Why does my air conditioner run in the winter?

Why Does My Air Conditioner Run in the Winter?

Discovering that your air conditioner is running during the colder months can be a surprising and confusing experience. However, there are legitimate reasons for this occurrence, some of which are by design and others that might indicate a need for maintenance. Understanding why this happens can ease your concerns and help ensure that your HVAC system is functioning as efficiently as possible, even when the mercury drops.

1. Heat Pump Operation

The most common reason your air conditioner seems to be active in winter is if you have a heat pump system. Heat pumps are designed to cool your home in the summer and heat it in the winter, using the outdoor unit in both operations. In heating mode, the system reverses the flow of refrigerant, extracting heat from the outdoor air and transferring it indoors. So, if your "air conditioner" is running in the winter, it's likely that it's actually your heat pump operating in its heating mode.

2. Defrost Mode

In winter, the outdoor unit of a heat pump can accumulate frost, which reduces its efficiency in heating mode. To combat this, heat pumps are equipped with a defrost cycle. During this cycle, it may appear that your air conditioning is running since the system temporarily reverses back to cooling mode to generate warm air to melt the frost on the outdoor unit. This is a normal and necessary function of a heat pump in colder weather.

3. Thermostat Settings

Occasionally, the reason your air conditioning runs in winter could be due to incorrect thermostat settings. If your thermostat is set to "cool" instead of "heat" or "auto," your air conditioning system will activate, regardless of the outside temperature. This is a simple fix but one that can significantly affect comfort and energy bills.

4. Integrated HVAC Systems

Some modern HVAC systems integrate both air conditioning and heating into a single unit, sharing interior components like air handlers and ductwork. In these systems, even when in heating mode, parts of your air conditioning system may still operate to circulate air throughout your home. This doesn’t necessarily mean the cooling function is active, but rather that the system uses the blower to distribute warm air.

5. Malfunction or System Error

If none of the above reasons apply, your AC running in winter could suggest a malfunction. This could be due to a variety of issues like a faulty thermostat, a stuck reversing valve (in heat pumps), or incorrect wiring. In such cases, it's essential to contact an HVAC professional to diagnose and resolve the problem to prevent potential damage or inefficiency.

Understanding and Addressing the Issue

Noticing your air conditioner running in winter isn’t always cause for immediate concern. Identifying the reason is the first step towards ensuring your system's efficiency and your home's comfort. Regular maintenance and familiarizing yourself with your HVAC system can help mitigate unexpected surprises and ensure that your system serves you well, regardless of the season. If in doubt, give us a call for a little clarity and peace of mind.

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Why Too Much Humidity Is Bad for Your Home

By Loren Crabtree • July 15, 2025

When it comes to your home’s air quality, humidity plays a critical role in maintaining comfort and safety. However, while a certain level of humidity is essential, too much of it can wreak havoc on your living space—and your health. In this blog, we’ll explore why excessive moisture in the air is bad for your home and outline actionable steps to keep your indoor environment properly balanced. Why Too Much Humidity Is Bad for Your Home 1. Mold and Mildew Growth 💧 When air becomes overly humid (above 60% relative humidity), it creates a perfect environment for mold and mildew to thrive. These fungi not only cause unpleasant odors but can also lead to structural damage, discoloration, and health issues such as allergies and respiratory problems. 2. Damage to Walls, Floors, and Furniture 🛠️ Excess humidity can cause: Warping in wood floors and furniture Peeling paint and wallpaper Damage to drywall due to water absorption over time Not only is this unsightly, but expensive repairs may follow if the problem persists. 3. Dust Mites and Pests 🐜 Higher humidity often results in dust mites flourishing, which can trigger asthma and other allergies. Additionally, some pests like cockroaches and termites are attracted to moist environments. 4. Increased Energy Bills 💸 Humidity makes the air feel warmer, forcing your air conditioner to work harder to cool your home. As a result, your energy bills can skyrocket during summer months when cooling is already a priority. What Can You Do to Reduce Humidity? 1. Use a Dehumidifier 🛠️ If humidity is a persistent problem, investing in a dehumidifier can help maintain optimal levels (between 30%-50%). These devices pull excess moisture from the air and improve overall air quality. 2. Improve Ventilation 🌬️ Good airflow is crucial for managing humidity. Use kitchen and bathroom fans when cooking or showering. Open windows to let fresh air circulate during cooler parts of the day. 3. Seal Leaks 🏡 Check for leaks in your home’s foundation, roof, windows, and doors. Water intrusion from outside can contribute to excess humidity inside. Seal these areas using weather stripping or caulk. 4. Fix Plumbing Issues 🚰 Leaky faucets, pipes, or appliances can introduce more moisture into the air. Regularly inspect and repair plumbing to prevent this problem. 5. Use Air Conditioning Efficiently ❄️ Your AC not only cools your home but also removes moisture from the air. Make sure it’s operating efficiently with regular maintenance, and clean/replace filters as needed. 6. Opt for Moisture-Absorbing Products 🧴 Place moisture absorbers like silica gel, activated charcoal, or specific products designed for closets and basements in areas prone to high humidity. Long-Term Tips for Humidity Management Landscaping Matters: Ensure proper drainage around your home’s foundation to minimize water buildup. Install a Vapor Barrier: In crawl spaces or basements, this can help prevent moisture from seeping into the air. Monitor Humidity Levels: Invest in a digital hygrometer to constantly keep an eye on humidity and act when levels start to rise. The Sweet Spot: Finding Balance While too much humidity is a problem, don’t forget—too little humidity can create its own issues, such as dry skin, respiratory discomfort, and even damage to wood furniture. Strive to maintain a balanced range of 30%-50% relative humidity year-round. Final Thoughts Excess humidity isn’t just annoying; it can cause long-term damage to your home and health. The good news? With the right tools and techniques, you can keep moisture in check and ensure your home remains a comfortable and safe space. Start taking these steps today, and say goodbye to sticky air, moldy walls, and skyrocketing energy bills!

It's Getting Hot Out Here

By Loren Crabtree • June 24, 2025

It's Getting Hot Out Here: Preparing for the Sizzle with Smart Home Cooling Tips

Sometimes the cheapest option comes at the highest price

By Loren Crabtree • June 17, 2025

🌡️💨 HVAC Wisdom: Why the Cheapest Price Might Cost You 💨🌡️ When it comes to maintaining the comfort of our homes, choosing an HVAC system based solely on the lowest price can lead to discomfort and larger financial losses down the road. Here’s why spending a little more on your HVAC unit or services is often a wise investment: 1️⃣ Energy Efficiency: Cheaper HVAC units might lack the latest technology that enhances energy efficiency, leading to higher utility bills month after month. 2️⃣ Durability and Longevity: A higher initial cost might give you an HVAC that withstands wear and tear better and has a longer lifespan. Lower-priced options may require frequent repairs or sooner replacements, adding to your costs. 3️⃣ Warranty and Support: Often, more expensive HVAC systems come with more comprehensive warranties and better customer support. When issues arise, having reliable help can save enormous stress and cost. 4️⃣ Overall Performance: Cheaper models often struggle to effectively or consistently manage the climate in your home, which could compromise your comfort during peak weather times. 5️⃣ Installation Quality: The cheapest service bids for HVAC installation might not guarantee skilled workmanship, which is crucial for an HVAC’s efficiency and operational lifespan. Poor installation can lead to multiple issues, including increased energy consumption and frequent breakdowns. 6️⃣ Features and Options: Higher-priced models usually offer advanced features like better air filtration, humidity control, and quieter operation—features that enhance overall comfort and air quality in your home. 🔧 Final Thought: An HVAC system is a critical investment in your home. It's about much more than just air temperature; it's also about air quality, energy efficiency, and your family's comfort and health. Don't let initial savings trick you into spending more in the long run. 💪 Opt for value and quality—a bit more expense upfront often pays off with a system that performs better and lasts longer. Your future self will thank you! #HVACsystem #HomeComfort #EnergyEfficiency #SmartChoice #InvestInQuality #HomeMaintenance #CostSavings