You deserve the comfort of a climate-controlled home, and A+ Derr is here to ensure you get it. We handle every aspect of your indoor environment, from HVAC repairs and installations to indoor air quality services. We’re a fourth-generation company that’s brought comfort to Clarksville homes for over half a century. We offer the utmost quality, and our 100% satisfaction guarantee is our promise of quality.Experience comfort the A+ Derr way by calling our Clarksville team at (877) 914-1764 or contacting us online. 
Air Conditioning
Clarksville summers get hotter every year, so make sure your air conditioner can still cope with the next heatwave. We install some of the best air conditioning brands on the market, and our fleet understands each one intimately. We offer:
- Air conditioning repair:Â Our diagnostic knowledge allows us to get right to the core of the problem and affect a repair that truly lasts.
- Air conditioning replacement: We’ll make sure you understand your options so that you make an educated decision that fits your budget. An exceptional installation will affect you for the rest of your system’s life span, so we do the job with the utmost precision.
- Air conditioning maintenance: Our annual tune-ups will improve energy efficiency and extend your product’s life span.
- Ductless mini-split repairs, installations, and tune-ups: If your home can’t accommodate ductwork or you’re looking for more energy efficiency, a mini-split will serve you well.
Experience a cooler summer by calling A+ Derr in Clarksville at A+ Derr in Clarksville at (877) 914-1764 or contacting us online.
Heating
You’ll always enjoy a cozy winter with A+ Derr at your side. Our complete care program will keep your system at its best at every stage of its life. We work with all heating technologies, including heat pumps, boilers, and furnaces, whether you prefer geothermal, gas, or electric power. We offer:
- Heating repairs:Â When old age and lack of maintenance cause debilitating symptoms, our repair team will resolve them promptly. Call us if your system is slow to warm, blowing cool air, or emitting unusual scents or sounds.
- Heating replacement:Â If your system is racking up frequent repairs, it might be time for a replacement. We have experience with installations of all stripes, from electric furnaces to geothermal systems.
- Heating maintenance:Â Your heating system is expensive, so protect your investment with the most comprehensive service checklist in the business.
24/7 Emergency Service (833) 232-4328 Schedule Service Schedule Service
Indoor Air Quality Services in Clarksville
Your indoor environment exposes you to allergens, volatile inorganic compounds, and many other forms of pollution. Take control of your health with a holistic air quality strategy. We’ll assist with:
- Duct cleaning: Your ducts require cleaning every year. If you have allergies, it’s best to increase their regularity.
- Humidifiers:Â These systems act as moisturizing agents that can improve skin conditions and respiratory symptoms. They can even alleviate snoring.
- Dehumidifiers:Â Take control of mold and mildew during heat waves.
- Air purifiers:Â Restore your air to EPA standards with our installations and repairs.
Arrange an indoor air quality service with Clarksville’s A+ Derr branch at A+ Derr in Clarksville at (877) 914-1764.
Why Choose A+ Derr?
A + Derr is renowned for its responsive and exacting technician fleet. We excel at finding the perfect solution to your comfort problems. We go beyond cookie-cutter service by considering your unique needs and budget. That’s why our clients appreciate us as much as they do. We’re deeply involved in the Clarksville community because we truly care about you.Take your comfort to new heights by calling A+ Derr in Clarksville at (877) 914-1764 to schedule an appointment.
FAQs
How often should I get a furnace tune-up?
The average home needs a furnace tune-up once a year, but if you have an older model or experience a particularly cold winter, you should service that up to twice a year.Â
Why is my mini-split making a sputtering sound?
Most sputtering mini-splits have a clogged condensate pipe. Sputtering could also indicate a damaged sling fan. Your unit might also be placed at an uneven angle.
Recent Jobs and Reviews in Clarksville, IN
Job Locations and Reviews
Anthony L.
Completed planned HVAC maintenance tune-up on Lennox outdoor condensing unit. Performed standard preventive maintenance procedures including system inspection, temperature measurements, and operational testing to ensure proper equipment function and efficiency.
Clarksville, IN 47129
Jordyn R.
Responded to service call for inadequate cooling capacity in residential property. Upon inspection, confirmed existing HVAC system is undersized for the total square footage requiring conditioned air distribution. Evaluated air handler, ductwork configuration, and attic insulation conditions. Documented current equipment specifications and spatial limitations. Discussed system capacity requirements and replacement options with homeowner to properly address cooling deficiencies throughout the living space.
Clarksville, IN 47129
Anthony L.
Completed annual planned maintenance visit on HVAC system. Verified thermostat operation showing 73°F on Honeywell Home ProSeries digital unit. Performed electrical diagnostics using clamp meter to measure current draw on outdoor condensing unit, confirming proper amperage levels. System operating within normal parameters with 16x20x5 filters noted at 2 years service life.
Clarksville, IN 47129
Anthony L.
Completed Gold Level maintenance on 13-year-old Lennox furnace system during second visit. Performed comprehensive system inspection including temperature verification at supply register reading 72.5°F, checked gas line connections and safety shutoff valve, inspected ductwork and PVC condensate drain lines, and replaced 14x24x1 air filter. Provided smart thermostat options for future upgrade installation as requested.
Clarksville, IN 47129
Anthony L.
Completed scheduled air conditioning tune-up and preventative maintenance on residential cooling system. Performed comprehensive system inspection, verified thermostat operation and calibration, checked airflow at floor registers, and documented baseline system measurements. All components found operating within normal parameters with no immediate service needs identified.
Clarksville, IN 47129
Jordyn R.
Responded to water leak concern in attic area following rainfall. Inspected rooftop penetrations and flue pipe installations per city inspector's concerns regarding improper flue pipe. Upon examination, identified two roof penetrations with existing flashing and sealing materials. Evaluated weatherproofing integrity of pipe boots and flashing collars around both penetrations to determine source of water intrusion. Documented current condition of roofing penetrations and sealing components for assessment of necessary corrective measures to prevent further moisture infiltration and ensure safe equipment operation.
Clarksville, IN 47129
Collin D.
Completed follow-up visit to install correct light fixture above kitchen sink. Previous fixture was incompatible with the application. Successfully mounted and wired new fixture, verified proper operation, and documented installation with photos.
Clarksville, IN 47129
Collin D.
Completed electrical service upgrade including replacement of main electrical panel and utility meter. Installed new gray metal panel box in interior utility space with proper mounting and secure connections, ran necessary conduit and wiring from exterior meter location through building structure to new panel. Replaced exterior weathered meter assembly with updated equipment, ensuring proper weatherhead connections and conduit routing along brick exterior wall. Additionally replaced interior light fixture per customer request. All work completed to code with proper grounding and circuit protection, system tested and verified operational.
Clarksville, IN 47129
Jordyn R.
Completed comprehensive Platinum Level planned maintenance on single HVAC system during first-year service visit. Performed thorough inspection of outdoor condenser unit and indoor air handler components, verifying proper operation of all mechanical and electrical systems. Measured amperage draw at 496 amps using calibrated clamp meter to confirm compressor performance within manufacturer specifications. Inspected condenser fan motor operation, refrigerant line connections, and electrical disconnect box for proper function and safety compliance. Verified airflow through condenser coils and checked unit mounting stability on exterior pad. Documented equipment condition with detailed photographs showing both indoor blower assembly and outdoor condensing unit. System operating efficiently with no deficiencies noted at time of service.
Clarksville, IN 47129
Jordyn R.
Completed Platinum Level planned maintenance on a single HVAC system with one year of service. Performed comprehensive system inspection including electrical diagnostics using clamp meter, which confirmed proper amperage draw at 85.1 amps, indicating normal compressor operation. Accessed outdoor condensing unit, inspected all electrical connections, capacitor, and wiring harness for proper terminations and signs of wear. Verified condenser coil fins are clean and intact with no visible damage or deterioration. Replaced 16x20x4 air filter as part of routine maintenance protocol. All components operating within manufacturer specifications with no deficiencies noted.
Clarksville, IN 47129
Anthony L.
Completed planned maintenance on Lennox residential HVAC system including filter replacement with 20x20x4 filter. Performed electrical diagnostics using clamp meter to verify proper amperage draw and system operation. Inspected outdoor condensing unit, confirmed proper operation of compressor and condenser fan, and verified all components functioning within normal parameters.
Clarksville, IN 47129
Jordyn R.
Conducted replacement estimate for existing HVAC system with failed heat exchanger containing multiple holes rendering unit inoperable. Assessed current equipment condition, evaluated home heating and cooling requirements, and provided comprehensive replacement options featuring Carrier brand equipment per customer preference.
Clarksville, IN 47129
Anthony L.
Diagnosed and repaired no-heat condition on 3-year-old furnace by inspecting the ignition system and verifying proper flame sensing. Restored normal operation by cleaning burner assembly and checking all electrical connections, confirming proper gas valve operation with visible blue flames and normal ignition sequence.
Clarksville, IN 47129
Victor W.
Performed monthly maintenance on 20-year-old Gold Level HVAC system. Inspected gas furnace with proper flame pattern and combustion. Replaced air filter (10x30) as part of routine service. System operating efficiently; next service scheduled for 06/19/2025.
Clarksville, IN 47129
Paul G.
Responded to service call for main sewer line blockage. Located and excavated two access points in customer's yard, revealing a green cylindrical clean-out pipe. Inspection confirmed root intrusion in the main drain line. Successfully cleared the blockage using professional drain cleaning equipment, restoring proper flow to the sewer system.
Clarksville, IN 47129
Brad C.
Conducted comprehensive HVAC replacement estimate for residential property. Inspected electrical panel to evaluate system compatibility and load capacity. Examined existing air filtration system, noting significant dust accumulation and filter deterioration requiring immediate attention as part of the proposed system upgrade.
Clarksville, IN 47129
Victor W.
Conducted platinum level maintenance service on system. Performed pressure diagnostics using dual port manometer with readings of 36.6 on both ports. Replaced dirty air filter which showed significant dust accumulation in the pleated material.
Clarksville, IN 47129
Anthony L.
Responded to emergency call for carbon monoxide alarm activation in residence with 4-year-old HVAC system. Conducted comprehensive gas leak detection using UEI digital analyzer, which recorded elevated CO readings of 62 PPM. Testing at supply registers confirmed gas distribution through the duct system. Located and repaired leak source, restored system to safe operating parameters, and verified normal CO levels before completing service.
Clarksville, IN 47129
Charlie M.
Performed monthly maintenance on 4-year-old HVAC system (16"x25"x1" filter size) per Platinum Level service agreement. Conducted electrical diagnostics using DL-988 True RMS multimeter to verify proper voltage readings across components. Accessed system components using hex key tools while wearing appropriate PPE to complete the scheduled maintenance tasks.
Clarksville, IN 47129
Charlie M.
Responded to no-heat call for 10+ year old system with no airflow. Diagnostic inspection revealed severely clogged air filters (both pleated carbon filter and standard mesh filter) restricting proper airflow. Replaced filters and performed system reset, restoring normal heating operation and proper airflow through vents.
Clarksville, IN 47129
