When something goes wrong at home—a leaking pipe, a faulty light switch, or an air conditioner that just can’t keep up, it can throw your whole day off. At A+ Derr Heating, Cooling, Plumbing, & Electrical, we’re more than just service pros, we’re neighbors who understand what it means to keep your home running. Our team provides dependable heating, cooling, plumbing, and electrical services in Mount Vernon backed by real experience, licensed professionals, and a commitment to treating you right, from the first call to the final cleanup. Call our team today at 833-232-4328 or connect with us online for more information.Â
Mount Vernon Plumbing Services for Better Functionality
It might start with a slow drip under the sink or a little water pooling where it shouldn’t—but before you know it, you’re dealing with water damage and rising stress. That’s why our local Mount Vernon plumbers respond quickly, work efficiently, and always treat your home with care. We’re here to fix the problem and make things right—without the mess or the worry.
- Drain Cleaning & Sewer Services: When your sinks or tubs stop draining like they should, we’re there with fast solutions. Our team clears out stubborn clogs and inspects your sewer lines to make sure everything flows the way it should.
- Sump Pump Services: A flooded basement can be a homeowner’s nightmare. We install and maintain reliable sump pumps that keep your lower level dry and protected.
- Water Heater Installation & Repair: Nobody wants to start their morning with an ice-cold shower. Whether it’s a traditional tank or a tankless system, we’ll get your hot water flowing again—fast.
- Garbage Disposal Repair & Replacement: A jammed or broken disposal can bring your kitchen to a halt. We repair or replace units with minimal disruption, so you can get back to your routine.
- Pipe Leak Detection: Not all plumbing problems are visible. We use smart technology to track down leaks inside walls and under floors before they become costly repairs.
- Fixture Installation: Upgrading your bathroom or kitchen? We install faucets, toilets, and other fixtures with care, precision, and an eye for clean design.
- General Plumbing Repairs: Whether it’s a mystery drip, a running toilet, or something bigger, our team handles plumbing issues of every kind—quickly, cleanly, and with no guesswork.
24/7 Emergency Service
(833) 232-4328Â
Complete Air Conditioning Services in Mount Vernon, IN
If you’ve spent a summer in Mount Vernon, you know the heat and humidity aren’t just uncomfortable—they’re relentless. A working air conditioner isn’t a luxury here—it’s survival. That’s why our Mount Vernon cooling services are built for real-world Indiana weather, keeping your home cool, your energy bills low, and your peace of mind intact.
- AC Repair Services: Warm air? Weak airflow? Loud noises? Our repair techs find and fix the problem fast.
- New AC Installation: Whether it’s a replacement or a new build, we install energy-efficient air conditioners that meet your needs and your budget.
- Mini-Split System Installation: No ducts? No problem. These compact units offer zoned comfort with powerful efficiency.
- Seasonal AC Maintenance: Prevent breakdowns, lower your bills, and extend the life of your system with a quick annual tune-up.
Reliable Heating Services for Mount Vernon Homes
Winter in Mount Vernon has a way of creeping in fast—and when it does, there’s no comfort like a warm, cozy home. If your heating system is struggling to keep up or suddenly goes out, we’re the team you can count on. From quick fixes to total system upgrades, our heating services are built to handle Indiana’s toughest cold snaps with comfort and confidence.
- Furnace Installation & Maintenance: When your old furnace is costing you comfort and cash, it’s time for a smart upgrade. We install and maintain systems designed to keep up with unpredictable Indiana winters.
- Boiler Repair & Replacement: Radiator heat has its perks—until your boiler acts up. We repair and install boiler systems in Mount Vernon to ensure even, efficient heating throughout your home.
- Heat Pump Services: Want one system that can do it all? Our heat pumps offer reliable heating in the winter and energy-saving cooling in the summer.
- Geothermal Heating Systems: Tap into stable underground temperatures with geothermal systems that reduce your carbon footprint and your utility bills.
- Emergency Heating Repairs in Mount Vernon: Heating problems don’t follow a schedule. That’s why our team is ready 24/7 to get the heat back on—fast and fuss-free.
Safe Electrical Services in Mount Vernon
From simple switch swaps to full rewires, our licensed electricians are here to make your home safer, smarter, and better powered for everyday life. Whether you’re upgrading for convenience or fixing a frustrating issue, we handle it with expert precision and a neighborly touch.
- Electrical Panel Upgrades: Still relying on an outdated breaker box? We install modern panels that power today’s tech-savvy homes safely and reliably.
- Outlet & Switch Installations: From USB charging ports to sleek smart dimmers, we upgrade your switches and outlets to match how you live today.
- Service Upgrades: Whether you’re adding new appliances or simply need more reliable power, our service upgrades ensure your home’s electrical system can keep up with modern life.
- Equipment Repair: From faulty outlets to flickering lights and worn-out switches, we diagnose and repair aging or damaged electrical components to keep your home safe and running smoothly.
- Light Commercial Services: Have a small business in Mount Vernon? We offer light commercial electrical work—from lighting and outlets to panel upgrades—to help keep your operation efficient, functional, and compliant.
- Whole-Home Surge Protection: One lightning strike or power spike can fry your electronics. Our surge systems shield your entire home from unexpected voltage surges.
- Interior & Exterior Lighting: Brighten your kitchen, highlight your landscaping, or increase nighttime safety with professionally installed lighting that looks as good as it works.
- Backup Generators: When the grid goes down, stay up and running. We install standby generators that kick in automatically and power your essentials.
- EV Charger Installation: Tired of slow charging from a basic outlet? We install fast, reliable EV chargers so you can power up your vehicle right from your driveway.
24/7 Emergency Service
(833) 232-4328Â
Clean Indoor Air Quality Services in Mount Vernon
Temperature is only half the story when it comes to comfort at home. If the air you’re breathing is stale, dusty, or too dry, it can take a toll on your health and energy. That’s why we offer indoor air quality solutions that go beyond basic HVAC—making your home feel fresher, healthier, and easier to live in every day.
- Whole-Home Air Purifiers: Tired of breathing in dust, pollen, and who-knows-what else? Our air purifiers tackle airborne irritants and help you breathe easier in every room.
- Humidity Control Solutions: Whether your home feels dry enough to shock you or muggy enough to match the outdoors, we install humidifiers and dehumidifiers that bring your indoor climate back to balance.
- Duct Cleaning & Sealing: Over time, air ducts can turn into dust highways. We clean them out and seal leaks to boost efficiency, improve air quality, and help your system work smarter—not harder.
- Filter Replacements & Upgrades: Not all air filters are created equal. We help you find the best fit for your system and swap them out to keep air flowing clean and free of allergens.
Book Your HVAC, Plumbing, or Electrical Service in Mount Vernon, IN
Need fast, reliable service for your home systems? A+ Derr Heating, Cooling, Plumbing, & Electrical proudly serves Mount Vernon, IN with high-quality heating, cooling, plumbing, and electrical solutions. Call 833-232-4328 today to schedule your service and experience why local homeowners trust us for peace of mind year-round.
Recent Jobs and Reviews in Mount Vernon, IN
Job Locations and Reviews
James W.
Completed HVAC estimate for new system installation in detached garage pole barn structure with no existing equipment. Assessed metal building with exposed wooden framing, cement board walls, and concrete slab flooring currently under construction. Evaluated space requirements, load calculations, and equipment placement options for climate control system to serve the workshop area.
Mount Vernon, IN 47620
Luke O.
Completed planned monthly maintenance visit for single-system HVAC unit. Replaced failed condensate pump on indoor air handler unit located in utility closet. Installed new condensate pump to restore proper drainage function and prevent water damage. Performed standard Gold Level maintenance protocol including filter replacement with 16x20x5 media filter. Inspected outdoor condensing unit positioned on gravel pad against exterior wall, verified proper operation of all components. System tested and confirmed operating within normal parameters upon completion.
Mount Vernon, IN 47620
Brent D.
Completed annual Platinum Level maintenance on single HVAC system with recently installed equipment. Performed comprehensive inspection of ductwork and system components, verified proper airflow through supply registers measuring 246°F at discharge, and documented equipment identification for service records. Installed new 16x20x3 Honeywell TOPHAT filter and confirmed all mechanical and electrical components operating within manufacturer specifications.
Mount Vernon, IN 47620
Jeff J.
Completed Platinum Level monthly maintenance on a 7-year-old HVAC system, including installation of 16x25x5 filter. Inspected electrical panel and wiring connections, confirmed all wire nuts and conduit fittings were secure, and verified proper electrical connections throughout the outdoor unit's junction box. All components found operating within normal parameters with routine outdoor debris accumulation noted and system confirmed in good working condition.
Mount Vernon, IN 47620
Brent D.
Completed Platinum Level maintenance on single-system residential HVAC unit, including inspection of control board components and DIP switch settings, verification of system levelness, and replacement of 16x25x5 air filter. Noted exhaust pipe cover requirement for follow-up and documented system condition through photographic records of circuit board and installation alignment.
Mount Vernon, IN 47620
Luke O.
Responded to no cooling complaint on five-year-old residential air conditioning system. Upon arrival, performed comprehensive diagnostic evaluation of both outdoor condensing unit and indoor air handler. Inspected refrigerant lines, electrical connections, and verified no ice formation on evaporator coil. Documented equipment condition with photos showing outdoor condenser unit properly positioned on pad with adequate clearance, and indoor air handler installation in utility area with associated ductwork and drainage systems intact. System components appeared to be in good physical condition with normal wear patterns for age. Completed diagnostic assessment and provided findings to customer regarding cooling issue resolution.
Mount Vernon, IN 47620
Luke O.
Completed comprehensive Platinum Level annual maintenance on single HVAC system during first-year service visit. Performed full inspection and maintenance procedures on basement-installed furnace unit and outdoor Lennox condenser, including filter replacement with 16x25x1 filter, system performance verification, and standard preventive maintenance protocols on both indoor and outdoor components to ensure optimal operation for the upcoming season.
Mount Vernon, IN 47620
Luke O.
Completed platinum level planned maintenance service on single HVAC system. Performed comprehensive system inspection of outdoor condensing unit and indoor air handler. Replaced 20x20x2 polarized filter as part of monthly recurring maintenance agreement. Verified proper operation of all system components, checked refrigerant lines, and confirmed condensate drain functionality. System operating within normal parameters.
Mount Vernon, IN 47620
Luke O.
Completed annual planned maintenance on two ductless mini-split systems as part of Gold Level service agreement. Both 3-year-old units were inspected, tested for proper operation, and washable filters were cleaned and reinstalled. All components found to be functioning within normal parameters with no issues identified during this first visit of the annual maintenance cycle.
Mount Vernon, IN 47620
Kyle D.
Responded to service call for continuously running toilet and slow-draining shower and sink. Upon arrival, inspected toilet tank components and identified faulty fill valve causing constant water flow. Assessed bathtub drain assembly and confirmed partial blockage consistent with hair accumulation affecting both shower and sink drainage due to shared plumbing line. Removed tub spout access cover to evaluate drain system and prepared recommendations for drain cleaning service to restore proper water flow throughout bathroom fixtures.
Mount Vernon, IN 47620
Ian H.
# HVAC Install - Complete System Successfully completed installation of a complete 3-ton HVAC system with 18 SEER rating and 99% AFUE gas furnace. Installed Lennox outdoor condensing unit on concrete pad against exterior brick wall with proper clearances and secure mounting. Unit model SLFP99DF070XV36BK-01 installed indoors with all manufacturer labeling and safety notices properly affixed. Connected electrical service with external disconnect box mounted to building exterior. Verified proper refrigerant charge, tested all electrical connections, and confirmed system operation at design specifications. All equipment installed per manufacturer guidelines and local building codes.
Mount Vernon, IN 47620
Brent D.
Completed Platinum Level planned maintenance on single HVAC system. Performed comprehensive system inspection including temperature differential measurements at supply and return vents, recording 67.5°F at the indoor coil and 58.3°F at the supply register. Checked all mechanical and electrical components, verified proper airflow, and confirmed system operation within manufacturer specifications.
Mount Vernon, IN 47620
Isaac G.
Completed plumbing estimate for installation of gas line to supply furnace in attic space. Assessed existing HVAC infrastructure, ductwork, and insulation to determine optimal routing for new gas supply line. Documented current conditions including corroded metal components and insulation placement to plan safe gas line installation pathway that complies with code requirements.
Mount Vernon, IN 47620
Nick B.
Conducted on-site assessment of 16-year-old residential air conditioning system to provide replacement estimate. Inspected existing outdoor condensing unit positioned on concrete pad adjacent to building exterior, noting current refrigerant line configuration, electrical disconnect placement, and PVC condensate drainage routing. Evaluated indoor HVAC system layout using downflow configuration diagram to determine proper sizing and clearance requirements for new equipment installation, including furnace, evaporator coil, and base specifications. Documented existing installation conditions through photographic records for accurate equipment selection and proposal preparation.
Mount Vernon, IN 47620
Tyler C.
Performed follow-up service call to address continuous fan operation issue on outdoor HVAC condensing unit. Conducted system inspection and documented equipment condition with site photographs showing unit positioned on concrete pad against exterior wall with electrical conduit and refrigerant line connections visible. Addressed outstanding work items from previous installation to resolve fan control malfunction.
Mount Vernon, IN 47620
Brock B.
Completed annual second visit platinum level maintenance on 6-year-old residential HVAC system with Aspen R-410A evaporator coil and furnace assembly. Performed comprehensive inspection of all system components, verified proper operation of TXV-equipped evaporator unit, and documented equipment condition with photographic records. Replaced 20x20x5 air filter and confirmed all safety labels and manufacturer specifications remain legible and intact for future service reference.
Mount Vernon, IN 47620
Ian H.
Installed a 50-gallon tall electric water heater in utility closet with complete copper piping configuration, including blue expansion tank mounted above unit with proper connections and red-handled isolation valve. All components professionally installed and tested to manufacturer specifications with clean workmanship throughout the confined space installation.
Mount Vernon, IN 47620
Ian H.
Completed full HVAC system installation including a 4-ton, 18 SEER air conditioning unit paired with a 97% efficiency furnace. The installation included subfloor plenum configuration with proper ductwork integration. The outdoor condenser unit was positioned on a composite equipment pad with adequate clearance from the structure, electrical disconnect installed on exterior wall with appropriate conduit routing, and all refrigerant lines properly insulated and secured.
Mount Vernon, IN 47620
Collin D.
Completed electrical installation and commissioning of Generac automatic transfer switch for standby generator system. Verified proper electrical connections between utility service, transfer switch, and generator unit, ensured all conduit runs and wiring meet code requirements, and documented final installation with photographs for service records.
Mount Vernon, IN 47620
Craig U.
Completed Platinum Level maintenance on single HVAC system during first scheduled visit of the service year. Inspected and serviced mechanical equipment including red-mounted unit with ventilation component installed between wall studs in basement utility area. Noted significant moisture damage and water staining on concrete floor surface near equipment location, documented conditions with photographs for customer awareness and future monitoring.
Mount Vernon, IN 47620
