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 17, 2026.
Job Locations and Reviews
Replaced failed compressor on aging HVAC system to restore cooling operation. Installed new compressor unit from shop inventory, reconnected refrigerant lines with proper fittings, and verified all electrical connections were secure. System tested and confirmed operational with proper cooling performance restored.
Responded to no-cool condition on upstairs system at property with two HVAC units. Diagnosed failed capacitor on outdoor condensing unit, which was preventing compressor operation and eliminating cooling capacity. Replaced defective capacitor with new unit, restoring proper system function. Additionally, replaced heavily soiled air filter with new filter to ensure adequate airflow and system efficiency.
Responded to no-cool call on 10+ year old system located in basement. Upon arrival, thermostat set to 70°F with ambient temperature reading 80°F. Customer reported significantly reduced airflow to bedroom and dining room, with minimal to no air delivery, while other areas of home maintained adequate airflow. No tripped breakers reported, and no ice buildup observed on evaporator coil or furnace area. Performed system inspection and diagnosed failed blower motor belt. Belt showed significant wear and deterioration consistent with age and use. Blower motor unable to operate effectively, resulting in insufficient air circulation throughout duct system and complete loss of cooling capacity. Photographed existing belt showing model number 15J480 for replacement part ordering. Part ordered for follow-up appointment to replace blower belt and restore system operation. Estimated repair time 30 minutes upon part arrival. Coordinated with supervisor for installation walkthrough. System remains
Conducted comprehensive HVAC replacement estimate at residential property. Evaluated existing outdoor air conditioning unit with ribbed metal exterior and protective cover, noting equipment condition and placement adjacent to building exterior. Assessed electrical infrastructure including main breaker panel with handwritten circuit directory identifying HVAC circuits, evaluated electrical connections and capacity for potential system replacement, and documented current system configuration to provide homeowner with equipment upgrade options and installation requirements.
Responded to service call for 7-month-old system requiring repeated hard resets to operate. Performed comprehensive diagnostic testing using refrigerant manifold gauge, confirming R410a system pressures at 246.5 psig suction and 312.0 psig discharge with superheat reading of 12.6°F and subcooling of 7.2°F. Measured supply air temperature at 63.5°F using digital thermometer. System operating parameters indicate proper refrigerant charge and airflow, suggesting intermittent electrical or control board issue causing lockout condition that requires manual reset to restore operation.
Responded to a no-cooling call on a 5-year-old system with a Nest thermostat that had lost internet connectivity and was allowing indoor temperature to reach 80°F before activating. Diagnosed thermostat communication failure, reconnected the Nest to Wi-Fi network, reconfigured temperature differential settings, and verified proper system operation with correct cycling parameters restored.
Responded to service call for non-operational air conditioning system affecting entire residence. Upon arrival, evaluated 26-year-old outdoor condensing unit positioned on grade adjacent to building foundation with electrical disconnect mounted on exterior brick wall. Conducted comprehensive system assessment and determined unit had reached end of serviceable life at 26 years of age, well beyond typical equipment lifespan. Documented existing installation configuration including electrical connections, refrigerant line routing, and equipment placement. Presented replacement options and provided detailed estimate for complete HVAC system replacement with energy-efficient equipment upgrade to restore cooling capacity to residence.
Responded to no-cool complaint on 10-month-old system experiencing inadequate cooling with indoor temperature reaching 82°F despite thermostat set to 70-75°F. Confirmed airflow present at registers with no ice buildup on evaporator coil. Inspected and tested electronic control module and circuit board assembly, verifying proper operation of all components including integrated circuits, capacitors, and wiring connections. System found operating within normal parameters; addressed cooling capacity concerns and provided recommendations for optimal performance during extreme heat conditions.
Responded to no cooling complaint on 9-month-old installation with indoor temperature at 80°F. Upon arrival, performed diagnostic assessment and measured supply air temperature at 56.1°F, confirming system was operating and producing adequate cooling. Verified proper system operation, reviewed thermostat settings with homeowner, and provided guidance on system expectations and optimal temperature management.
# Plumbing Repair Completion Completed installation of PEX water supply line system in utility area with proper securing and shut-off valve integration. Replaced deteriorated plumbing components in basement mechanical space, addressing previous moisture damage and upgrading drainage system with new PVC piping and couplings. All water lines properly fastened to wall framing with metal clamps, electrical wiring routed safely, and system tested for proper operation prior to wall closure.
Responded to callback for inadequate cooling and ice buildup on two-year-old system. Previous service identified insufficient return airflow (600 CFM actual vs. 1200-1400 CFM required for 3-ton unit) and added utility room return with round duct, box, and grille to meet CFM requirements. Follow-up visit completed finishing work around spray foam insulation with tape as final remediation. Verified filter condition, confirmed system operating within manufacturer specifications with proper temperature split and refrigerant charge, and system now cooling effectively with adequate airflow.
Responded to no-cooling complaint at commercial retail facility with three rooftop HVAC units, one of which was inoperative in the customer shopping area. Accessed rooftop equipment using extension ladder with two-technician safety protocol due to building height and access requirements. Performed diagnostic evaluation on non-functioning rooftop unit serving retail space, identifying system age at 10+ years. Documented ceiling-mounted supply diffuser and return grille locations within affected zone showing signs of inadequate air circulation. Provided repair versus replacement options assessment given unit age and building lease timeframe, with photographic documentation of equipment condition and site access requirements for future reference.
Completed scheduled HVAC system tune-up and maintenance as part of planned service campaign. Performed comprehensive system diagnostics using professional-grade testing equipment including UEi DL489 True RMS meter and Klein Tools temperature measurement device to verify electrical parameters and operational temperatures. All readings documented photographically, with system operating within normal specifications at 5.1 degrees temperature differential, confirming proper refrigerant charge and airflow performance.
Evaluated existing Honeywell Home digital thermostat and determined replacement with Wi-Fi enabled unit is necessary. Documented current thermostat model and configuration, photographed installation for reference, and ordered replacement Wi-Fi thermostat for upgrade. System remains operational with existing thermostat until replacement unit arrives; estimated installation time of 45 minutes upon part delivery.
Responded to no cooling complaint on 1-year-old system in main building. Upon arrival, confirmed airflow present at supply registers but no cooling output. Inspected electrical panel and verified proper power supply to AC unit #2 circuit breaker. Performed system diagnostics to identify cause of cooling failure and completed necessary repairs to restore proper operation. System tested and verified cooling functionality upon completion.
Completed follow-up site visit to assess and document ductwork installation in finished basement area. Verified metallic ductwork with reflective silver insulation is properly secured and routed across exposed black ceiling, with all joints fastened and sealed. System confirmed operational with adequate airflow distribution throughout living space.
Completed scheduled HVAC maintenance tune-up on residential system. Performed comprehensive electrical diagnostics using digital clamp meter to verify proper amperage draw and system performance. All electrical connections inspected, measurements recorded within normal operating parameters, and unit confirmed to be functioning efficiently.
Completed routine AC tune-up and maintenance inspection per scheduled campaign. Performed system diagnostics using digital multimeter to verify electrical parameters and measured supply air temperature at 19.3 degrees, confirming proper cooling performance. Inspected air filtration system and documented filter condition during service visit.
Completed Premium Plus service on outdoor hose bib installation featuring brass coupling with protective blue accent rings and green wheel-style valve handle mounted to exterior brick wall. Documented installation with photographs showing proper mounting height, secure wall penetration, and verified operational functionality of the valve control mechanism.
Completed annual Platinum Level maintenance on 4-year-old HVAC system located in basement. Inspected heat exchanger coils, which showed clean condition with minimal dust accumulation on fins and proper structural integrity of mounting framework. Replaced 20x25x5 air filter that displayed moderate dirt loading with discoloration on pleated media. Identified need for additional 16x25x4 filter for future service. System operating properly with all components functioning within normal parameters. This was the second maintenance visit for this annual service agreement, and membership is due for renewal.
