Princeton Service Overview
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Serving Princeton & 47670: A+ Derr Heating and Cooling provides plumbing, air conditioning, heating, and electrical service throughout Princeton.
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Established Housing: Much of Princeton’s housing dates from the 1960s through the 1980s.
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Four Distinct Seasons: Princeton homeowners’ HVAC needs change throughout the year as the seasons change.
Historic downtown Princeton and the Princeton Theatre & Community Center are familiar parts of the 47670 area, surrounded by residential areas where much of the housing dates from the 1960s through the 1980s. Princeton also moves through four distinct seasons, so what homeowners need from their HVAC systems changes quite a bit over the course of a year. A+ Derr Heating and Cooling provides plumbing, air conditioning, heating, and electrical service throughout Princeton. Call (812) 200-0727 to schedule service for your home.
“Michael was friendly and answered all my questions, when completing my 6 month service. He did an outstanding job and highly recommend APlus Derr!”
— James B
Home Service From Historic Downtown to the Rest of Princeton
You get a good sense of Princeton’s history around downtown, but that is only one part of the community. Lyles Station Historic School & Museum is another recognizable local site, while the Gibson County Fairgrounds gives the 47670 area a gathering place generations of local families know.
The homes themselves have histories too. A large concentration dates from the 1960s, 1970s, and 1980s, but we never assume the equipment inside is the same age as the house. Plenty can change over several decades. When we come through the door, we want to know what system you have now, what it is doing, and what you have noticed.
Getting Princeton Plumbing Problems Under Control
A plumbing problem can change your plans for the day pretty quickly. A toilet that will not work correctly, a drain that keeps giving you trouble, or a water heater problem needs to be traced back to what is actually causing it. We see that same basic reality whether the call takes us closer to historic downtown or farther out into the residential parts of the 47670 area.
Princeton homeowners call for plumbing help with problems such as:
- Drains that keep slowing down or backing up
- Toilets that are not working correctly
- Water heaters that need attention
- Tankless water heater problems
- Sump pumps that need service
- Garbage disposals that stop working
- Sewer or drain concerns
- Piping that needs repair or replacement
- Plumbing components that need installation
- Water filtration needs
A+ Derr provides plumbing repair, installation, and maintenance along with water heaters, tankless systems, sump pumps, sewer and drain service, garbage disposals, toilets, piping and repiping, and water filtration. Much of Princeton’s housing has been standing for several decades, but that does not tell us what plumbing work has already been done. We follow the problem to its source and talk with you about what it will take to fix it.
Request Plumbing Service! Call A+ Derr at (812) 200-0727
Keeping Princeton Homes Cool Through the Warmer Season
Four distinct seasons mean Princeton homeowners eventually reach that point when the heat gets turned off and the AC goes back to work. If the air conditioner has a problem once you are depending on it every day, you usually want an answer sooner rather than later.
Your cooling equipment may need attention when:
- The AC runs without getting the house comfortable
- Cooling suddenly stops
- The system needs repair
- A heat pump is not cooling properly
- Ductless equipment develops a problem
- The AC is due for maintenance
- Existing equipment needs replacement
- You need a new cooling system installed
- Indoor air quality needs attention
- A cooling failure requires emergency service
A+ Derr provides AC repair, installation, and maintenance along with ductless mini-splits, heat pumps, heat pump repair and maintenance, indoor air quality services, and emergency cooling. The Princeton Theatre & Community Center is a familiar part of the historic side of town, but our AC calls can take us into homes throughout the 47670 area. Wherever you are in Princeton, the important question is why your house is not getting comfortable and what we can do about it.
Need AC Service in Princeton? Call (812) 200-0727 to schedule service.
Solving Princeton Home Issues
Problem: A plumbing problem can change your plans for the day pretty quickly.
Solution: A+ Derr provides plumbing repair, installation, and maintenance along with water heaters, tankless systems, sump pumps, sewer and drain service, garbage disposals, toilets, piping and repiping, and water filtration.
Problem: If the air conditioner has a problem once you are depending on it every day, you usually want an answer sooner rather than later.
Solution: A+ Derr provides AC repair, installation, and maintenance along with ductless mini-splits, heat pumps, heat pump repair and maintenance, indoor air quality services, and emergency cooling.
Problem: Much of Princeton’s local housing dates from the 1960s through the 1980s, but decades of repairs and improvements may separate what we find today from what was originally installed.
Solution: A+ Derr provides electrical repair and installation, generators, lighting services, surge protection, panel and meter upgrades, circuit and outlet services, EV chargers, electrical service upgrades, and commercial lighting.
Problem: Furnaces, boilers, heat pumps, and ductless systems come back into regular use as Princeton moves into colder weather.
Solution: A+ Derr provides heating repair, installation, replacement, and maintenance. We also service furnaces, boilers, heat pumps, ductless mini-splits, geothermal systems, and indoor air quality equipment.
Heating Help When Princeton Turns Colder
The seasonal change eventually goes the other direction. Furnaces, boilers, heat pumps, and ductless systems come back into regular use as Princeton moves into colder weather. That makes fall a good time to pay attention to a heating system that is not starting, is not keeping the house comfortable, or is due for maintenance.
We can help when:
- A furnace will not heat the house
- Heating equipment needs repair
- The system needs seasonal maintenance
- A boiler needs attention
- A heat pump is not heating correctly
- Ductless heating develops a problem
- Existing equipment needs replacement
- A new heating system needs installation
- Indoor air quality needs attention
- A loss of heat requires emergency service
A+ Derr provides heating repair, installation, replacement, and maintenance. We also service furnaces, boilers, heat pumps, ductless mini-splits, geothermal systems, and indoor air quality equipment. As the local calendar and seasons move along, we can help make sure the heating side of your home is ready when you need it.
Schedule Heating Service today! Call A+ Derr at (812) 200-0727 or contact us online today.
“Kevin was very professional, explained everything as he was working on my ac unit. Was on time and had everything fixed, cleaned out and go within 1 hour. Highly recommended.”
— Tena F
Electrical Repairs and Upgrades Across 47670
Princeton’s housing history matters in a different way when we talk about electrical work. Much of the local housing dates from the 1960s through the 1980s, but decades of repairs and improvements may separate what we find today from what was originally installed. That is why we want to see the existing electrical system before talking about a repair or larger upgrade.
Electrical work may be needed when:
- A circuit or outlet needs repair
- You need additional circuits or outlets
- Lighting needs repair or installation
- You are considering a panel or meter upgrade
- The property needs an electrical service upgrade
- You want to add a generator
- Surge protection is being considered
- You are planning an EV charger installation
A+ Derr provides electrical repair and installation, generators, lighting services, surge protection, panel and meter upgrades, circuit and outlet services, EV chargers, electrical service upgrades, and commercial lighting. If you are planning something new, we look at what the home has now and what the project will require. That gives us a much better starting point than making assumptions simply because the house has been part of Princeton for several decades.
Need an experienced electrician in Princeton? Call (812) 200-0727 to get a clear quote!
One Company for Princeton’s Changing Home-Service Needs
The Gibson County Fairgrounds becomes a center of local activity during the Gibson County Fair, with rides, food, fireworks, truck and tractor pulls, and other events. Spring Street Market adds another familiar event to Princeton’s calendar. Those are the kinds of local traditions that make the 47670 area feel like home to the people who live here.
Inside the house, what needs your attention can easily change. A plumbing repair may be the priority today, followed months later by AC maintenance, a heating problem, or an electrical project. A+ Derr works across all four service categories, so you have one company to call as those needs change.
We also provide emergency heating and cooling when losing comfort cannot wait for a routine appointment. Our technicians focus on finding the problem, explaining it in terms you can understand, and helping you decide what comes next.
“The tech showed up and was very thorough with everything. He did a great job. Will call again if I ever have any issues.”
— Tina J
When Your Princeton Home Needs Service
When your Princeton home has a plumbing issue, cooling problem, heating failure, or electrical need, A+ Derr Heating and Cooling can help. We provide dependable service throughout 47670, including homes near historic downtown and neighborhoods across the surrounding community. Our team works with you to identify the problem and recommend the right solution for your home. Call (812) 200-0727 or contact us online to arrange service in Princeton.
FAQs for Homeowners in Princeton, IN
What plumbing services does A+ Derr provide in Princeton?
A+ Derr provides plumbing repair, installation, and maintenance along with water heaters, tankless systems, sump pumps, sewer and drain service, garbage disposals, toilets, piping and repiping, and water filtration.
What cooling services does A+ Derr provide in Princeton?
A+ Derr provides AC repair, installation, and maintenance along with ductless mini-splits, heat pumps, heat pump repair and maintenance, indoor air quality services, and emergency cooling.
What heating services does A+ Derr provide in Princeton?
A+ Derr provides heating repair, installation, replacement, and maintenance. We also service furnaces, boilers, heat pumps, ductless mini-splits, geothermal systems, and indoor air quality equipment.
What electrical services does A+ Derr provide in Princeton?
A+ Derr provides electrical repair and installation, generators, lighting services, surge protection, panel and meter upgrades, circuit and outlet services, EV chargers, electrical service upgrades, and commercial lighting.
Page Updated on September 22, 2026
Recent Jobs and Reviews in Princeton, IN
Princeton, IN at a glance
A+ Derr Heating & Cooling has completed 20 jobs in Princeton, IN in April 2026.
The most recent job was on April 29, 2026.
A+ Derr Heating & Cooling has completed 123 jobs in Princeton, IN in the last 12 months.
Job Locations and Reviews
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.
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.
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.
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.
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.
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.
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.
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.
# 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.
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.
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.
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.
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.
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.
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.
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
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.
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.
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.
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.
