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
Mount Vernon, IN at a glance
A+ Derr Heating & Cooling has completed 20 jobs in Mount Vernon, IN between February 2026 and March 2026.
The most recent job was on March 20, 2026.
Job Locations and Reviews
Nick B.
Conducted a comprehensive evaluation of a 40-year-old HVAC system that has ceased functioning. Inspection revealed a severely weathered outdoor condenser unit showing significant dirt accumulation and deterioration, positioned on decorative landscape rocks adjacent to the residence's exterior. Further assessment of the crawlspace identified an aging furnace installation with insulated ductwork requiring replacement. Documented existing system conditions with photographs to support replacement recommendations.
Mount Vernon, IN 47620
Cole B.
Conducted follow-up inspection of unfinished basement area with exposed ceiling joists to assess incomplete gas line installation work. Documented existing utility infrastructure including electrical panel, water pressure tank, and filtration system. Observed partially removed ceiling panels revealing metal framing elements and electrical wiring that will require consideration during gas line completion.
Mount Vernon, IN 47620
Brent D.
Completed annual Platinum Level maintenance on Lennox HVAC system installed 12/9/25. Inspected ECM drive circuit board connections and wiring integrity, noting all terminals secure and properly labeled. Examined ductwork system in utility area, confirming proper seals at joints with no visible leaks or damage. Replaced 20x25 filter as part of scheduled first visit maintenance protocol.
Mount Vernon, IN 47620
Nick B.
Completed detailed assessment of existing HVAC system replacement options in home with crawl space installation. Evaluated current ductwork configuration and insulation quality, noting the silver foil-wrapped ducts and existing spray foam insulation in the utility area. Verified functionality of current White-Rodgers digital thermostat (displaying 72°F) and discussed energy-efficient replacement alternatives with homeowner present during the 1-1.5 hour consultation.
Mount Vernon, IN 47620
Jake T.
Conducted comprehensive assessment of existing packaged HVAC system with natural gas heat exchanger showing signs of failure. Unit is currently operational but approaching end of life cycle. Inspected exterior components and refrigerant lines, documented current installation conditions, and provided replacement options for complete system versus heat exchanger repair. Additionally discussed duct cleaning service as requested by homeowner.
Mount Vernon, IN 47620
Christian C.
Completed second visit of Gold Level maintenance on 5-year-old HVAC system. Inspected outdoor unit's electrical compartment, checking capacitors and wiring connections for proper function. Examined indoor furnace components and ductwork in utility room, verifying system operation. Replaced 16x20x5 filter and discussed annual renewal options with customer.
Mount Vernon, IN 47620
Ricky B.
Completed annual maintenance visit on residential HVAC system (furnace installed 3/10/25). Performed comprehensive service on outdoor condensing unit, including inspection of internal components with access panels removed. Replaced 16x25x2 air filters. Customer's maintenance agreement is due for renewal.
Mount Vernon, IN 47620
Cole B.
Successfully installed and commissioned a 22kW Generac generator system. Verified proper gas connection, inspected flame pattern for optimal combustion, and completed all necessary electrical connections. Final inspection confirmed system is operational and ready for standby power needs.
Mount Vernon, IN 47620
Craig U.
Completed annual maintenance on 20-year-old Lennox HVAC system as part of Gold Level service agreement (1st visit). Inspected furnace and associated ductwork in basement utility area; system is installed adjacent to Lochinvar water heater. Replaced air filter in CFI filtration system and performed standard preventative maintenance procedures. System is functioning within normal parameters despite age; documented current condition with photos for service record.
Mount Vernon, IN 47620
Craig U.
Responded to callback for upstairs HVAC unit with cooling issues and outdoor unit freezing. Diagnosed recurring electrical control problems in the Lennox system. Performed comprehensive system check of the previously replaced outdoor control board and condenser fan motor, verified proper wiring connections, and confirmed system operation through complete cycle testing.
Mount Vernon, IN 47620
Christian C.
Completed monthly maintenance service on Platinum Level HVAC system. Replaced 20x20x2 filter and performed standard system inspection. Unit is in good working condition with proper drainage and no visible issues observed during service.
Mount Vernon, IN 47620
Isaac G.
Diagnosed and replaced failed sump pump in basement utility area, ensuring proper installation of new unit with connections to existing PVC discharge piping. Tested system operation to confirm adequate water removal and proper cycling, restoring basement flood protection.
Mount Vernon, IN 47620
Nick B.
Conducted a generator installation estimate at residential property, noting severely corroded gas piping that will require replacement prior to generator installation. Observed existing gas meter configuration and documented current plumbing conditions to incorporate necessary repairs into comprehensive generator installation proposal.
Mount Vernon, IN 47620
Isaac G.
Successfully installed a complete water filtration system on the basement utility wall, including mounting the cylindrical black filter housing with proper wall anchors and connecting it to the existing plumbing with new PVC piping. System features integrated monitoring components and manual control valves, all properly sealed and tested to ensure optimal water quality and zero leaks.
Mount Vernon, IN 47620
Nick B.
Conducted comprehensive HVAC replacement estimate for customer who recently purchased home with aging system requiring replacement before move-in. Inspection revealed significant system deterioration, including severe corrosion and rust penetration in metal ductwork/piping, as well as moisture damage to surrounding ceiling/wall structures with visible decay. Documented critical areas of concern with photographic evidence for inclusion in replacement proposal.
Mount Vernon, IN 47620
Brock B.
Performed scheduled platinum level maintenance on system. Replaced faulty door switch as previously noted during earlier service call. Tested electrical components and verified proper voltage readings (258V). Replaced air filters (24x25x2 and 1"). Identified and documented corrosion on pipe elbow joint that will require monitoring. All systems now operating normally.
Mount Vernon, IN 47620
Justin M.
Completed planned maintenance on Gold Level home with three systems. Inspected Unit #1 (installed 8-7-18) and Unit #2, verified proper operation with thermostat reading 61°F with heat functioning. All systems received standard filter replacement and operational checks as part of the second annual visit; renewal recommended.
Mount Vernon, IN 47620
Nick B.
Conducted comprehensive HVAC replacement estimate at vacant property undergoing complete renovation. Assessed existing system requirements and evaluated structural considerations in basement area with exposed stone/brick walls, open ceiling joists, and ongoing construction. Documented site conditions to develop appropriate recommendations for new HVAC installation compatible with the extensive remodeling project.
Mount Vernon, IN 47620
Drew C.
Performed diagnostic service on 20-year-old heating system that was blowing cold air only. Inspected electrical connections at terminal block, focusing on the red and copper wires. Verified proper wire seating and connection integrity at terminal points. System was operational with home temperature at 60°F after service completion.
Mount Vernon, IN 47620
Christian C.
Performed annual maintenance on 1-year-old Lennox system (Model CK40CT-36B-01) as part of Platinum Level service plan. Inspected interior components including circuit board, motor assembly, and electrical connections - all found in normal working condition with no signs of damage or corrosion. Documented equipment specifications and confirmed proper R-410A refrigerant configuration.
Mount Vernon, IN 47620
