Why Your AC Freezes Up Even When It’s Hot Outside

June 5, 2026

While it may seem illogical for ice to develop on an air conditioner in the summer, these units can actually freeze up during extreme outdoor temperatures. AC ice buildup is often a warning sign of an underlying issue with your AC unit, ranging from airflow to refrigerant and internal component malfunctions. If you’re wondering, “Why is my AC frozen?” it’s typically due to an issue that prevents your system from operating properly. Ignoring a frozen air conditioner can lead to worsening damage, major system failure, and higher energy bills. It’s best to understand the common causes of

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Restaurant HVAC Problems: Grease, Ventilation, and Makeup Air

May 20, 2026

Typical Restaurant HVAC Problems Between airborne grease, constant cooking, high heat, and strict code requirements, restaurant HVAC systems are under regular stress. Understanding some of the most common HVAC issues for restaurants can help you to take preventative action to minimize your risk of experiencing a disruptive breakdown. What Makes Restaurant HVAC Systems Different Restaurant HVAC systems are very different than residential or other commercial systems. Cooking equipment generates a high heat load that HVAC systems must compensate for. They operate continuously for long hours and are often exposed to airborne grease.

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“Aux Heat” Showing on Your Thermostat: When It’s Normal vs a Problem

May 4, 2026

What Does Aux Heat Mean on Your Thermostat If you’ve ever taken a look at your thermostat and noticed that it says aux heat or just aux, it can be a little bit confusing. Auxiliary heat is typically a part of your normal heating system’s operation. However, there are times when this can signal a problem that needs prompt attention from a professional. Understanding the differences between the two can help you have peace of mind about what steps to take next. What Does Aux Heat Actually Mean? Aux heat stands for auxiliary heating. It’s

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Thermostat Replacement: Why a New Thermostat Doesn’t Always Fix HVAC Problems

April 6, 2026

As a homeowner, you probably assume that the thermostat causes the problem when your HVAC system stops working correctly. It often becomes the first thing blamed because it controls the system and sits right in plain view. When temperatures feel off or the system does not respond, replacing the thermostat seems like the fastest solution. However, thermostat replacement does not always fix the issue. In many cases, the thermostat is not working because something else in the system has failed or stopped responding. The thermostat only sends signals, so if your HVAC is not responding to thermostat

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HVAC Short Cycling: How It Damages Your System and Spikes Your Bill

March 18, 2026

A typical HVAC cycle usually runs for 10-20 minutes, depending on the current weather conditions. Cycles that run shorter than this are problematic for numerous reasons, including potential equipment damage and worse efficiency. Short cycles can occur with both heating and cooling setups. Here is what you need to know about the risks associated with short cycling. If you suspect your system is not running properly, professional HVAC service in Greenville, WI can help diagnose the issue before it leads to larger repairs. Why Short Cycles Even Happen Short cycles occur because something is preventing your

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What to Expect When Upgrading Your Heating System

October 6, 2025

Choosing a new heating system isn’t just about selecting the most or least expensive model. There’s a huge variety of system types, sizes, and features. At Black-Haak in Greenville, WI, we guide you through the entire process. It begins with a consultation and load calculation, followed by our assistance in selecting the system with the features and efficiency you want. The detailed estimate will include the anticipated duration of the installation. Next, we schedule the swap, and then we can guide you on how to prepare to minimize disruption to your household. After the installation, we

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From Sweltering to Sweater Weather: Adjusting Your HVAC for Fall

September 1, 2025

As warm days start to turn crisp, your home’s comfort system needs to shift gears. That transition doesn’t happen on its own. It takes a little planning, a few tweaks, and some attention to the parts of your HVAC setup that often get overlooked. If you’ve been running your cooling system hard all summer, now’s the moment to give it a rest and get your home ready for what’s next. Fall doesn’t wait. It arrives quickly, and you’ll want your system ready before the first cold front rolls in. That’s why Black-Haak in Greenville, WI, recommends

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Central Air vs. Ductless Systems: Which Is Right for You?

July 7, 2025

If you’re looking to add air conditioning to your home, either a central or a ductless system can be a good choice. Ductless is obviously the best way to go if you don’t have central heating due to the cost and complexity of trying to retrofit your house with ductwork. Even if you already have central AC and you just need to replace it, there are times when a ductless mini-split system may still be the better choice. In this article, we’ll look at how central and ductless systems compare in areas like cost, efficiency and cooling effectiveness to help

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Why Regular AC Tune-Ups Save You Money in the Long Run

May 2, 2025

One mistake far too many homeowners make is neglecting their HVAC system until something suddenly goes wrong with it. Many people believe that preventative maintenance services and annual tune-ups are just a way for an HVAC company to upsell you on things or get you to pay for additional services. While this may be the case with some less reputable companies, the truth is that paying for an annual tune-up is a good investment in your HVAC system and something that’s always going to pay off. We’ll explain what’s involved with an HVAC tune-up and the different ways this service

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5 Excellent Reasons to Upgrade to a Smart Thermostat This Spring

April 1, 2025

Did you know that the U.S. Department of Energy (DOE) encourages every household to upgrade to a programmable or smart thermostat? Despite that, nearly half of all homes still use a basic thermostat to control their HVAC systems. Adoption rates continue to lag behind even conservative industry estimates for consumers. If you’re among the holdouts, here are five great reasons to replace your old thermostat this spring. 1. Rebates and Other Energy Incentives Consumer surveys suggest that concerns over price may be driving the slow adoption rates. The good news is that widespread availability has lowered

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