Life at home runs on comfort, until something breaks. One minute everything’s working, and the next, your furnace is making strange noises, your outlets won’t cooperate, or your water heater decides to quit right before a busy Monday morning. At A+ Derr Heating, Cooling, Plumbing, & Electrical, we’re not just here for emergencies, we’re here to make things feel right again. Proudly serving Southern IN, we offer HVAC, plumbing, and electrical services with a personal, down-to-earth approach. Whether it’s a small fix or a major upgrade, call A+ Derr at 833-232-4328 or contact us online to get started,
Reliable Plumbing Solutions for Princeton Homes
Water is essential—but plumbing issues can be a serious headache. From subtle leaks to sudden backups, we take care of it all so you can get back to normal.
- Sewer Line & Drain Cleaning: If your sinks or tubs are draining slowly—or not at all—we clear the mess and inspect your lines to prevent future surprises.
- Leak Detection You Can Trust: That mystery puddle? We’ll trace it, fix it, and help stop hidden leaks from driving up your water bill or damaging your home.
- Hot Water Issues Solved: No more cold showers. We repair and replace both traditional and tankless water heaters, ensuring you’ve got reliable hot water when you need it.
- Plumbing Upgrades: Whether you’re swapping out a leaky faucet or renovating the whole bathroom, our team installs everything from toilets to tubs.
- Sump Pump Installation: Protect your basement from heavy rains and rising water with a dependable sump pump, installed and maintained by our pros.
24/7 Emergency Service
(833) 232-4328
Princeton Heating Services You Can Trust
If you’ve lived through a Princeton winter, you know how fast a sunny day can turn into a freezing night. That’s why your heating system needs to be dependable—and why we’re here when it’s not. Whether your furnace starts making weird noises, your boiler won’t kick in, or you’re just not getting the warmth you expect, our heating team shows up ready to get your comfort back on track—without the stress.
- Furnace Repair & Installation: If your furnace is rattling, blowing lukewarm air, or refusing to start, we’ll track down the problem and fix it—or set you up with a new, high-efficiency unit that heats reliably and saves on bills.
- Boiler Repairs & Radiant Heat Help: Radiant heat systems are efficient and cozy, but they need the right care. Whether it’s an old boiler or a finicky pump, we’ll keep your system running quietly and consistently.
- Heat Pump Services: Looking for year-round comfort? Heat pumps offer both heating and cooling in one unit, and our team installs and services them to run at peak efficiency in all seasons.
- Geothermal Heating Systems: Want to go green and save big over time? Our geothermal solutions tap into stable ground temps to heat your home sustainably—great for long-term value and the environment.
- 24/7 Emergency Heating Repair: Heating issues don’t wait until business hours. That’s why we offer round-the-clock emergency support—so you’re never left in the cold.
Stay Cool with AC Services in Princeton
When your air conditioner struggles to keep up, it doesn’t just affect your comfort—it makes the whole house feel off. Cooking becomes unbearable, sleep is impossible, and even sitting still is sticky business. That’s when you call A+ Derr. We show up ready to tackle the issue head-on, whether it’s a minor fix or a full system replacement, so you can get back to cool, quiet evenings and comfortable mornings.
AC Repair
Whether it’s a refrigerant issue, a faulty motor, or just not cooling like it used to, we diagnose and fix air conditioning problems fast—so you don’t have to sweat it out.
AC Installation & Replacement
If your current system struggles every summer or is costing you a fortune on energy, we’ll help you choose and install a more efficient model that fits your space and comfort needs.
Ductless Mini-Split Systems
Don’t have ducts? No problem. Ductless mini-splits offer zoned comfort with sleek, efficient design—perfect for converted attics, additions, and more.
Preventive AC Maintenance
Don’t wait until your system fails on a hot day. We offer seasonal maintenance that keeps your AC running longer, stronger, and more efficiently year after year.
24/7 Emergency Service
(833) 232-4328
Princeton Electrical Services That Power Your Day
Nearly everything in your home—from your fridge to your phone charger—runs on electricity, and when something goes wrong, it doesn’t just disrupt your day, it slows down your entire routine. Whether your lights are flickering, your panel’s overloaded, or you’re looking to bring your home into the 21st century with smart features or EV charging, we’ve got the expertise to make it all work safely and smoothly. Our job is to help you power your life with confidence.
- Electrical Panel Upgrades: If your panel trips every time you run the microwave and dryer at the same time, it’s probably time for an upgrade.
- Outlet & Switch Installations: Need USB ports or smart switches? We make it easy to modernize your outlets with clean, professional installs.
- EV Charger Installation: We install Level 2 chargers in Princeton so you can power up your electric vehicle quickly and conveniently from home.
- Whole-Home Surge Protection: Don’t wait until after the damage is done. We install whole-house protection to safeguard your devices and appliances.
- Service Upgrades: Still relying on an outdated electrical system? We upgrade service panels and wiring to handle today’s tech-savvy lifestyles—so your power keeps up with your pace.
- Equipment Repair: Got flickering lights, dead outlets, or a circuit that keeps tripping? Our team tracks down and repairs electrical issues before they become hazards.
- Light Commercial Services: Run a small business in Princeton? We provide commercial-grade electrical solutions that keep your shop, office, or workspace powered and compliant—without cutting corners.
- Backup Generator Systems: Stay safe and connected during power outages with a professionally installed standby generator.
- Lighting That Works for You: From under-cabinet kitchen lights to motion-sensor outdoor lighting, we’ll help you design and install the lighting you need.
Indoor Air Quality Solutions for Cleaner, Healthier Princeton Homes
Your HVAC might be heating and cooling your home, but what about the air itself? If it’s dusty, dry, or stuffy, we’ve got solutions that go beyond temperature.
- Whole-Home Air Purifiers: Trap allergens, pet dander, and airborne bacteria to create a fresher living space.
- Humidity Control: Keep air from feeling too dry in the winter or too sticky in the summer with the right balance of moisture.
- Duct Cleaning & Sealing: Clear out built-up debris and seal air leaks to improve airflow, reduce allergens, and boost energy efficiency.
- Filter Upgrades: A better filter means cleaner air and a longer-lasting HVAC system—we’ll help you pick the right one.
Get It Done Right—Call A+ Derr in Princeton Today
Whether it’s your first call or your fifteenth, we’re here when you need a hand. A+ Derr Heating, Cooling, Plumbing, & Electrical offers honest, hardworking service for plumbing, HVAC, and electrical repairs and upgrades in Princeton, IN. Call us at 833-232-4328 or contact us online for more information.
Recent Jobs and Reviews in Princeton, IN
Job Locations and Reviews
Luke O.
Completed annual planned maintenance on residential HVAC system consisting of Goodman outdoor condensing unit and Lennox furnace with air handler. Performed comprehensive system inspection, changed 16x25x5 air filter, checked all electrical connections and components, verified proper airflow and refrigerant levels, tested thermostat operation, and inspected condensate drainage system. All equipment operating within manufacturer specifications with no deficiencies noted at time of service.
Princeton, IN 47670
Craig U.
Responded to no cooling complaint on 5-year-old residential HVAC system with indoor temperature at 79°F. Upon inspection, discovered extensive ice buildup on evaporator coil, indicating restricted airflow or low refrigerant charge. Documented ice-covered coil assembly with substantial frost accumulation obscuring coil fins and internal components. Instructed homeowner to turn AC off and set fan to ON position to allow coil to defrost before further diagnostic work could be performed. System requires follow-up service after defrost cycle to diagnose underlying cause of freezing condition, which may include dirty air filter, blocked return air, low refrigerant charge, or failed blower motor components.
Princeton, IN 47670
Nick B.
Conducted comprehensive HVAC replacement estimate for residential property. Evaluated existing outdoor air conditioning condenser unit showing signs of age and weathering, with discoloration on exterior surfaces. Assessed indoor tankless Carrier water heater installation in utility closet with digital control panel and proper copper piping connections. Documented current system configuration including electrical connections, condensate drainage, and equipment placement. Provided detailed replacement options and discussed available financing programs and payment plan structures to accommodate budget requirements.
Princeton, IN 47670
Jeremiah H.
Completed second scheduled Gold Level maintenance visit on 5-year-old single-zone HVAC system. Performed comprehensive inspection of indoor furnace unit located in interior utility closet and outdoor condensing unit. Changed 20x25x1 air filter, verified proper airflow through ductwork and flexible connections, and confirmed all mechanical components operating within manufacturer specifications. Documented equipment condition with photographic records showing both interior and exterior units in satisfactory working order.
Princeton, IN 47670
Jeremiah H.
Completed Platinum Level maintenance on single-system HVAC unit during first-year service visit. Replaced 16x25x5 air filter at indoor air handler location and performed comprehensive inspection of outdoor condenser unit, verifying operational status and documenting equipment condition with photos.
Princeton, IN 47670
Brock B.
Completed comprehensive planned maintenance on gas furnace heating system. Performed full system inspection including burner assembly, ignition components, gas valve operation, and all safety controls. Verified proper operation of pressure switches, flame sensor, and control board connections. Inspected all electrical connections and control wiring for secure terminations. Checked burner tray assembly and confirmed proper mounting and alignment. System tested and verified operational with all safety devices functioning within manufacturer specifications.
Princeton, IN 47670
Brock B.
# HVAC Maintenance Completed Performed comprehensive Platinum Level maintenance service on a single-system HVAC installation consisting of an indoor furnace unit located in basement mechanical room and outdoor condensing unit. Conducted thorough inspection of vertical furnace cabinet, verified proper operation of all components, and examined flexible ductwork connections and PVC condensate drainage piping. Inspected outdoor unit including condenser coil, refrigerant lines, and weathered flexible connections, noting accumulated dirt and grime on exterior components. Replaced air filter per maintenance protocol, checked all electrical connections, and verified system operational parameters meet manufacturer specifications. Both indoor and outdoor units are functioning properly following completion of scheduled preventive maintenance procedures.
Princeton, IN 47670
Steven W.
Conducted site assessment of crawl space to provide estimate for installation of two dedicated 120V sump pump circuits. Evaluated existing electrical infrastructure, foundation access points, and routing requirements through confined underfloor area with exposed floor joists and concrete block foundation walls. Documented crawl space conditions including limited clearance, soil floor surface, and structural considerations for proper conduit installation and circuit protection to support dual sump pump system installation.
Princeton, IN 47670
Steven W.
Reconnected the service ground at the main electrical panel to restore proper grounding for the electrical system. Verified all grounding connections were secure and tested the system to ensure proper operation and safety compliance.
Princeton, IN 47670
Steven W.
Responded to service call for partial power loss affecting portions of the residence. Upon arrival, performed comprehensive troubleshooting of the main electrical distribution panel and associated branch circuits. Inspected panel box, circuit breakers, and wire connections for signs of failure, loose connections, or damaged components. Traced affected circuits through basement and attic spaces to identify point of failure. Verified proper voltage levels, tested breaker functionality, and examined wire routing through floor joists and structural spaces. Identified and resolved issue causing partial power condition, restoring full electrical service to all affected areas of the home.
Princeton, IN 47670
Brent D.
Responded to install callback for system not cooling adequately, with indoor temperature at 76°F while set to 72°F and unit running continuously while blowing warm air. Upon arrival, connected refrigerant manifold gauges and verified system pressures and charge levels using R454B refrigerant specifications. Referenced manufacturer charging information and torque specifications to diagnose refrigerant charge issue. System was properly charged to manufacturer specifications per unit nameplate data, restoring proper cooling operation and temperature control.
Princeton, IN 47670
Jeremiah H.
Completed annual Platinum Level maintenance on a 5-year-old HVAC system with a 20x20x2 filter. Performed comprehensive inspection of furnace and air handler components, verified thermostat operation displaying 73°F, replaced air filter, checked all electrical connections, tested system controls, and confirmed proper operation of heating equipment. All equipment found to be functioning within normal parameters with no issues identified during this first visit of the annual service cycle.
Princeton, IN 47670
Brock B.
Completed first annual maintenance visit on a residential HVAC system over 20 years old. Performed comprehensive inspection of outdoor condenser unit, which is protected by a weathered wire cage enclosure with visible corrosion on upper sections. Discovered significant accumulation of decomposed organic debris, primarily leaves and vegetation, within the utility access pit surrounding the sump pump and drainage system at the bottom of the equipment well. Noted standing water present at base of pit. Inspected electrical disconnect box, conduit routing, and refrigerant lines at condenser unit. Documented equipment condition through photographs for maintenance records. System operational at time of service.
Princeton, IN 47670
Brock B.
Completed second annual Platinum Level planned maintenance service on dual HVAC system consisting of outdoor Lennox heat pump unit and secondary condenser unit, both approximately 10 months old. Performed comprehensive inspection and maintenance on both systems including cleaning condenser coils, checking refrigerant levels and pressures, inspecting electrical connections and disconnect boxes, verifying proper amperage draw on compressors and fan motors, and testing thermostat operation. Replaced 16" x 25" x 4" air filters on both systems. Inspected condensate drain lines for proper flow and cleared any blockages. Verified all safety controls and limit switches functioning correctly. Checked mounting pads for levelness and stability on both units. Inspected electrical conduit and wiring for proper installation and secure connections. Confirmed both systems operating within manufacturer specifications with proper temperature splits across evaporator coils. All equipment labels, specific
Princeton, IN 47670
Brock B.
Completed Platinum Level planned maintenance on a 4-year-old single-system HVAC unit. Replaced 25x25x5 air filter, performed comprehensive system inspection of outdoor condenser unit including coil cleaning and operational testing, and documented equipment condition with photos showing unit properly positioned on composite pad with clear airflow access and secure refrigerant line connections.
Princeton, IN 47670
Adam M.
Completed full HVAC system installation consisting of a 2.5-ton, 14 SEER air conditioning unit paired with a 97% AFUE upflow gas furnace in basement location. System installed per manufacturer specifications with proper venting, condensate drainage via PVC piping, and flexible ductwork connections to existing distribution system. All electrical connections completed, thermostat wired, and system tested for proper operation and airflow.
Princeton, IN 47670
Brock B.
Completed Platinum Level maintenance on a 1-year-old Lennox air handler system during the customer's second annual visit. Performed comprehensive inspection of the unit installed in the garage, verified proper ductwork connections and insulation integrity on the flex duct runs, and replaced the 20x20x4 air filter as part of the scheduled maintenance protocol. All system components were found operating within manufacturer specifications, with no deficiencies noted during the inspection.
Princeton, IN 47670
James W.
Conducted comprehensive replacement estimate for residential HVAC system including non-operational gas furnace from early 2000s and 2013 air conditioning unit. Assessed existing outdoor AC unit with cylindrical configuration, electrical disconnect, and PVC condensate drainage, along with gas meter infrastructure and utility connections at brick foundation. Documented current equipment condition, measured installation space requirements, evaluated electrical service capacity, and provided complete system replacement recommendations for both heating and cooling components.
princeton, IN 47670
James W.
Conducted comprehensive assessment of existing packaged heat pump unit serving medium-sized residential structure. Evaluated current Goodman package unit installation, electrical disconnect components, and meter configuration for replacement estimate. Documented equipment specifications, unit placement on concrete pad, electrical service connections, and overall system condition to provide A+ rated energy-efficient replacement recommendation for heating and cooling system upgrade.
Princeton, IN 47670
Jeremiah H.
Completed Platinum Level maintenance on a 4-year-old HVAC system during second renewal visit. Serviced single system with 16x25x4 filter replacement and polarized pad maintenance, performed comprehensive inspection of outdoor condensing unit including electrical connections and conduit, verified proper operation of all components, and documented equipment condition with photos showing unit positioned on isolation pad with proper clearances maintained.
Princeton, IN 47670
