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 10, 2026.
Job Locations and Reviews
Provided estimate for replacement of 25-year-old GE Zone Line unit with new 15K BTU heat pump system. Assessed existing installation location in residential living space and documented current unit configuration. Presented equipment options and specifications for packaged terminal heat pump replacement to restore efficient heating and cooling capacity.
Completed installation of mini split system. Performed system commissioning including refrigerant pressure verification, vacuum testing, and temperature differential measurements. System operating within manufacturer specifications with proper airflow and cooling performance confirmed.
Responded to no cooling complaint on one-year-old system blowing warm air with thermostat set to 68°F but reading 74°F. Performed diagnostic evaluation of HVAC system, confirmed adequate airflow through vents, verified no tripped breakers or evaporator coil freeze-up present. Documented system conditions and captured photos of installation area for service records.
Responded to callback for ongoing drain pan leak on Amana system. Upon arrival, confirmed water accumulation in drain pan with active dripping to floor despite previous remediation attempts. Documented standing water in pan with visible debris and staining indicating long-term moisture issues. System shows signs of extended lack of maintenance contributing to drainage failure. Replacement drain pan previously ordered; awaiting part arrival to complete permanent repair.
Responded to commercial single-story facility for no cooling complaint on 10+ year old rooftop unit. Upon arrival, accessed mechanical room and rooftop equipment to diagnose system failure. Found air handler in mechanical room non-operational with no airflow to conditioned space. Filter had not been serviced in 5-6 years, resulting in severely restricted airflow and system shutdown. Inspected rooftop condensing unit and associated ductwork, noting weather exposure and age-related wear on exterior components. Performed diagnostic testing on electrical components, refrigerant system, and airflow pathways. Documented equipment condition with photographic evidence showing mechanical room layout with ceiling-mounted ductwork and rooftop unit configuration. Secondary split system in office area confirmed operational, isolating issue to primary rooftop package unit serving main space.
Responded to no cool call for 21-year-old PTAC unit in Florida room. Upon arrival, found unit operational but cycling off prematurely and failing to maintain adequate cooling capacity. Performed diagnostic evaluation of compressor operation, refrigerant circuit, and thermostat controls showing 71°F setpoint with cooling mode engaged. Due to advanced age of unit beyond expected service life and intermittent cooling performance indicating likely compressor failure or refrigerant loss, recommended system replacement over repair. Discussed replacement options with homeowner who expressed interest in new unit installation.
Conducted on-site evaluation of existing water heater in basement utility area to provide replacement estimate. Assessed current tank-type water heater configuration, surrounding plumbing connections, available clearances, and venting requirements. Documented existing equipment specifications and installation conditions through photography. Discussed replacement options with customer including conventional tank water heater versus tankless water heater systems, reviewing advantages and considerations of each option based on household hot water demands and existing infrastructure. Provided comprehensive estimate for water heater replacement with equipment and installation specifications.
Conducted on-site evaluation for air conditioning condenser replacement at residential property. Assessed existing outdoor condenser unit positioned on concrete pad along exterior brick wall foundation, with electrical disconnect and conduit present. Inspected interior HVAC components including vertical and horizontal ductwork with reflective insulation in basement mechanical room. Documented current system configuration through photographs of outdoor condenser unit and indoor air distribution system. Provided estimate for new condenser installation to homeowner who was uncertain of existing unit's age and service history.
Completed water heater flush service in basement utility area housing both HVAC and plumbing equipment. Performed standard maintenance flush procedure on gray cylindrical water heater unit to remove sediment buildup and ensure optimal performance. Documented existing conditions including HVAC system components, Trane heating/cooling unit, associated ductwork, copper piping with brass fittings, and insulated pipe connections throughout the mechanical room.
Completed HVAC estimate for full system replacement on a non-functional 20-year-old cooling system that was experiencing repeated coil freeze-up issues despite refrigerant recharge attempts. Customer declined repair options and confirmed interest in complete system replacement, currently utilizing temporary window units due to primary system failure. Documented existing equipment location and gas meter proximity for replacement planning purposes.
Conducted comprehensive HVAC replacement estimate for 18-year-old Carrier system including basement furnace installation and outdoor cylindrical condenser unit. Assessed condition of existing equipment showing signs of age and weathering, documented current system configuration with metallic ductwork, yellow gas line connections, and refrigerant lines running to exterior unit mounted on concrete pad with yellow block supports. Provided complete evaluation and replacement recommendations for aging heating and cooling system.
Responded to service call for reduced airflow on 3-year-old AC system. Performed diagnostic evaluation using manifold gauges to check refrigerant pressures and system performance on R22 unit. System found to be cooling adequately with no signs of refrigerant leak or coil icing. Inspected condenser unit including fan blade and heat exchanger fins, confirming proper operation and airflow at outdoor unit.
Responded to no-cool complaint on 3-year-old system experiencing short cycling, loud operational noise, and inability to maintain temperature below 79°F. Upon inspection, found severely clogged air filters with significant dust and debris accumulation restricting airflow. Replaced dirty filters with new units to restore proper airflow. Performed refrigerant pressure diagnostics using manifold gauges, recording suction pressure at 137.7 PSI and discharge pressure at 264.8 PSI. System operating parameters returned to normal range after filter replacement, eliminating short cycling and excessive noise. Unit now cooling effectively and maintaining setpoint temperature.
Conducted comprehensive replacement estimate for non-functional HVAC system at property where customer previously purchased equipment from our company. Evaluated existing Carrier air handler unit installed in utility closet, documenting current configuration including PVC condensate piping, flexible ductwork connections, and electrical wiring. Presented replacement options to homeowner during consultation.
Returned to address ongoing no-cooling condition on R-410A system following previous day's service visit. Upon arrival, verified system still not operating properly and performed comprehensive diagnostics using digital manifold gauge and electrical testing equipment. Measured operating pressures at 229.1 psig high side and 224.6 psig low side, with superheat reading of 100°F and subcooling at -0.3°F, indicating critical refrigerant charge issue. Conducted electrical testing of system components to rule out compressor or control failures. Documented system conditions with detailed photographs of diagnostic readings and equipment setup. No additional charges applied for callback service per company policy.
Performed routine water heater flush on State Select unit to remove sediment buildup and maintain optimal performance. Inspected all plumbing connections, copper supply lines, and shut-off valves to ensure proper operation and verify system integrity. Documented existing installation with photographs showing water heater, associated ductwork, and surrounding mechanical systems in basement utility area.
Responded to follow-up service call for water leak reported after 5-6 hours of system operation. Upon arrival, inspected HVAC furnace unit and surrounding components including ductwork, condensate drainage system, and associated piping. Conducted thorough visual examination of the unit's internal components, blower assembly, control board, and all visible connections. Photographed the installation to document the current condition of the system, including the furnace cabinet with access panel removed, copper and PVC piping, and ductwork connections with foam insulation. Identified potential leak sources in the condensate drainage system and inspected all pipe connections, joints, and drain lines for proper installation and secure fittings. Verified the integrity of the condensate pump operation and drainage pathway to ensure proper water evacuation from the system during cooling operation.
Conducted comprehensive site assessment for complete HVAC system replacement involving both heating and cooling equipment. Evaluated existing electrical infrastructure and condensate drainage system, documenting current panel configuration with circuit breaker arrangement and existing drain pan condition showing mineral deposits and water staining, indicating need for complete system removal and installation of new equipment with updated safety components including proper float switch integration.
Responded to water leak complaint in utility closet housing 4-year-old Goodman HVAC system and AO Smith water heater. Conducted thorough inspection of attic space and identified improperly installed flexible ductwork routing through ceiling joists with inadequate sealing at roof penetration points. Black flexible ducts showed signs of moisture intrusion and improper slope allowing condensation accumulation. Traced water entry point to compromised vent flashing connection at roof line where HVAC exhaust penetrates roofing structure. Confirmed roofer's assessment that ductwork installation did not follow proper building codes for attic ventilation systems. Water damage evident on utility closet flooring required placement of air movers to prevent further deterioration. Documented attic conditions showing loose-fill fiberglass insulation, exposed ceiling joists, and three runs of flexible ductwork with visible wear and dust accumulation. Provided recommendations for proper duct reconfigur
Completed full HVAC system installation including Lennox furnace with integrated controls and A.O. Smith ProLine 30-gallon water heater. All equipment properly installed, connected, and tested with control boards wired and operational, flexible ductwork secured, and gas/water lines connected per manufacturer specifications.
