Louisville Service Overview
- Local Priority: A+ Derr proudly provides four core trades—heating, cooling, plumbing, and electrical—across Shively, St. Matthews, Hurstbourne, Indian Hills, Middletown, Jeffersontown, Old Louisville, and the Highlands.
- Certified Expertise: We offer complete multi-trade services, handling historic boiler repairs and panel upgrades near the urban core to EV charger installations and high-efficiency heat pumps in eastern Jefferson County.
- Efficiency Focus: Our technicians understand the specific mechanical differences between century-old Highlands properties with narrow spaces and expansive newer homes beyond the Watterson Expressway and Gene Snyder Freeway
From older homes along Bardstown Road and Dixie Highway to newer neighborhoods beyond the Watterson Expressway, Louisville properties place different demands on their heating, cooling, plumbing, and electrical systems. A+ Derr serves homeowners throughout Louisville, including Shively, St. Matthews, Hurstbourne, Indian Hills, Middletown, and Jeffersontown. With technicians and service vehicles operating across the city every day, help is never far away.
“Definitely had no complaints from start to finish. From sales to install date everyone was professional and friendly. Definitely recommend giving them a chance. New system works and sounds great. Brad did a great job from the sales side and very personal and professional. Tanner was professional, great and knowledgeable. Definitely a great team they have there.”
Donald B.
Need an experienced HVAC contractor, plumber, or electrician in Louisville, KY? Call 833-232-4328 or contact us online today!
Heating, Cooling, Plumbing & Electrical Services Built for Louisville, KY
Louisville is one of A+ Derr’s primary operating markets. Our technicians regularly travel between neighborhoods near the Ohio River, the University of Louisville, Iroquois Park, Shelbyville Road, Bardstown Road, and the growing communities east of the Gene Snyder Freeway.
That daily presence matters because Louisville does not have one standard type of home. Properties near Old Louisville and the Highlands may have narrow mechanical spaces, older pipes, aging electrical panels, and ductwork added long after construction. Homes in Middletown, Hurstbourne, and Jeffersontown often have newer infrastructure, larger floor plans, and greater demand for high-efficiency systems, EV chargers, smart controls, and backup power.
A+ Derr also supports local organizations, including the Louisville Bats, Louisville City FC, and the Animal Care Society. We live and work in the same region as our customers, and we understand the conditions Louisville homes face throughout the year.
Louisville Home Comfort Problems & Proven Solutions
Problem: Historic homes in Old Louisville, NuLu, and the Highlands feature original architecture, converted rooms, and restrictive ductwork that cause severe second-floor heat in summer and uneven winter heating.
Solution: A+ Derr designs custom multi-trade solutions, combining high-efficiency heat pumps, ductless mini-splits, boiler services, and airflow balancing to deliver modern comfort while preserving structural integrity.
Problem: Aging electrical panels and limited circuit capacity in older properties along Bardstown Road, Shively, and Dixie Highway cannot support modern appliances, kitchen remodels, or new HVAC installations.
Solution: Our licensed electricians evaluate total power capacity to complete electrical panel upgrades, meter upgrades, rewiring, surge protection, and dedicated circuits.
Problem: Heavy seasonal downpours and low-grade foundations across Jefferson County lead to basement flooding, sewer line backups, and drainage failures.
Solution: Our master plumbers install and service primary sump pumps, clear restrictive drain lines, replace failing water heaters, and execute repiping projects.
Problem: Persistent summer humidity along the Ohio River combined with sudden winter cold snaps strains HVAC systems, reducing efficiency and driving up energy bills.
Solution: We install whole-home dehumidifiers, air purifiers, variable-speed heat pumps, and high-efficiency furnaces to manage moisture and maintain consistent indoor comfort year-round
Furnace Repair & Boiler Service for Louisville’s Changing Winters
Louisville winters often move between mild afternoons, freezing nights, rain, ice, and sudden cold snaps. Those swings can force furnaces and heat pumps to cycle frequently, especially in drafty homes near the urban core or larger properties in eastern Jefferson County.
A+ Derr provides:
- Furnace repair for Louisville cold snaps
- Heating installation for older floor plans
- System replacement for aging urban homes
- Maintenance before Jefferson County freezes
- Boiler service for historic properties
- Heat pumps for Kentucky’s changing seasons
- Mini-splits for attics and additions
- Geothermal options for larger properties
- 24- Hour Emergency heating across Louisville
- Air quality help for dry winter homes
Homes near Bardstown Road, Shively, and Iroquois Park may have additions, converted rooms, or duct systems designed for an earlier floor plan. A+ Derr checks the equipment, airflow, insulation, and home layout before recommending a repair or replacement, which helps prevent homeowners from investing in a new system that leaves the original comfort problem unresolved.
“We were very satisfied with our installers, Brian Abbott and Keith. They installed air conditioning unit and furnace. They answered all questions asked, very knowledgeable. We highly recommend A+ Derr Heating and AC to do your next job.”
Rhonda S.
Emergency AC Repair & Humidity Control Along the Ohio River
Louisville summers are hot and humid, with long stretches when air conditioners run throughout the day. The city’s moisture levels can make indoor air feel uncomfortable even when the thermostat reaches its setting. Homes near the Ohio River may notice persistent humidity, while upper floors in older neighborhoods often remain warmer because of limited insulation or restrictive ductwork.
Our cooling services include:
- AC repair during humid Louisville summers
- Cooling installation for multi-level homes
- AC replacement for aging city properties
- Maintenance before peak summer heat
- Mini-splits for hot upstairs rooms
- Heat pumps for year-round comfort
- Dehumidifiers for Ohio River moisture
- Air purifiers for pollen and dust
- Duct cleaning for older Louisville homes
- Insulation for hot attics
- Emergency cooling across Jefferson County
A historic home near Cherokee Park may need duct or insulation improvements to cool the second floor, while a larger home in Indian Hills or Hurstbourne may benefit from zoning, airflow corrections, or humidity control. Our technicians evaluate the entire cooling system instead of assuming the outdoor unit is the only source of the problem.
“A+ Derr did a great job installing my new gas furnace and 17 SEER air-conditioning unit. They were very professional, kind, and efficient. I look forward to using my new HVAC system in my new home. They also installed a similar unit in my current home about three years ago. The maintenance team on that system has been wonderful and Alfonso has been especially kind. Thank you, Tanner, for installing my new unit and keeping me up-to-date with how the installation was going.”
Debra P.
Is your air conditioner struggling with Ohio River humidity or cold winter freezes? Call 833-232-4328 to book high-efficiency heating and cooling service!
Louisville Plumbing Services: Sump Pumps, Water Heaters & Drain Repair
Louisville’s plumbing infrastructure reflects decades of residential growth. Older properties near Downtown, NuLu, the Highlands, and south Louisville may contain aging supply lines, remodeled bathrooms, narrow drains, or piping installed during several different renovations. Newer homes can still experience clogged drains, failed water heaters, leaking fixtures, and sump pump problems.
A+ Derr provides:
- Leak repair in older Louisville homes
- Plumbing installation for local remodels
- Maintenance for aging city pipes
- Water heaters for busy households
- Tankless systems for limited spaces
- Sump pumps for Louisville basements
- Drain service for older sewer lines
- Garbage disposal repair and replacement
- Toilet repair for recurring problems
- Repiping for outdated plumbing materials
- Water filtration for Louisville homes
Heavy rain can expose drainage weaknesses around Louisville homes, especially those with basements or foundations below the surrounding grade. A worn sump pump, blocked discharge line, or recurring sewer problem can quickly lead to water damage. Our plumbers identify the source and explain whether a focused repair or broader plumbing upgrade offers the stronger long-term solution.
Electrical Panel Upgrades, Wiring & EV Chargers in Jefferson County
Many Louisville homes were built before modern electrical use became standard. Older properties near Old Louisville, Shively, and the Highlands may have limited circuits, outdated panels, or wiring altered during past renovations. Newer homes around Middletown and Jeffersontown often need added capacity for EV chargers, home offices, connected equipment, and larger appliances.
Our electrical services include:
- Electrical repair in aging Louisville homes
- Wiring for remodels and additions
- Panel upgrades for older neighborhoods
- Meter upgrades for increased demand
- Circuits for kitchens and home offices
- Outlet service for renovated properties
- EV chargers in eastern Louisville
- Generators for storm-related outages
- Surge protection for home electronics
- Lighting for homes and businesses
- Commercial lighting across Louisville
An older home near Bardstown Road may need a panel upgrade before a new HVAC system or kitchen appliance can be added. A newer property beyond the Watterson may require an EV charger, generator connection, or additional circuits. A+ Derr evaluates the home’s existing capacity before completing the installation, helping reduce overloaded circuits and future electrical problems.
Need an electrical panel upgrade or sump pump repair in Louisville? Call our multi-trade specialists at 833-232-4328 for fast, professional service!
Serving Louisville ZIP Codes: From the Highlands to Middletown
Louisville covers a large area, from Downtown and the Highlands to Shively, St. Matthews, Middletown, Jeffersontown, and neighborhoods near the Gene Snyder Freeway. A+ Derr provides heating, cooling, plumbing, and electrical service across the Louisville area, including homes and businesses in many of Jefferson County’s primary residential ZIP codes.
Our Louisville service area includes:
- 40202, 40203, and 40204
- 40205, 40206, and 40207
- 40208, 40209, and 40210
- 40211, 40212, and 40213
- 40214, 40215, and 40216
- 40217, 40218, and 40219
- 40220, 40222, and 40223
- 40228, 40229, and 40241
- 40242, 40243, and 40245
- 40258, 40272, 40291, and 40299
Each ZIP code contains its own mixture of home ages, construction styles, neighborhoods, and system needs. A property near Downtown Louisville may require a different HVAC, plumbing, or electrical approach than a newer home in eastern Jefferson County.Â
Why Louisville Homeowners Choose A+ Derr
Louisville homeowners need more than a company that places the city name on a service page. They need technicians who understand how a century-old Highlands home differs from a newer property in Middletown, how humidity affects comfort near the river, and why heavy rain makes sump pump performance important.
Customers choose A+ Derr for:
- Daily service coverage across Louisville
- Experience with historic city homes
- Support for newer eastern neighborhoods
- Four home trades under one company
- Emergency HVAC service in Jefferson County
- Solutions for local weather conditions
- Clear recommendations for aging systems
- Active Louisville community involvement
Whether your home sits near Dixie Highway, Shelbyville Road, Bardstown Road, the Watterson Expressway, or the Gene Snyder Freeway, our team can provide service based on the needs of your property and neighborhood.
Schedule Home Services in Louisville, KY Today
A failed air conditioner during a humid July afternoon, a furnace problem during a sudden freeze, a sump pump concern after heavy rain, or an overloaded panel in an older home all require timely attention. A+ Derr provides complete heating, cooling, plumbing, and electrical service throughout Louisville and Jefferson County.
Serving the Highlands, St. Matthews, Middletown, Shively, and all of Jefferson County. Call 833-232-4328 to schedule your service with A+ Derr!
Louisville HVAC & Plumbing FAQs
Why do older Highlands and St. Matthews homes benefit from zoning or mini-splits?
Multi-story and shotgun floor plans frequently suffer from uneven airflow[cite: 10]. Zoning uses dampers and dedicated thermostats—or supplemental ductless mini-splits—so upper levels cool comfortably in summer without over-cooling the main floor[cite: 10].
What indoor humidity level should I target during Ohio Valley summers?
Aim for 40% to 50% relative humidity. Persistent river moisture makes indoor air feel warm even when the thermostat hits its target[cite: 10]. Combining your AC with a whole-home dehumidifier improves comfort and energy efficiency[cite: 10].
Can a heat pump handle Louisville's changing winter weather?
Yes. Modern heat pumps provide efficient cooling and economical heating during mild spring and fall conditions[cite: 10]. Many homeowners opt for a dual-fuel setup that pairs a heat pump with a gas furnace for deeper winter freezes[cite: 10].
Why do older Louisville homes require electrical panel upgrades before adding new HVAC systems?
Properties in older neighborhoods like Old Louisville, Shively, or the Highlands often have limited circuit capacity[cite: 10]. Upgrading your electrical panel ensures your home can safely support modern HVAC units, EV chargers, or kitchen remodels without tripping breakers[cite: 10].
Why is sump pump maintenance critical for Louisville basements?
Heavy seasonal rainstorms put significant pressure on home foundations across Jefferson County[cite: 10]. Routine inspections ensure primary sump pumps and discharge lines work properly during heavy storms, preventing costly water damage[cite: 10].
What is considered an HVAC or plumbing emergency in Louisville?
Complete loss of heat/cooling during extreme weather, burning odors, repeated breaker trips, or standing water near electrical and plumbing fixtures require immediate attention[cite: 10]. Shut the system down and contact us right away[cite: 10].
Page Updated on August 10, 2026
Recent Jobs and Reviews in Louisville, KY
Job Locations and Reviews
Completed scheduled AC tune-up and preventive maintenance under active membership plan. Performed comprehensive system diagnostics including temperature differential measurements using Klein Tools digital thermometer and electrical performance testing with UEi DL489 True RMS multimeter, recording amperage draw of 1.18A and voltage reading of 0.279V at tested components. All systems operating within normal parameters with no deficiencies noted.
Completed full HVAC system installation including new furnace unit (Model ML196DFO7OXE488K-01) with LP conversion kit and comprehensive ductwork installation throughout the property. Installed new galvanized sheet metal rectangular ductwork in basement area with proper junction connections and flexible connector tubing to ensure optimal airflow distribution and system efficiency.
Completed comprehensive estimate for mini split system installation at residential property. Evaluated existing electrical panel capacity and available breaker spaces to ensure adequate power supply for proposed ductless heat pump system. Assessed garage area for potential indoor unit placement and outdoor unit location, documenting site conditions and spatial requirements for equipment installation.
Installed washer supply box with two ball valve shut-offs and ran new water supply lines through interior walls to the box location. Ran drain line from existing 4-inch cast iron stack to washer box, requiring drilling through wood framing and cutting multiple access openings in drywall for pipe routing. Addressed multiple leaks on existing shower valve installation at threaded brass fittings and SharkBite connections, with customer acknowledging no warranty would be provided on owner-supplied parts or previously completed work. All PEX water supply lines were properly secured and connected with brass fittings. One-year warranty provided on washer box installation and associated plumbing work only.
Responded to no cooling call on residential HVAC system less than 10 years old. Upon arrival, verified thermostat was functioning but air handler and outdoor unit were not responding. Inspected electrical panel and confirmed no tripped breakers at main distribution box. Examined indoor air handler unit and identified complete system failure with no fan operation or compressor engagement. Diagnosed electrical supply issue preventing power delivery to HVAC equipment, traced wiring, and restored proper system operation.
Responded to water leak complaint on 8-month-old HVAC system located in upstairs closet area. Upon inspection, identified active water seepage from L-shaped condensate drain pipe and dripping from rear of air handler unit. Observed significant water staining on attic floor plywood near equipment, indicating ongoing moisture intrusion since January. Documented visible water damage patterns and compromised drainage system. Photographed affected areas showing water flow patterns across flooring and PVC condensate line configuration for warranty documentation purposes.
Completed platinum-level preventive maintenance on one rooftop HVAC system approximately one year old. Accessed unit via ladder with two technicians, replaced 20x20x4 air filter, performed comprehensive system inspection including electrical testing with multimeter, verified all operational parameters, and documented equipment condition with photographs. System operating within normal specifications with no deficiencies noted.
Completed scheduled preventive maintenance on residential air conditioning system. Performed comprehensive AC tune-up including inspection of air handler unit, verification of proper airflow through ductwork, and temperature diagnostics measuring supply air at 75.2°F. All system components found operating within normal parameters with no issues identified. Equipment labels and safety warnings verified intact and legible. System cleared for continued operation with next maintenance due in 2026.
Completed scheduled preventive maintenance on residential air conditioning system. Performed comprehensive AC tune-up including inspection of electrical components, contactors, and capacitor within control panel. Verified system operation with amperage readings at 49.8 amps using digital multimeter. All electrical connections tested and found secure, though control panel showed normal weathering consistent with outdoor installation. System operating within manufacturer specifications with no issues identified or repairs required at time of service.
Responded to service call for leaking shower head in modern tiled shower installation. Upon inspection, evaluated Delta brand shower control panel with integrated handheld showerhead holder and flexible braided stainless steel hose. Diagnosed source of leak, performed necessary repairs to shower head assembly, and tested system for proper operation and water-tight seal. Confirmed no further leakage and restored shower to full functionality.
Successfully installed a Navien 240A2 tankless water heater system in the basement utility area, mounted on concrete block wall with proper venting through white PVC exhaust piping. Completed all hot and cold water supply connections using color-coded PEX tubing (red, blue, and yellow lines) with secure fittings to the unit's inlet and outlet ports. Configured digital control panel settings and verified proper operation of the tankless system. Unit is covered by a 5-year heat exchanger warranty and lifetime jacket warranty for the tankless components.
Completed equipment assessment and replacement estimate for aging HVAC system including upstairs furnace (30+ years old, closet-mounted) and upstairs air conditioning unit (27 years old, exterior installation). Both systems evaluated for proactive replacement due to age rather than active failure. Documented existing outdoor condenser unit positioned on concrete pad against building exterior with electrical disconnect present. Identified mercury-containing thermostat requiring proper disposal procedures during replacement. Photographed current equipment configuration and provided comprehensive replacement options for complete system upgrade.
Completed full HVAC system installation in residential mechanical closet, including new Lennox furnace unit with associated gas line, venting, and ductwork connections. Installation included proper routing of yellow-jacketed gas supply line, white PVC condensate drainage and venting system, flexible aluminum ductwork, and electrical conduit within confined utility space featuring exposed brick wall construction. All components secured with appropriate mounting brackets and fittings, ensuring code-compliant integration with existing water heater and utility infrastructure in basement mechanical room.
Completed planned maintenance visit on outdoor HVAC unit after previous dismissal due to tenant access restrictions. Performed electrical system inspection, verified component connections and relay operation, and measured system amperage at 33.02A indicating normal operating parameters. Unit operating within manufacturer specifications with all electrical connections secure and properly grounded.
Responded to complaint of excessive moisture and mold growth on bathroom exhaust vent grille. Inspected attic space above bathroom and located exhaust fan termination point. Found inadequate ventilation routing with condensation accumulation in ductwork due to improper insulation and potential disconnection or damage to exhaust termination. Documented attic conditions including insulation coverage and duct configuration for recommended repairs to resolve moisture infiltration issue.
# HVAC Maintenance Completed Performed comprehensive Platinum Level planned maintenance on a 4-year-old single HVAC system. Conducted thorough inspection of all system components, including temperature diagnostics using calibrated digital measuring equipment to verify proper operational parameters at 64°F. Performed electrical testing and measurements using clamp meter on outdoor condenser unit to assess current draw and voltage levels, ensuring all electrical components were operating within manufacturer specifications. Replaced 16x25x5 air filter to maintain optimal airflow and system efficiency. Inspected copper refrigerant lines, insulation, and all accessible mechanical components for signs of wear or potential issues. All system parameters tested normal, and unit is operating efficiently for continued reliable performance.
Completed comprehensive ductwork installation in attic space, including routing and securing flexible aluminum ductwork throughout the structural framework to support new HVAC system. Installed Trane heating and cooling unit with proper connections to the duct network, ensuring adequate airflow distribution. Added reflective insulation material along exposed sections and installed white rectangular air register with horizontal slats for optimal air delivery. All ductwork properly secured to wooden joists and beams, with connections sealed and insulated per manufacturer specifications for energy efficiency and system performance.
Provided estimate for installation of integrated whole house dehumidifier as an addition to existing HVAC system with current integrated humidifier remaining in place. Inspected air handler unit and existing ductwork configuration to verify compatibility for new dehumidifier integration. Documented equipment dimensions and electrical requirements, confirmed system is properly configured for additional integrated accessories. Reviewed installation location options and discussed integration with existing humidity control components to ensure both humidification and dehumidification capabilities can operate independently as needed.
Completed routine HVAC maintenance service as part of scheduled tune-up campaign. Performed system diagnostics using digital testing equipment to verify operational parameters, inspected and assessed air filter condition in return air housing, and documented equipment status through photographic records. All components found operating within normal specifications with filter showing adequate cleanliness at time of inspection.
Conducted comprehensive replacement estimate for split HVAC system consisting of rooftop condensing unit and ground-level air handler. Accessed rooftop equipment via ladder to assess existing unit condition and specifications. Documented electrical service panel configuration and amperage capacity for system compatibility verification. Measured and photographed interior return air grille installation and existing air handler location to determine proper equipment sizing and clearance requirements. Evaluated ductwork connections and insulation condition on existing air handler assembly. Provided customer with equipment replacement options and specifications for complete system upgrade.
