
| Heat Pump Repair & Service |
| Homes with a heat pump losing capacity in heating or cooling mode | Heat pumps can appear to be working while losing significant capacity, so a performance check is worth scheduling before symptoms worsen. |
| Heating & Furnace Repair |
| Homes with a furnace blowing cold air, short-cycling, or failing to start | A pre-season check in fall is the straightforward way to avoid a no-heat call in January. |
| 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. |
| Indoor Air Quality & Air Filtration |
| Households affected by wildfire smoke, allergens, or poor indoor air during fire season | A denser filter media can restrict airflow if the air handler cannot support it. We check compatibility before recommending an approach. |
| Emergency HVAC Service |
| Any household where the system has stopped entirely and the home is not livable | We take emergency calls every day from 7:30 AM to 10:00 PM. The goal on an emergency visit is a real diagnosis and a clear scope, not a rushed guess. |
| Thermostat & Smart Controls |
| Homes with a thermostat that is losing schedules, misreading temperature, or failing to communicate with the air handler | Heat pump systems require a thermostat compatible with reversing valve and auxiliary heat staging, which we confirm before recommending a replacement. |
| AC Repair & Service |
| Homes with a system blowing warm air or failing to start | A frozen evaporator coil or refrigerant issue can look identical from the thermostat, so diagnosis comes before any parts discussion. |
How do I know whether to repair or replace my HVAC system?
The decision usually comes down to the age of the equipment, the cost of the repair needed, and how the system has been performing overall. A system that has required multiple repairs in a single season, struggles to reach the thermostat setting on moderate weather days, or is old enough that replacement parts are becoming harder to source is often a better candidate for replacement than continued repair. We work through that conversation on the diagnostic visit and give you a clear picture of what both paths cost before any decision is made.
Why is one room in my home always hotter or colder than the rest?
Uneven temperatures across rooms are usually caused by one of three things: duct leaks that are losing conditioned air before it reaches the problem room, a system that was never sized correctly for the layout of the home, or a zone control or damper issue. A thermostat that is not reading the space accurately can also produce the same symptom. We check ductwork, airflow, and thermostat communication as part of the same diagnostic rather than treating each as a separate call.
What do strange noises from my HVAC unit usually mean?
The type of noise points in a specific direction. A banging or clanking sound often indicates a loose or failing component inside the air handler or blower assembly. A high-pitched squealing usually points to a belt or motor bearing. A clicking that does not stop after startup can indicate an ignition or relay issue. Rattling at the outdoor unit is often debris or a loose panel. None of these are sounds to leave running, because a minor mechanical issue can become a more expensive one if the system keeps operating with the fault present.
Diagnosis Explained Before Any Repair
We walk through what the system is doing and what the diagnostic found before any repair is authorized. You know what the work involves and what it costs before anything starts.
How does a dirty filter or coil affect system performance?
A clogged filter restricts airflow through the system, which forces the blower to work harder and reduces the amount of conditioned air reaching the living space. Over time, restricted airflow lets the evaporator coil drop below freezing, which causes ice buildup and can stop cooling entirely. A dirty condenser coil on the outdoor unit prevents the system from shedding heat properly, which drives up operating pressure and stresses the compressor. Changing the filter on schedule and keeping the outdoor unit clear of debris are the two simplest things a homeowner can do to keep a system running as it should.
How often should I schedule a maintenance tune-up?
Once a year is the standard for most systems, but the timing matters. An AC tune-up is best scheduled in spring before the warm months arrive, so any issues are found before the system is running daily. A furnace or heat pump tune-up fits better in fall, before the heating season starts. For a heat pump that runs year-round for both heating and cooling, a twice-yearly check covers both modes. Landlords and property managers with multiple units often find it easier to schedule maintenance across all units at once rather than responding to individual tenant calls.
What are the signs of a refrigerant or airflow problem?
A refrigerant issue often shows up as an AC that runs continuously without reaching the set temperature, ice forming on the indoor coil or the line set running to the outdoor unit, or warm air coming from supply vents when the system is in cooling mode. An airflow problem produces similar symptoms but usually comes with reduced airflow at the registers, a system that short-cycles, or a frozen coil caused by restricted air movement rather than low refrigerant. Both require a diagnostic visit to separate correctly, because the repair path is different for each.
Older Systems and New Installs Both Covered
Whether the equipment is decades old and showing its age or a first-time install in a home that never had cooling, we handle the full range of heating and cooling work.
Do I need to be home for the HVAC work?
For most visits, yes. The technician needs access to the equipment, which is typically inside the home, in a utility closet, attic, or crawlspace. For outdoor-only work, such as a condenser coil cleaning or an outdoor unit inspection, access to the interior may not be required. We confirm what access is needed when the visit is scheduled.
What does a system replacement actually involve, from start to finish?
A replacement starts with a load calculation to determine the correct equipment size for the space. Sizing to the old unit is not the right approach, because the previous equipment may have been incorrectly sized to begin with. Once the equipment is selected and the scope is confirmed, the existing system is removed and the new equipment is installed, connected, and commissioned. The thermostat is confirmed as communicating with the new system before the visit is closed. Most single-system residential replacements are completed in one day, though the timeline depends on the complexity of the installation.
Emergency No-Heat and No-Cool Calls Handled
We take emergency calls every day from 7:30 AM to 10:00 PM. When the system is down and the home is not livable, the goal is a real diagnosis and a clear scope on the same visit.
Is older equipment worth repairing, or should I plan for replacement?
Age alone is not the deciding factor, but it is part of the picture. A system in its second decade that needs a compressor or heat exchanger replacement is often closer to the end of its useful life than the cost of that single repair suggests. A younger system with a straightforward fault, such as a failed capacitor or a bad contactor, is generally worth repairing. We give you the honest breakdown of what the repair costs versus what a replacement would involve so you can make an informed call rather than guessing.
How does a smart thermostat upgrade affect system performance?
A smart thermostat can improve comfort and reduce energy use by learning occupancy patterns and adjusting the schedule automatically. The practical benefit depends on how well the thermostat communicates with the system. A heat pump, for example, requires a thermostat that is compatible with the reversing valve and any auxiliary heat stages, which is not true of every smart thermostat on the market. We confirm compatibility before recommending a specific control, and we confirm the system is communicating correctly before the visit is closed.
What causes a system to short-cycle, and is it a serious problem?
Short-cycling, where the system starts and shuts off before the space reaches the set temperature, is a sign that something is interrupting the normal run cycle. On a furnace, the most common causes are an overheating heat exchanger, a pressure switch fault, or a flame sensor that is not reading correctly. On an AC or heat pump, short-cycling often points to a refrigerant charge issue or an oversized system that satisfies the thermostat too quickly. Left unaddressed, short-cycling puts extra wear on the compressor and other components because the startup cycle is the hardest part of the operating sequence.
Call us to talk through your situation and get a quote on the work your home or building needs.
(707) 892-4623