Devco Heating and Air Conditioning has been serving Windsor and the surrounding Sonoma County area since 2004. Whether you are a homeowner dealing with a broken AC, a landlord trying to keep a rental comfortable, a property manager juggling multiple units, or a small business that needs reliable climate control, we handle the full range of HVAC work: repair, installation, replacement, maintenance, and emergency service. No pressure and no gimmicks, just reliable comfort. Family-owned. Locally rooted. Comfort is our business.
No matter what's going wrong with your heating or cooling, we can diagnose it and get it fixed. When a technician arrives, they check the system from the outside in: refrigerant levels, airflow, electrical connections at the unit, thermostat calibration, and component condition. Whether your AC stopped working overnight, your furnace is blowing cold air, or your heat pump is running but not doing much, we track down the problem fast.
Work is performed by qualified HVAC technicians who know these systems well and explain what they find before any repair begins.
A system that is not cooling, blowing warm air, or cycling on and off without bringing the temperature down usually points to a refrigerant leak, a failing compressor, a dirty evaporator coil, or a condenser issue. Windsor's climate has historically been mild, but summer heat events are becoming more frequent and more intense. When the temperature climbs and your AC quits, getting it back online fast matters.
Sonoma County winters are mild compared to much of the country, but they are damp and can turn cold quickly. A furnace that is not igniting, blowing cold air, short-cycling, or simply not keeping up with demand needs attention before the next cold stretch arrives. We diagnose ignition problems, heat exchanger issues, blower faults, and control board failures on gas furnaces throughout the area.
Heat pumps are growing in popularity across Sonoma County, partly because they handle both heating and cooling in a single system and partly because California's electrification goals make them an attractive long-term choice. When a heat pump stops heating or cooling, the cause is often a refrigerant charge issue, a reversing valve problem, or a sensor fault. We diagnose and repair all of it.
From aging systems to brand-new installs, we help you choose the right equipment and get it installed correctly. At some point, repairing an old system stops making financial sense. If your unit is more than 15 years old, breaking down repeatedly, or struggling to hold temperature, replacement is usually the smarter path.
We handle full system replacements as well as targeted equipment swaps: a new air conditioner paired with an existing air handler, a heat pump replacing a gas furnace, or a ductless mini-split added to a room or addition that lacks ductwork. Mini-splits are a practical fit for many Windsor homes, especially older properties that were never built with a central duct system.
We protect your floors and finishes while we work, and we leave the job site clean when we are done. Call today and we'll set up your appointment. Simple booking. Clear pricing. Reliable, lasting comfort.
Windsor sits in inland Sonoma County, sheltered from the coast but exposed to summer heat spikes, seasonal wildfire smoke, and a policy environment that strongly favors moving away from gas. These three services come up constantly in this area, and we are set up to handle all of them.
Many Windsor homes were built before central air conditioning was common in Northern California. Historically, the mild coastal climate meant AC was considered optional, but that calculus has shifted. Record heat events in recent summers have pushed a lot of homeowners to add cooling for the first time.
For homes without existing ductwork, a ductless mini-split is usually the cleanest solution. We assess the home, calculate the cooling load, select the right equipment, and handle placement and installation. The result is efficient, zoned cooling without tearing into walls to run ducts. We'll get your home comfortable again fast.
Wildfire smoke is a recurring seasonal reality in Sonoma County. When smoke settles in, outdoor air quality drops fast, and standard HVAC filters do not do much to protect the air inside. MERV-13 and higher-rated filters capture fine particulates, including the small particles that carry the most health risk during smoke events.
We upgrade existing HVAC systems to handle MERV-13-capable filtration, and we install whole-home air filtration systems that work through your central equipment. That covers every room the system reaches, which is a meaningful advantage over portable units that only treat one space at a time. Prompt response, even for last-minute comfort calls, means we can get you set up before the next smoke event arrives.
California is pushing hard toward all-electric heating, and Windsor homeowners are responding. Replacing a gas furnace with a heat pump gives you a year-round system: it heats in winter and cools in summer using the same equipment and refrigerant lines. From the HVAC side, the work involves selecting and sizing the right heat pump, running refrigerant lines, connecting the air handler, and setting up the thermostat. The panel and circuit work is handled by an electrician separately. The result is a system that runs efficiently, reduces fossil fuel use, and keeps the home comfortable in both seasons.
Whether it's a one-time repair or a full system replacement, regular maintenance is what keeps HVAC equipment running reliably between those calls. A tune-up visit covers filter condition, coil cleaning, refrigerant charge check, thermostat calibration, airflow testing, and a safety inspection of the key components.
Getting the AC serviced before summer heat spikes and the heating system checked before the damp winter months sets in is the most straightforward way to avoid emergency calls. A maintenance visit is also a good time to inspect ductwork for leaks and to upgrade to a smart thermostat if you have not already. A programmable or smart control can make a noticeable difference in both comfort and energy use. We'll get your home comfortable again fast.
Doing HVAC work right matters, and we'll help you get it right, starting with the parts of the system that often get overlooked. Leaky ductwork is one of the most common causes of uneven temperatures, high energy bills, and comfort complaints. When conditioned air escapes before it reaches the rooms it is supposed to serve, the system works harder and delivers less. We locate leaks, seal them, and repair damaged sections so the duct system supports the equipment rather than working against it.
A thermostat upgrade is one of the simplest ways to improve how a system performs. Modern smart controls offer scheduling, zoning compatibility, and remote access. Sonoma County's variable climate, with cool mornings, warm afternoons, and occasional smoke events, makes precise control genuinely useful. On the air quality side, we can assess humidity balance and recommend filtration upgrades that go beyond a standard filter. We track down the problem fast.
Scheduling an HVAC tech shouldn't be complicated, especially when the system is down and the house is either too hot or too cold to be comfortable. No heat in winter and no cooling during a summer heat event are real problems that need fast attention.
We offer same-day and after-hours service for situations that cannot wait. When you call, you reach someone who can help, get a technician dispatched, and get a diagnosis underway quickly. The goal is a repair on the first visit, or at minimum a clear picture of what is needed and a plan to get it done. Local crew. Real technician on the phone. Quick to respond.
We work with single-family homeowners, landlords managing rental properties, property managers overseeing multiple units, and small commercial clients including offices, retail spaces, and restaurants in Windsor and the surrounding Sonoma County towns. Each customer type has different needs, and we adjust accordingly.
Homeowners want the problem solved and the house comfortable. Landlords and property managers need reliable scheduling, clear communication, and work done right the first time so tenants are not calling back. Commercial clients need equipment that keeps a space functional and employees or customers comfortable. We live and work in this community, and our work shows it.
Windsor is our home base, and we serve the broader Sonoma County area regularly. If you are nearby, we can get to you.
Communities we serve include:
Call for a quote and we will confirm service to your area.
Common warning signs include the system blowing cold or lukewarm air, short-cycling on and off without reaching the set temperature, unusual noises like banging or rattling at startup, and a noticeable increase in your heating bills without a change in usage. If the system is not responding to the thermostat or is shutting off unexpectedly, those are also signals that something needs attention. Call us and we will diagnose it.
A burning smell at the start of heating season is often dust burning off the heat exchanger and may clear on its own after a few minutes. A persistent burning smell, a smell like melting plastic, or a musty odor that lingers can indicate a more serious problem such as an overheating motor, a failing component, or mold growth in the ductwork. Shut the system off and call us so we can inspect it safely.
Uneven temperatures usually point to one of a few causes: leaky or undersized ductwork, a damper that is not functioning correctly, an HVAC system that was not sized properly for the home's layout, or a room that lacks adequate supply or return airflow. We inspect the system and the duct distribution to find out what is actually causing the imbalance, rather than guessing.
If the system is more than 15 years old, has needed repeated repairs, or is struggling to hold temperature, replacement is often the smarter investment. A heat pump is worth serious consideration in Windsor's climate because it handles both heating and cooling in a single system and runs efficiently through the mild winters and warm summers this area sees. We assess your current equipment and give you an honest comparison of the costs and benefits before you decide.
From the HVAC side, the work involves selecting and sizing the right heat pump for your home, removing the old equipment, running refrigerant lines, connecting the air handler, and commissioning the new system. The electrical circuit and disconnect are handled separately by an electrician. We coordinate so the HVAC side is ready when the electrical work is complete, and we confirm everything runs correctly before we leave.
We assess your current system to determine whether it can support a MERV-13 or higher-rated filter without restricting airflow to the point that it strains the equipment. If the system can handle the upgrade, we make the switch and explain what to expect during smoke events. For homes where the existing equipment is not compatible, we can install a whole-home air filtration system that works alongside your central HVAC to clean the air throughout the house.
For homes without existing ductwork, a ductless mini-split system is usually the fastest and least invasive path to whole-home or room-specific cooling. If the home already has ducts in good condition, central AC is a strong option. We assess your home's layout, calculate the cooling load, and walk you through which approach makes more sense for your specific situation before any equipment is selected.
The technician starts with a systematic inspection: checking refrigerant levels, airflow, thermostat calibration, electrical connections at the unit, and the condition of key components like the capacitor, contactor, heat exchanger, and blower motor. The goal is to find the root cause rather than replace parts until something works. We explain what we find before any repair begins.
Components wear over time, coils accumulate buildup that reduces heat transfer, refrigerant charge drifts, and ductwork develops leaks that let conditioned air escape before it reaches the rooms it is supposed to serve. An aging system has to run longer cycles to hit the same temperature, which pushes energy bills up. A tune-up can recover some efficiency, but at a certain point replacement delivers better long-term economics.
We recommend having someone present so the technician can walk you through what was found and confirm you are satisfied with the work before leaving. For straightforward maintenance visits on accessible equipment, other arrangements may be possible. Discuss your situation when you call to schedule and we will work out the right approach.
When you are ready to schedule service or get a quote on a new system, Devco Heating and Air Conditioning is the team to call. We make the process straightforward: describe what is going on, we will ask a few questions, and we will give you honest pricing before any work begins. No pressure and no gimmicks, just reliable comfort.
Call us at (707) 892-4623 to schedule a service call or request a quote on installation or replacement. Simple booking. Clear pricing. Reliable, lasting comfort.
We handle the full range of heating and cooling work for Windsor homes, rental properties, and commercial spaces throughout Sonoma County. From a quick AC repair to a full heat pump electrification project, every job gets the same careful attention from start to finish. The table below lays out what each service covers, who it fits best, and a practical note to help you figure out where to start. Call us when you are ready and we will get you scheduled.
| Service Type | What's Included | Best Suited For | Helpful Details |
|---|---|---|---|
| Seasonal Maintenance & Tune-Ups |
| Homeowners and property managers who want to stay ahead of breakdowns | Regular maintenance extends equipment life and catches small problems before they become expensive ones |
| Ductwork Repair & Sealing |
| Homes with uneven temperatures, high energy bills, or weak airflow in certain rooms | Leaky ducts are one of the most common hidden reasons a system works harder than it should |
| First-Time AC & Ductless Cooling Installation |
| Windsor homes built without central air that are adding cooling for the first time | Ductless mini-splits are often the faster, less invasive path for homes without existing ductwork |
| Heat Pump Electrification |
| Homeowners ready to replace separate heating and cooling systems with a single electric heat pump | Modern heat pumps handle Windsor's temperature range well and are more efficient than older split systems in many cases |
| Indoor Air Quality & Air Filtration |
| Households concerned about allergens, dust, or smoke particles in the air they breathe | Especially relevant in Sonoma County during wildfire season when outdoor air quality drops quickly |
| Wildfire-Smoke Air Filtration (MERV-13+) |
| Sonoma County households that want cleaner indoor air during fire season | Standard residential filters do not capture fine smoke particles; we assess your system before recommending an upgrade |
| Ductless Mini-Split Installation |
| Room additions, converted garages, or any space where running ducts is not practical | Mini-splits condition individual zones independently, which can reduce energy use in spaces that are not always occupied |
| Heat Pump Repair & Installation |
| Homeowners with an all-in-one heating and cooling system that has stopped working correctly | Windsor's mild winters are well-suited to heat pump performance year-round |
| Full System Installation & ReplacementMost Popular |
| Homes or commercial spaces with aging, frequently failing, or undersized HVAC equipment | Correct sizing from the start prevents short-cycling and uneven comfort; we handle residential and commercial jobs |
| Heating & Furnace Repair |
| Homes or light-commercial spaces that have lost heat or are blowing cold air | We give you an honest repair-versus-replace assessment before any work begins |
| AC Repair & Service |
| Homeowners whose AC has stopped cooling or is short-cycling | Same-day availability for urgent no-cool situations; we carry common parts to finish most repairs in one visit |
| Emergency HVAC Service |
| Any situation where the system has gone down and waiting is not an option | Call us and we will give you an honest answer about how soon we can get someone to you |
| Thermostat & Smart-Control Installation |
| Homeowners who want better control over comfort and energy use | A smart thermostat like Nest or Ecobee can improve how your system responds without replacing the equipment |
How do I know whether my system needs a repair or a full replacement?
Age and repair history are the two biggest factors. If your system is under 12 to 15 years old and has not needed frequent repairs, a targeted fix usually makes sense. If it is older, has broken down more than once in recent seasons, or is struggling to hold temperature even when it is running, replacement is often the smarter investment. We walk you through both options and give you our honest read before any work begins.
What are common signs that my AC or furnace is starting to fail?
For an air conditioner, watch for warm air from the vents, short cycling on and off, unusually high energy bills, ice forming on the unit, or strange noises during operation. For a furnace, signs include cold air blowing from the vents, the system failing to ignite, uneven heat across rooms, or a burner that keeps shutting off. Any of these is worth a call so we can take a look before a small problem becomes a larger one.
Why is one room in my home hotter or colder than the rest?
Uneven temperatures usually point to one of a few causes: leaky or undersized ductwork, a blocked or closed vent, a system that is not sized correctly for the home, or a zone control issue. We inspect the system and the ductwork to find out what is actually happening rather than guessing. In some cases, a ductless mini-split added to the problem room is the most practical fix.
Same-Day and Emergency Availability
When your heating or cooling system goes down, we make it a priority to get someone out to you quickly. Same-day service is often available, and we respond to emergency no-heat and no-cool calls because comfort problems do not follow a convenient schedule.
What does a seasonal tune-up actually include?
A tune-up is a thorough inspection and service visit, not just a filter swap. For a cooling tune-up, we check refrigerant levels, inspect the coil and condenser, test electrical components, verify airflow, and confirm the thermostat is communicating correctly. For a heating tune-up, we inspect the heat exchanger, test ignition and burner operation, check the flue, and look at the blower and controls. The goal is to catch anything that could cause a breakdown before it does.
How often should I schedule HVAC maintenance?
Once a year at minimum, and twice a year if you are running both heating and cooling equipment through the seasons. A spring visit before cooling season and a fall visit before heating season is the standard we recommend. Regular maintenance keeps the system running efficiently, extends its useful life, and gives us a chance to catch small issues before they turn into emergency calls.
What can strange noises from my HVAC unit mean?
Different noises point to different problems. A banging or clanking sound often means a loose or broken component inside the unit. A high-pitched squealing can indicate a worn blower belt or a bearing that is starting to fail. Clicking at startup or shutdown is usually normal, but clicking that continues during operation can signal a relay or control problem. Grinding noises are worth taking seriously right away. If something sounds wrong, call us so we can diagnose it before it causes further damage.
Transparent Upfront Pricing
We gather the details about your system and your situation before quoting, and we give you a real number for your specific job before any work begins. If something unexpected comes up once we are into the job, we tell you before we continue.
How do ductwork leaks affect my energy bills and comfort?
When conditioned air escapes through gaps in your ductwork before it reaches the rooms you are trying to heat or cool, your system has to run longer to compensate. That means higher energy bills and uneven comfort throughout the home. In some cases, duct leakage is significant enough that sealing the ducts delivers a noticeable improvement in both comfort and efficiency without replacing any equipment.
Is same-day or emergency service available for no-heat or no-cool situations?
Yes. We offer same-day service for urgent heating and cooling situations, and emergency response when the system has gone down and waiting is not an option. When you call, we will ask a few questions to understand what is happening and give you an honest estimate of how quickly we can get someone to you.
Clean and Respectful Workmanship
We protect your floors and finishes while we work, and we leave the space clean when we are done. Work performed by qualified HVAC technicians is our standard on every job, whether it is a quick repair or a full system replacement.
Do I need to be home when the technician comes out?
For most service calls and installations, yes, someone should be home to provide access to the equipment and to hear the technician's findings and recommendations. If you manage a rental property and need to coordinate access differently, let us know when you call and we will work out a practical arrangement.
What does upgrading to a smart thermostat actually involve?
We assess whether your existing HVAC system is compatible with the smart thermostat you are considering, handle the low-voltage control wiring on the equipment side, and configure the new thermostat so it communicates correctly with your system. Most installations are straightforward and completed in a single visit. A smart thermostat gives you better scheduling control and can help the system respond more efficiently to how you actually use your home.
Why is wildfire-smoke air filtration worth thinking about in Windsor?
During fire season, fine smoke particles can move through a standard residential filter and circulate through your home. MERV-13 and higher-rated filters are designed to capture those smaller particles, but not every HVAC system can handle the added resistance without losing airflow. We assess your equipment first, then recommend the right combination of upgraded filtration, whole-home air purifiers, or air scrubbers based on what your system can support and what your household needs.
Call us at (707) 892-4623 and we will help you figure out exactly what your system needs and get you scheduled.
(707) 892-4623