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 15, 2026.
Job Locations and Reviews
Conducted HVAC system diagnostics and repair preparation at residential property. Part staged and ready for installation with vacuum pump and recovery equipment positioned on-site per service protocol. Unit accessible and prepared for scheduled repair completion.
Responded to callback for recurring AC disconnect switch tripping on a 2-year-old system. Upon arrival, unit was operational as occupant had reset the disconnect. Performed comprehensive electrical diagnostics using digital multimeter to identify root cause of nuisance tripping. Tested voltage and amperage at disconnect switch and condenser unit, measuring 420V and verifying proper electrical parameters. Inspected compressor windings, contactor operation, and capacitor performance. All electrical readings within manufacturer specifications with no signs of short circuit, ground fault, or excessive amp draw that would cause disconnect to trip. Examined outdoor unit components including condenser fan motor and compressor for mechanical issues. Found no defects in equipment operation or wiring connections. System cooling properly with normal temperature differential. Documented findings with diagnostic photos showing test equipment readings and unit condition for warranty records.
# Water Heater Flush and HVAC Installation Completed standard maintenance water heater flush procedure to remove sediment buildup and ensure optimal heating efficiency and tank longevity. Drained tank completely, flushed system with fresh water until discharge ran clear, and refilled unit to proper operating levels. Verified temperature and pressure relief valve operation and confirmed all connections remained secure throughout the service. Additionally, installed wall-mounted packaged terminal air conditioner (PTAC) unit in interior space. Mounted climate control system on prepared wall surface above baseboard trim, ensuring proper alignment and secure attachment. Connected unit to existing electrical supply and verified operational functionality of both heating and cooling modes. Tested air discharge through horizontal louvers and confirmed even airflow distribution. Unit installation completed with decorative lower grille panel properly secured. Documented existing wall condition
Completed scheduled HVAC maintenance on air conditioning and furnace systems. Performed comprehensive AC tune-up including system diagnostics, electrical testing with multimeter showing proper voltage readings, and replaced air filter with new pleated media filter. Delivered requested condensate pump caps as specified.
Conducted comprehensive HVAC replacement estimate for existing Goodman system struggling to maintain adequate heating and cooling capacity. Evaluated current 2-ton Goodman furnace installation with A-coil configuration located in utility space, documenting existing ductwork layout, flexible metallic duct connections, and system accessibility. Assessed installation area conditions including wooden framing, available workspace clearances, and existing mechanical infrastructure to determine optimal replacement specifications. Photographed current equipment positioning, duct routing, and mechanical room configuration to develop accurate replacement proposal for new 2-ton Goodman system with A-coil assembly.
Completed follow-up site visit and documentation for rooftop HVAC system estimate. Photographed existing equipment conditions including heavily corroded piping, rusted metal fittings, and weathered PVC connections on commercial flat roof membrane. Documented rooftop unit placement, electrical disconnect box, support structures, and overall system accessibility for accurate proposal preparation.
Conducted comprehensive replacement estimate for flood-damaged furnace and electric tanked water heater currently located in cellar area. Assessed feasibility and requirements for relocating both units from exterior cellar into interior living space of home. Performed detailed site measurements and documentation of proposed installation locations, including evaluation of existing venting systems, clearance requirements, and accessibility for future service. Photographed current bathroom and adjacent hallway areas to document potential relocation sites and assessed structural considerations for equipment placement. Evaluated electrical service capacity, gas line routing if applicable, and water supply connections required for interior installation. Provided homeowner with replacement options and discussed configuration requirements for bringing flood-damaged equipment into conditioned space of residence.
Successfully replaced bathroom faucet assembly with new brushed nickel three-hole widespread fixture featuring high-arc spout and dual lever handles. Removed existing faucet, cleaned mounting surface, and installed new unit with proper sealing to white ceramic sink basin. Connected hot and cold water supply lines using braided stainless steel flexible hoses with secure compression fittings. Verified all connections under sink were leak-free and properly tightened. Tested water flow and temperature control on both handles, confirming proper operation and drainage through existing PVC trap assembly. All components functioning correctly upon completion.
Completed first planned duo maintenance visit for Gold Level member with two systems aged 1.5 and 20 years. Performed comprehensive inspection and testing on both units, including electrical diagnostics with multimeter readings showing voltage at 405V and current draw at 14.037A on primary system, and 2.33V with 0.1156A measurements on secondary system components. Verified capacitor operation, tested control board functionality, and inspected all electrical connections and wiring. Changed customer-furnished filters and documented system performance with photographic evidence for service records.
Conducted indoor air quality assessment for residential HVAC system in basement mechanical room. Evaluated existing furnace and ductwork configuration to determine optimal placement for air scrubber and UV light installation. Inspected current equipment setup, including furnace unit with PVC venting, air handler components, and thermostat system to ensure compatibility with requested IAQ upgrades. Documented equipment specifications and existing conditions to provide comprehensive estimate for air purification enhancement system installation.
Completed warranty follow-up service to address air return vent installation issues. Sealed and taped the top of the return air ductwork at the wall penetration point to prevent air leakage and improve system efficiency. Applied proper sealing methods to the metal ductwork connections where they interface with the interior wall structure, ensuring adequate air sealing at the return air grille location.
Performed USA Bronze tanked water heater maintenance service, which included a complete flush of the cylindrical gray residential water heater unit located in the basement utility area. Drained sediment buildup from the tank bottom, inspected all visible plumbing connections and fittings at the top of the unit, and verified proper operation of the temperature and pressure relief valve. All components were found to be functioning within normal parameters, and the unit was refilled and returned to service.
Completed full HVAC system installation including outdoor condenser unit placement on concrete pad. Unit was properly leveled and positioned per manufacturer specifications, with all components verified for correct installation and operational readiness.
Completed full HVAC system installation including new ductwork in attic space with properly secured metal supply ducts and insulation barriers. Installed new air handler unit with refrigerant lines and mechanical components, verified all connections and system operation upon completion.
Responded to service call for spigot installation and plumbing system evaluation. Inspected and verified proper installation of PEX water supply lines with brass fittings, including blue hot and cold water lines with appropriate shutoff valves and connections. Confirmed floor drain functionality and drainage system integrity in utility area, ensuring all plumbing components met code requirements and operated correctly.
Completed Platinum Level preventive maintenance on single-system HVAC unit as part of 3-month maintenance program first visit. Performed comprehensive system diagnostics and measurements using digital multimeter, recording electrical readings and temperature differentials to verify proper system operation and performance within manufacturer specifications.
Performed comprehensive HVAC replacement estimate for aging residential system. Assessed existing 3-ton air conditioning unit and furnace configuration at exterior access point. Conducted measurements and photographic documentation of current equipment installation, including clearances and access panel dimensions for replacement planning. Evaluated system capacity requirements and provided recommendations for complete HVAC system replacement including both cooling and heating equipment.
Responded to water leak call at basement location near 12-year-old HVAC system. Upon arrival, observed large water accumulation that had been present for approximately one week. Conducted thorough inspection of furnace area to identify source of moisture intrusion. Inspected condensate drain line, evaporator coil drain pan, and surrounding components for potential leak points. Replaced dirty, saturated air filter with new unit to restore proper airflow and system operation. Documented conditions with photographs for service records. No structural damage reported at time of service.
Responded to no-cooling complaint on 5-year-old system blowing warm air with thermostat set to 74°F but reading 79°F. Customer reported dampness near lineset with no ice buildup or tripped breakers. Upon inspection, utilized Fieldpiece SC260 clamp meter to diagnose electrical components and measure system amperage, which displayed 97.25 reading. Accessed outdoor condensing unit and inspected internal components including capacitor with multiple wire connections and CoreSense diagnostic module for Copeland compressor. Identified moisture concern at lineset location and verified proper electrical connections at capacitor terminals. Performed comprehensive system diagnostics to determine root cause of cooling loss and documented findings with photographic evidence of equipment condition and meter readings.
Performed comprehensive tanked water heater flush and maintenance service. Drained sediment buildup from tank bottom, flushed system with fresh water until discharge ran clear, and inspected all plumbing connections including braided supply lines and brass fittings for proper operation. Verified temperature and pressure relief valve functionality, checked anode rod condition, and ensured all components were secure and leak-free upon completion.
