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.
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.
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 January 2026 and February 2026.
The most recent job was on February 20, 2026.
Job Locations and Reviews
Completed promotional tanked water heater flush service on an A.O. Smith water heater located in utility area. Performed standard maintenance procedure to remove sediment and mineral buildup from tank to improve efficiency and extend equipment life. Documented pre/post service condition with photos showing the unit's installation configuration and proper functioning after maintenance.
Completed Platinum Level maintenance service on a Lennox furnace system. Replaced the 20x25x5 air filter that was due for its 3-year replacement. This was the second visit of the annual maintenance plan, which has been renewed as requested.
Completed Gold Level maintenance service on a 4-year-old HVAC system during initial visit. Inspected attic-installed air handler unit, associated ductwork, and connections - all components appear properly installed and in normal working condition with no visible damage or leaks. Replaced 16x25x5 home filter as part of scheduled maintenance protocol.
Performed routine second visit maintenance on 8-year-old HVAC system per Gold Level agreement. Inspected furnace unit, checked all connections including black insulated tubing, PVC pipes, and copper lines. Replaced 20x20x1 filter and verified proper operation of all components. System is functioning within specifications; renewal recommended.
Completed follow-up leak detection service on HVAC system as requested in previous incomplete maintenance visit. Performed comprehensive inspection of copper refrigerant lines and brass fittings, focusing on connection points where oxidation was observed. System appears functional with normal wear on components; documentation includes detailed photographs of the refrigerant piping assembly for reference.
Successfully installed a complete Green2T 18/99 Lennox HVAC system at the Mt Vernon location, including indoor furnace with PVC ventilation and outdoor condensing unit positioned on concrete pad. System was properly connected to existing electrical service and photographed for documentation purposes.
Responded to no heat call for 6-year-old system with no airflow from vents. Diagnosed issue with thermostat communication and verified furnace operation by accessing control panel, where blue flames were observed indicating proper gas ignition. Restored heating functionality and confirmed system operation before completing service.
Diagnosed communication failure in outdoor unit. Identified faulty control board as source of system malfunction. Documented model/serial information and photographed PCB with connected wire harnesses for accurate part ordering. Customer Randy Gillenwater to be available after 1:30pm for installation once replacement board arrives.
Completed platinum level maintenance on residential HVAC system. Replaced 16x25x5 filter as part of monthly service schedule. Observed significant corrosion and rust around the furnace's circular port and base panel, indicating possible moisture issues that should be monitored.
Conducted comprehensive assessment of two aging outdoor HVAC units mounted on concrete base adjacent to brick exterior wall. Units showed signs of deterioration requiring replacement, with visible Schneider-branded system and secondary white unit both evaluated. Documented electrical connections including disconnect boxes and conduit configuration for proper replacement planning. Customer (Tonya) confirmed non-operational system status and expressed interest in replacement options only, not repairs.
Responded to a no-heat service call for a 6-year-old system that had power but wasn't functioning. Diagnosed and replaced a faulty relay switch that was preventing system operation. System is now operating normally with proper airflow through vents, restoring heat to the residence.
Performed annual platinum maintenance on 3-year-old system. Replaced 16x25x5 filter, inspected outdoor condensing unit, verified proper refrigerant levels, and cleaned coils. Customer renewed service agreement for continued coverage.
Conducted comprehensive inspection of existing HVAC system for replacement estimate. Current installation includes standard efficiency furnace with PVC exhaust venting and connected water heater system. Documented equipment condition and space configuration to prepare appropriate sizing and installation requirements for new high-efficiency system.
Successfully installed a complete Lennox HVAC system, including a 15.5 SEER, 97% efficiency furnace in customer's utility area with proper PVC venting. Outdoor condenser unit was placed on concrete pad with appropriate electrical connections and insulated refrigerant lines running to the indoor unit.
Completed annual platinum maintenance on 7-year-old HVAC system. Replaced 20x25x5 filter, performed thorough inspection of furnace components including electrical connections and circuit boards. Cleaned accessible areas of dust/cobwebs in utility area. System functioning properly; customer renewed maintenance agreement for next scheduled service in April 2025.
Responded to service call for 20+ year old HVAC system that was completely non-operational with no airflow through vents. Visual inspection revealed significant deterioration of components including compromised ductwork and outdated PVC drain lines. System requires full replacement due to age and condition.
Responded to no-heat call for 20+ year old system that was completely non-operational. Diagnosed failed control board causing system to remain unresponsive despite thermostat showing active heating call. Replaced control board and verified proper operation with normal airflow restored through all vents.
Conducted replacement estimate for non-functional boiler system in 5000 sq ft residence. Inspected existing equipment including aging blue boiler unit with metal exhaust ductwork and adjacent water heater. Noted exterior natural gas meter installation with PVC piping showing exposure to winter elements and weathered building exterior. Discussed potential replacement options and repair alternatives with homeowner.
Conducted initial assessment for HVAC replacement quote. Inspected electrical panel to verify available capacity and breaker configuration for new system. Evaluated existing thermostat compatibility and placement for potential upgrade during replacement.
Responded to no-heat call for 26+ year old system with customer complaint of burning smell, moisture on filter, and no airflow. Upon inspection of the aging furnace unit housed in utility closet, diagnosed failed components causing the burning odor. System was previously shut down by homeowner due to safety concerns. Recommended replacement options given system age and condition.
