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
Christian C.
Completed monthly planned maintenance visit on Gold Level system over 10 years old. Performed comprehensive inspection of outdoor unit electrical control panel and indoor air handler components, documenting equipment condition with photographs. Verified all electrical connections, contactors, relays, and control wiring are secure and functioning properly, with no immediate safety concerns identified despite age-related weathering on exterior components.
Princeton, IN 47670
Tyler C.
Responded to follow-up service call for 3-ton 19 SEER heat pump and air handler system experiencing temperature control issue where thermostat set to 74°F but home temperature reading 75°F. Inspected smart thermostat settings and connectivity, verified Wi-Fi connection to SpectrumSetup-TC26 network, and reviewed system configuration including Fault Line™ feature and temperature calibration settings. Documented thermostat interface and connectivity status, coordinated with customer to schedule return appointment for further diagnosis and temperature differential correction.
Princeton, IN 47670
Danny M.
Responded to emergency service call for central air conditioning system reported to be leaking while maintaining cooling operation. Upon arrival, conducted thorough inspection of HVAC system and surrounding utility area. Identified active water leak originating from condensate drainage system. Traced condensate line routing through basement mechanical room and discovered blockage causing overflow condition. Cleared obstruction from condensate drain line and verified proper drainage flow. Inspected evaporator coil drain pan for cracks or deterioration and confirmed structural integrity. Tested system operation under load to ensure condensate removal functioning correctly. Cleaned up standing water from concrete floor using wet vacuum. Monitored system through complete cooling cycle to verify leak resolution and confirm no further water discharge onto floor. System restored to normal operation with proper condensate drainage established.
Princeton, IN 47670
Danny M.
Responded to no cooling complaint on 15-year-old system. Upon arrival, unit was blowing cold air and cycling properly with thermostat set at 70°F and indoor temperature reading 80°F. Performed system diagnostics including electrical checks, refrigerant pressure testing, and airflow evaluation. No frozen coils, tripped breakers, or immediate mechanical failures observed. System operating within normal parameters at time of inspection.
Princeton, IN 47670
Jeremiah H.
Completed monthly Gold Level planned maintenance on 22-year-old single HVAC system. Replaced two 16x20x1 filters, inspected wall-mounted unit showing clean exterior condition with no visible damage or deterioration, verified proper operation of control indicators, and documented system status through photographic records.
Princeton, IN 47670
Jeremiah H.
Completed monthly Gold Level planned maintenance on single-system HVAC equipment consisting of a 9-year-old air conditioning unit and 29-year-old furnace. Performed comprehensive system inspection including filter replacement with 16x25x1 filter, verified outdoor condenser unit operation and clearances, checked refrigerant levels and electrical connections, inspected indoor air handler components, and confirmed proper airflow through ventilation system. All equipment operating within normal parameters with no immediate service needs identified.
Princeton, IN 47670
Christian C.
Completed annual preventative maintenance inspection on one-year-old HVAC system. Performed comprehensive evaluation of furnace components including blower motor assembly, gas valve controls, main control board, and electrical connections. All systems operating within normal parameters; documented equipment condition with interior cabinet photography showing proper wiring configuration and component placement. Verified 16x25x5 filter size for future service reference.
Princeton, IN 47670
Ricky B.
Responded to no cooling complaint on 5-year-old residential system with reduced airflow and inability to maintain setpoint temperature. Upon arrival, discovered entire system frozen from evaporator coil through refrigerant lines to outdoor compressor unit. Advised customer to switch thermostat to fan-only mode to allow system to defrost before diagnostic work could be performed, requiring afternoon return visit to complete proper assessment and repairs once ice had melted.
Princeton, IN 47670
James W.
Conducted comprehensive replacement estimate for aging HVAC system over 20 years old that is no longer operational. Evaluated existing outdoor condenser unit with green cabinet and indoor furnace/air handler with extensive copper piping network showing significant age and oxidation. Assessed complete system replacement requirements including outdoor condensing unit, indoor air handling equipment, refrigerant line sets, electrical disconnects, and existing ductwork connections to provide homeowner with full replacement options and specifications.
Princeton, IN 47670
Cole B.
Completed full HVAC system installation including a 3-ton, 19 SEER heat pump outdoor unit and matching air handler with gas furnace backup. The outdoor condenser was positioned on a composite pad against the exterior brick wall with proper clearances maintained, electrical disconnect installed with code-compliant conduit routing, and refrigerant lines connected and charged to manufacturer specifications. Indoor equipment consisting of the air handler and A.O. Smith water heater was installed in the utility closet with proper venting, condensate drainage, and ductwork connections completed. All electrical connections were terminated, system startup procedures performed, and operational testing confirmed proper heating and cooling performance across all zones.
Princeton, IN 47670
Craig U.
# HVAC Service Call: Air Conditioning System Inspection Responded to service call for residential air conditioning unit experiencing ice formation on refrigerant line while system continued to operate. Upon arrival, confirmed customer had properly shut down compressor and left fan running as previously instructed. Performed comprehensive inspection of 12-year-old AC system. Examined outdoor condensing unit positioned on concrete pad against exterior wall, noting unit construction with horizontal fin louvers and top-mounted fan assembly. Verified electrical disconnect box and conduit connections at wall mount. Documented equipment specifications and manufacturer information visible on unit nameplate. Conducted interior electrical panel inspection, photographing circuit breaker configuration and panel directory for service records. Assessed dual-row breaker arrangement and verified proper labeling documentation. Ice formation on suction line typically indicates restricted airflow, lo
Princeton, IN 47670
Brock B.
Completed Platinum Level planned maintenance on a one-year-old single HVAC system during its first annual service visit. Performed comprehensive system diagnostics using refrigerant manifold and micron gauge to verify operating pressures, temperatures, and refrigerant charge levels, with readings indicating system operating within normal parameters. Replaced 16x25x5 air filter and documented system performance with photographic records for maintenance history.
Princeton, IN 47670
Brock B.
Completed second annual Platinum Level maintenance on 4-year-old single-system HVAC unit. Performed comprehensive inspection of outdoor condensing unit, replaced 16x25x2 air filter, checked refrigerant levels, cleaned coils, verified electrical connections, and tested system operation to ensure optimal performance for the upcoming season.
Princeton, IN 47670
Jeremiah H.
Completed annual Platinum Level maintenance on a 5-year-old HVAC system, including replacement of 20x25x5 filter and comprehensive inspection of all components. Identified deteriorated PVC coupling at base of condensate drain line with visible cracking and material breakdown requiring attention. Documented plumbing infrastructure including shut-off valves, insulated piping, and drain pan positioning for system monitoring.
Princeton, IN 47670
Adam M.
Completed installation of a 3-ton, 15.5 SEER, 97% AFUE Princeton complete HVAC system. Performed system commissioning with manometer readings confirming proper static pressures and airflow, verified all electrical connections, and tested system operation to ensure optimal performance.
Princeton, IN 47670
Brock B.
Completed planned preventive maintenance on residential Lennox air conditioning system. Performed comprehensive AC tune-up including inspection of condenser unit, refrigerant lines, electrical connections, and operational testing to ensure proper system performance for the cooling season.
Princeton, IN 47670
James W.
Conducted comprehensive HVAC replacement estimate for residential property experiencing system performance issues. Evaluated existing ductwork installation in mechanical area, noting gray metal rectangular duct sections with visible wear, dust accumulation, and deteriorating foil tape seals at joints. Assessed interior ventilation components including wall-mounted return air grille located adjacent to main staircase, inspected overall system configuration and documented current conditions through photographic documentation to provide accurate replacement recommendations and financing options.
Princeton, IN 47670
Tyler C.
Responded to customer concern regarding thermostat power loss and performed comprehensive Platinum Level planned maintenance on single-system NSSU unit. Began inspection with outdoor unit as requested, then proceeded to indoor components. Verified thermostat power and control board operation with all indicator LEDs functioning properly. Inspected and tested control board connections, terminal strips, and wiring integrity. Checked system levelness and mounting stability of air handler. Replaced 20x20x5 air filter. Performed complete system evaluation including refrigerant levels, electrical connections, condensate drainage, and overall operational performance. System restored to proper working condition with all components operating within manufacturer specifications.
Princeton, IN 47670
Drake H.
Completed full ductwork installation in crawl space area beneath residential structure. Installed insulated flexible ductwork throughout the underfloor space, properly secured with strapping to wooden floor joists to ensure stable positioning and prevent sagging. Routed ductwork to optimize airflow distribution while navigating existing electrical wiring and structural support elements. All ductwork wrapped with reflective silver insulation material to maximize energy efficiency and prevent condensation issues in the unconditioned crawl space environment. Installation completed in accordance with HVAC industry standards for residential duct systems.
Princeton, IN 47670
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
