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
Louisville, KY at a glance
A+ Derr Heating & Cooling has completed 20 jobs in Louisville, KY between July 2026 and August 2026.
The most recent job was on August 3, 2026.
Job Locations and Reviews
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.
Completed scheduled AC tune-up and preventative maintenance on residential air conditioning system. Performed comprehensive inspection of outdoor condensing unit, including electrical connections, capacitor condition, and control components. All wiring connections verified secure with proper color coding and terminations. Measured system temperatures and pressures, confirming unit operating within normal parameters. System tested and left in proper working condition.
Responded to no cooling complaint on 7-year-old upstairs HVAC system. Upon arrival, performed comprehensive electrical diagnostics on outdoor condensing unit using digital multimeter to test voltage and capacitance values. Testing revealed failed capacitor preventing compressor operation. Replaced defective dual-run capacitor and verified proper electrical readings across all terminals. Cycled system through complete cooling cycle, confirmed proper compressor amperage draw, and verified adequate airflow and temperature differential at supply registers. Unit restored to full cooling operation.
Completed monthly Platinum Level maintenance on single HVAC system. Performed electrical diagnostics using clamp meter to verify system amperage and operational parameters. Replaced 16x25x1 pleated air filter with new unit to maintain proper airflow and system efficiency per scheduled maintenance protocol.
Returned to property to deliver 16x25x4 air filter that was unavailable during original planned maintenance visit. Filter was placed at front entrance as requested by customer for self-installation.
Completed Platinum Level planned maintenance on a 1-year-old single HVAC system. Performed comprehensive system inspection, replaced 16x25x4 air filter, inspected blower assembly and wheel operation, checked condensate drain line for proper flow and blockages, and documented system condition with photos. All components operating within normal parameters upon completion.
Responded to callback for commercial rooftop unit not cooling, with space temperature at 78°F despite thermostat set to 69-70°F. Inspected 9-year-old system and electrical control panel, documenting wire management and low-voltage control circuits. Determined specialized equipment required for proper diagnosis and repair of commercial unit not available on current service vehicle. Scheduled follow-up appointment with appropriately equipped technician to complete troubleshooting and resolve recurring cooling issue.
Completed routine planned maintenance on residential HVAC system. Performed comprehensive tune-up inspection of outdoor condensing unit, including visual examination of internal components, wiring connections, and electrical systems. Verified proper voltage readings at condenser fan motor, measuring 232 volts AC with calibrated testing equipment. Inspected all electrical connections, wire routing, and securing methods for code compliance and safety. Examined capacitor mounting, refrigerant line connections, and overall unit condition. All components found operating within normal parameters with no deficiencies noted. System tested and left in proper working order.
Responded to callback for cooling system not maintaining temperature and blowing warm air with outdoor unit failing to operate. Upon arrival, verified thermostat displaying 79°F with system set to off mode and indoor temperature 6 degrees above setpoint. Inspected outdoor unit and found contactor failed to energize compressor. Tested electrical connections, capacitor, and control board functionality. Identified faulty contactor preventing outdoor unit operation. Replaced defective contactor, restored power, and cycled system through complete operational test. Verified compressor and condenser fan motor engaging properly, confirmed proper amperage draw on all components, and ensured system cooling effectively with appropriate temperature differential across evaporator coil.
Responded to no cooling call on 2-year-old system with complete loss of operation. Performed diagnostic testing at outdoor condensing unit and identified failed capacitor preventing compressor and condenser fan motor from starting. Replaced defective capacitor with proper rated replacement, verified electrical readings within manufacturer specifications at 23.1 amps, and confirmed system returned to normal cooling operation with proper airflow at supply registers.
Completed monthly Platinum Level planned maintenance on a 2-year-old HVAC system. Performed comprehensive system inspection, recorded temperature readings showing 57.5°F and 56.88°F at measured points, and replaced monthly filters as part of recurring service agreement. All components operating within normal parameters.
Installed a 50-gallon AO Smith ProLine electric residential water heater in utility closet. Connected hot and cold water supply lines with proper color-coded flexible connectors and brass fittings, ensuring all plumbing connections were secure and leak-free per manufacturer specifications.
Responded to a free second opinion request for an air conditioning system that has not been keeping up with cooling demands. Accessed the crawl space to inspect the HVAC system installation and measured supply air temperature and airflow at floor registers using diagnostic equipment. Found the property had only received previous boiler service with no prior AC maintenance history, requiring a comprehensive system evaluation to determine why the cooling system was underperforming.
Conducted site assessment for furnace relocation project in unfinished basement area. Evaluated existing Goodman furnace unit and current ductwork configuration to provide estimate for relocating equipment and installing new duct system. Documented present conditions including exposed framing, concrete flooring, existing electrical routing, and accumulated debris in workspace. Assessed attic/crawl space areas with existing flexible ductwork and insulation to determine scope of modifications required for relocated furnace and new duct installation.
Conducted on-site evaluation for HVAC replacement in a multi-room facility with existing wall-mounted units showing signs of wall staining and age-related deterioration. Measured and assessed two separate room locations (rooms 202 and 203) to provide equipment replacement options, specifically evaluating feasibility for either PTAC unit replacement or multi-head mini-split system installation. Documented existing unit dimensions, electrical connections, and spatial constraints to develop comprehensive replacement proposal for the homeowner.
Completed professional installation of A.O. Smith residential water heater in basement utility area, including all necessary plumbing connections with copper piping and brass fittings integrated into existing overhead infrastructure. Unit was properly positioned, secured, vented through galvanized ductwork, and tested for optimal performance with SENSE monitoring system staged for installation.
Completed Platinum Level planned maintenance on a 7-month-old single-system HVAC unit. Performed comprehensive system diagnostics including electrical current measurements on the outdoor condenser unit using a clamp meter to verify proper amperage draw and component operation. Measured supply air temperature at 67.5°F to confirm adequate cooling performance and system efficiency. Inspected all electrical connections, refrigerant lines, and ductwork for proper installation and operation. System operating within manufacturer specifications with no deficiencies noted.
Conducted comprehensive HVAC system evaluation for complete replacement estimate on aging residential installation. Assessed exterior condensing unit showing significant weathering and rust deterioration on protective grille, documented electrical service connections and meter configuration, and evaluated existing thermostat wiring configuration on UWP12 control module with multi-stage capability. Photographed all equipment conditions and provided detailed replacement recommendations for new energy-efficient system.
Completed installation of new air conditioning system including evaporator coil and ductwork modifications in residential attic space. Installed reflective insulated ductwork with proper routing and connections, integrated new metallic supply ducts with appropriate elbow fittings for optimal airflow distribution, and ensured all components were properly secured and sealed. System was tested for proper operation and airflow efficiency upon completion.
# HVAC Maintenance Service Completed Performed comprehensive preventive maintenance on a two-year-old residential air conditioning system per customer's scheduled tune-up request. System was operating normally with no reported issues at time of service. Conducted complete electrical diagnostics using digital multimeter to verify proper voltage and amperage across system components. All electrical readings confirmed within manufacturer specifications. Measured supply air temperature at 50.9°F, indicating adequate cooling performance and proper refrigerant charge levels. Completed standard maintenance protocol including inspection of all major components, verification of operational parameters, and system performance assessment. All measurements and observations documented photographically for service records. System left in proper working order with all safety controls functioning as designed.
