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
Luke O.
Completed dismissed visit for planned HVAC maintenance on single-system residential installation. Documented Lennox CR33-30/36B-F refrigerant evaporator and furnace system with water heater in mechanical room, verified equipment labeling and specifications, and confirmed all components accessible for future service needs.
Mount Vernon, IN 47620
Christian C.
Completed planned maintenance on 8-year-old residential HVAC system under Gold Level service agreement. Performed comprehensive inspection of furnace unit, examining heat exchanger assembly, blower motor, electrical connections, and control board. Replaced 16x25x5 air filter as part of routine maintenance protocol. All components inspected and found to be in functional condition with normal operational wear. System operating within manufacturer specifications at time of service completion.
Mount Vernon, IN 47620
Luke O.
Completed comprehensive cooling season maintenance on 12-year-old Carrier HVAC system per annual maintenance agreement. Performed full AC tune-up including inspection of indoor furnace components, verification of refrigerant levels, cleaning of outdoor condensing unit, and testing of all system operations. System found to be operating properly with all components functioning within normal parameters; no repairs required at this time.
Mount Vernon, IN 47620
Luke O.
Completed comprehensive Platinum Level maintenance on single-zone Lennox HVAC system during second annual visit. Performed full inspection and servicing of indoor furnace unit located in basement mechanical room and outdoor condensing unit positioned on exterior concrete pad. Replaced 16x25x5 air filter and conducted complete system performance evaluation. Inspected all electrical connections, refrigerant lines, condensate drainage, and ductwork connections. Verified proper operation of both heating and cooling components. Checked thermostat calibration and system controls for optimal performance. Cleaned condenser coils on outdoor unit and cleared area of debris. Inspected PVC venting and flue connections on furnace. Tested safety controls and confirmed all equipment operating within manufacturer specifications. System is one year old and performing efficiently. Customer due for renewal of maintenance agreement.
Mount Vernon, IN 47620
Ian H.
Responded to install callback for system not running. Upon inspection, discovered faulty flame sensor with heavy contamination preventing proper operation. Removed, cleaned, and reinstalled sensor, restoring full system functionality and verifying proper heating cycle operation.
Mount Vernon, IN 47620
Kyle D.
Performed scheduled tankless water heater flush as part of preventative maintenance plan at no additional charge. Accessed exterior-mounted tankless unit through weathered wood panel enclosure, completed descaling flush procedure to remove mineral buildup and maintain optimal heat exchanger efficiency. Verified proper operation of isolation valves and confirmed unit functionality upon completion.
Mount Vernon, IN 47620
Luke O.
Completed monthly planned maintenance on 6-year-old Rheem HVAC system. Serviced indoor air handler unit located in utility closet and outdoor condensing unit positioned on concrete pad against exterior brick wall. Replaced 20x20x1 polarized air filter, inspected condensate drain lines and PVC piping for proper operation, and verified all electrical connections. Cleaned outdoor condenser coils, checked refrigerant levels, and confirmed fan motor operation on both indoor and outdoor units. System operating within normal parameters with no issues identified.
Mount Vernon, IN 47620
Luke O.
Completed monthly Gold Level preventive maintenance on 11-year-old single system. Inspected outdoor condenser unit, verified proper operation of all components, and documented equipment condition with photographs. Unit operating within normal parameters with no immediate service needs identified. Customer requested callback for credit card information update.
Mount Vernon, IN 47620
Tyler C.
Completed Platinum Level maintenance on single HVAC system. Performed comprehensive system inspection and diagnostics, including thermostat functionality verification and electrical measurements. Recorded amperage readings of 45.1A and 1.3A at outdoor unit using clamp meter on power and control wiring. Confirmed system operating parameters within normal range. Filter noted as 20x25x5 size with 3-year service life; no debris collection required at this time. System control hardware and software revisions documented from thermostat interface. All components inspected and found operating properly with no deficiencies noted.
Mount Vernon, IN 47620
Tyler C.
Completed scheduled AC tune-up and preventive maintenance service on residential air conditioning system. Performed comprehensive system diagnostics including electrical measurements using clamp meter, which indicated 220.6V supply voltage and 7.0A current draw within normal operating parameters. Verified smart thermostat connectivity and Wi-Fi network connection functioning properly with all system settings accessible through digital interface.
Mount Vernon, IN 47620
Tyler C.
Completed dismissed visit for planned single maintenance on one-year-old HVAC system. Documented thermostat settings and system information, including model 107088-01 with software revision 4.40.0413, confirming proper operation and interface functionality. System filter size confirmed as 20x25x5 for future reference.
Mount Vernon, IN 47620
Tyler C.
Responded to callback for recently installed system experiencing short cycling, evaporator coil freeze-up, and blower motor making metal-on-metal noise. Upon arrival, inspected outdoor unit and identified failed dual-run capacitor causing improper compressor and condenser fan operation. Replaced defective capacitor with properly rated unit, verified all electrical connections, and tested system operation. Unit now running within normal parameters with no abnormal sounds and proper cooling cycle restored.
Mount Vernon, IN 47620
Brock B.
Completed scheduled HVAC maintenance on Goodman model A5X18031TAB outdoor condensing unit operating at 208-230V. Performed comprehensive system tune-up including inspection of compressor, condenser coil, fan motor operation, and electrical connections. Verified proper refrigerant pressures and system performance. Checked Honeywell ProSeries thermostat functionality, confirmed accurate temperature readings and cooling mode operation. Unit showed normal outdoor weathering consistent with exterior installation; all components operating within manufacturer specifications upon completion of maintenance.
Mount Vernon, IN 47620
Brock B.
Completed annual Platinum Level maintenance on a 6-year-old HVAC system with 16x20x5 filter configuration during first scheduled visit. Verified thermostat operation and system controls, documented significant dirt and debris accumulation in return air area requiring attention to maintain optimal system performance and indoor air quality.
Mount Vernon, IN 47620
Brock B.
Responded to customer complaint of loud noise from outdoor condensing unit on 12-year-old residential HVAC system. Performed diagnostic evaluation of condenser operation and connected manifold gauge set to measure refrigerant pressures and assess system performance. Conducted visual and operational inspection of outdoor unit components to identify source of abnormal noise during runtime.
Mount Vernon, IN 47620
Brock B.
Completed annual Gold Level maintenance on 10-year-old HVAC system for new maintenance member. Installed new FILTERBUY pleated air filter and performed comprehensive system inspection with temperature differential readings measuring 54.6 degrees, confirming proper system operation and airflow efficiency.
Mount Vernon, IN 47620
Cole B.
Completed installation of a 4-ton, 17 SEER split system with 80% AFUE upflow furnace in residential attic space. Mounted air handler unit on attic floor with proper clearances and secured all ductwork connections. Installed new control board with proper wiring connections including power, thermostat, and safety circuits using color-coded wiring to terminal blocks. Routed flexible ductwork throughout attic space to supply registers, ensuring proper support and insulation wrap on all duct runs. Verified all electrical connections at control board, tested system operation, and confirmed proper airflow through distribution system.
Mount Vernon, IN 47620
Ian H.
# HVAC System Installation Completed full HVAC system installation in residential basement utility area, including 3-ton air conditioning unit with 18 SEER rating and 99% AFUE upflow furnace configuration. Installation included new ductwork routing throughout basement ceiling space, proper integration with existing infrastructure including water heater and electrical systems, and all necessary refrigerant lines and condensate drainage. System tested and verified operational upon completion.
Mount Vernon, IN 47620
Brent D.
Completed annual platinum-level preventive maintenance on a single HVAC system installed in February 2026. Performed comprehensive inspection of control board wiring, connections, and electrical components, verifying proper circuit board operation and secure wire routing throughout the system. Measured and documented supply air temperature at 63°F, confirmed all electrical connections at control panel, and collected filter size information for future service requirements.
Mount Vernon, IN 47620
Brent D.
Completed first scheduled quarterly maintenance visit on HVAC system. Inspected and photographed control board assembly showing proper operation of all electronic components, sensor connections, and terminal blocks. Verified Lennox S40 smart thermostat functionality with successful Wi-Fi connectivity to NETGEAR72 network and confirmed communication pathway through internet service provider to server. Replaced 16x25x5 air filter as part of routine three-month maintenance protocol.
Mount Vernon, IN 47620
