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 in July 2026.
The most recent job was on July 7, 2026.
Job Locations and Reviews
Conducted comprehensive assessment of existing HVAC system in basement installation for equipment replacement estimate. Customer reported current system operational but seeking replacement options. Evaluated gray metal furnace unit with associated ductwork, PVC condensate drainage system, and electrical disconnect box. Documented existing configuration including galvanized steel ductwork with horizontal ceiling runs, vertical air handler placement, and mechanical room layout adjacent to exposed brick wall. Photographed equipment specifications, manufacturer labels, and current installation conditions to provide accurate replacement recommendations and ensure proper sizing for new system installation.
Responded to cooling complaint on 9-year-old AC system not maintaining adequate temperature. Performed diagnostic evaluation of outdoor unit using clamp meter to measure electrical parameters and assess system performance. System blowing cool air but insufficient to maintain comfortable indoor temperatures below high 70s.
Responded to no cooling complaint on 13-year-old Bryant system. Diagnosed failed contactor preventing compressor operation. Replaced defective contactor with OEM equivalent part, restoring proper compressor engagement and system cooling functionality. Verified proper amperage draw, refrigerant pressures within manufacturer specifications, and confirmed unit cycling correctly under load.
Responded to service call for cooling system freezing up. Upon arrival, performed diagnostic evaluation of the air conditioning system. Inspected supply registers and airflow throughout the residence to assess system performance. Documented current conditions of the HVAC system with photographic evidence showing interior vent locations and airflow points. System evaluated for proper operation and potential causes of freeze-up condition addressed.
Conducted comprehensive HVAC replacement estimate for non-operational residential heating and cooling system. Assessed existing attic-mounted air handler unit showing significant condensation issues on metallic blower assembly and ductwork, documented current 16x25x1 filtration system, and evaluated overall equipment condition and accessibility. Provided homeowner with complete replacement options and system specifications during consultation.
Responded to no cooling complaint on 7-year-old residential HVAC system with indoor temperature at 79°F and thermostat set to 70°F. Upon arrival, confirmed system was not operational with no airflow from vents and no tripped breakers. Performed diagnostic testing using refrigerant manifold and micron gauge at outdoor condenser unit, measuring system pressures and temperatures to identify failure point. Inspection revealed failed dual-run capacitor in condenser unit showing significant oxidation, corrosion, and deterioration. Replaced defective Genteq capacitor with proper rated replacement. Verified all electrical connections, tested system operation, and confirmed proper cooling function restored with adequate airflow and temperature differential.
Completed full installation of an A.O. Smith ProLine commercial-grade water heater in utility room. Connected all supply and discharge lines using copper piping and PEX tubing with proper fittings, installed braided stainless steel flexible connectors, and ensured all safety valves and controls were properly mounted and operational per manufacturer specifications.
Completed duct repair and furnace cleaning per customer request. Customer opted not to proceed with previously sold dehumidifier installation at this time. Verified thermostat operation and system functionality upon completion of work.
Conducted follow-up site visit to document and assess previously incomplete HVAC installation work. Performed visual inspection and captured photographic documentation of the installation area for review and completion planning.
Responded to no cooling complaint and discovered frozen A-coil during maintenance inspection. Utilized digital manifold gauges to assess system pressures and temperatures, revealing abnormal readings indicative of restricted airflow or low refrigerant charge. Documented equipment conditions with photos for service records and further diagnostic evaluation.
# HVAC Complete System Installation Successfully completed full residential HVAC system installation including outdoor condensing unit and indoor air handler with associated ductwork and drainage systems. The outdoor unit was positioned on a concrete pad adjacent to the home's foundation with proper electrical conduit routing along the exterior wall. Interior installation in the basement mechanical room included mounting the air handler unit, connecting flexible metallic ductwork to existing rectangular trunk lines, and installing PVC condensate drain lines with appropriate shut-off valves. All equipment was properly secured, labeled per code requirements, and tested for operational functionality upon completion.
Completed initial plumbing maintenance visit and inspection of basement drainage system. Documented existing PVC drain lines, floor drain condition, and overall plumbing infrastructure for new membership enrollment.
Completed annual Platinum Level maintenance on 4-year-old HVAC system during second visit. Performed comprehensive inspection of air handler components, heat exchanger coil, and refrigerant lines. Replaced 24x24x1 air filter, verified system temperatures with digital instrumentation recording 53°F supply air temperature, and inspected insulated refrigerant piping for proper operation. All equipment components found in normal operating condition with routine dust accumulation. System performance verified and customer agreement renewed.
Responded to no cooling complaint on 7-year-old residential HVAC system. Upon arrival, confirmed adequate airflow from supply vents with no ice buildup present at indoor unit. System was actively running but delivering warm air to conditioned space. Performed visual inspection of air handler and associated refrigerant lines in utility closet. Investigated reported fluid leak concern around equipment area. Examined copper refrigerant lines, insulated suction line, and air handler cabinet for signs of refrigerant oil migration or other fluid discharge. Documented system installation configuration including ductwork connections and electrical components for diagnostic reference.
# HVAC Estimate - Cooling System Replacement Conducted site assessment of commercial print production facility experiencing inadequate cooling capacity from existing 15-ton air conditioning unit during equipment operation. Evaluated current system performance, documented facility layout including multiple large-format printing machines and EFI-branded equipment generating substantial heat load, and photographed existing thermostat wiring configuration showing multi-stage control setup. Provided comprehensive estimate for upgraded cooling system to address insufficient capacity in remodeled production space and maintain optimal operating temperatures during peak machine usage.
Responded to no cooling complaint on 6-year-old residential HVAC system blowing warm air with adequate airflow and no ice buildup present. Upon inspection of outdoor condensing unit, diagnosed failed dual run capacitor preventing compressor operation. Replaced defective capacitor with manufacturer-specified unit, verified proper microfarad ratings, and secured all electrical connections. Tested system operation, confirmed compressor engagement, proper amp draw, and adequate temperature split across evaporator coil. System restored to normal cooling operation.
Responded to a no cooling complaint on a 4-year-old system where the back bedroom had no airflow and the rest of the home was warmer than normal. Upon inspection, discovered severe condensation and frost accumulation on supply ductwork in the attic space, indicating inadequate insulation on the duct and possible airflow restriction. The heavy moisture buildup on the metal duct surface was causing reduced air delivery to the affected bedroom zone. Documented the compromised duct insulation showing water staining and compression, as well as the extent of condensation on the uninsulated duct sections. Advised that the ductwork requires proper insulation wrap to prevent condensation issues and restore adequate airflow to all zones.
Completed comprehensive HVAC replacement estimate for residential forced-air heating system located in basement utility area. Existing furnace unit evaluated and documented, showing signs of moisture accumulation in drain pan and water staining on concrete floor surrounding equipment base. Assessment included inspection of flexible ductwork distribution system, condensate drainage components with PVC piping, and overall equipment condition with visible wear patterns consistent with aging system operation.
Responded to callback for water leak causing drywall damage and inadequate cooling following recent installation. Upon arrival, performed comprehensive system diagnostics using refrigerant manifold gauges to verify pressures and temperatures across all zones. Measured system performance with indoor temperature at 78°F, identified and resolved water leak issue, and confirmed proper refrigerant charge and airflow to restore normal cooling operation.
Completed comprehensive load calculation for HVAC system replacement, determining cooling load of 52,949 BTUh and heating load of 83,196 BTUh. Analysis revealed required cooling capacity of 4.9 tons at 0.75 SHR with 1714 CFM airflow needed. Evaluated existing Arcoaire furnace installation in basement mechanical room and documented current equipment configuration to provide accurate replacement estimate for system upgrade.
