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 between July 2026 and August 2026.
The most recent job was on August 5, 2026.
A+ Derr Heating & Cooling has completed 123 jobs in Princeton, IN in the last 12 months.
Job Locations and Reviews
Responded to no cooling complaint on 8-year-old residential air conditioning system. Upon arrival, diagnosed compressor failure to engage. Connected manifold gauges to service ports and tested R410A refrigerant pressures and temperatures using digital diagnostic equipment. System pressures indicated abnormal readings consistent with compressor malfunction. Verified electrical supply to condensing unit, tested capacitor functionality, and confirmed compressor would not start under normal operating conditions. Completed diagnostic testing and provided repair recommendations to restore cooling operation.
Completed monthly Gold Level planned maintenance on single 8-year-old residential HVAC system. Performed comprehensive system inspection including condenser unit examination with top panel removed to assess compressor, refrigerant lines, and condenser coil condition. Utilized Fieldpiece digital manifold gauge to verify system pressures and temperatures, recording operational readings to ensure proper refrigerant charge and system performance. Observed normal wear consistent with system age, including minor debris accumulation on condenser coil and slight fin compression. All components functioning within acceptable parameters at time of inspection.
Completed first scheduled quarterly maintenance visit on Lennox HVAC system. Replaced 16X25X5 air filter and performed standard system inspection and preventive maintenance procedures to ensure optimal equipment performance.
Responded to no-cooling complaint on 6-year-old rooftop unit with reported loud whirring noise and 8-degree temperature differential between thermostat setpoint and actual room temperature. Accessed rooftop unit, inspected blower assembly and identified failing condenser fan motor causing excessive noise and inadequate heat rejection. Replaced defective motor, verified proper capacitor operation, tested system operation with normal amp draw and airflow restored, and confirmed cooling cycle functioning within manufacturer specifications.
Completed one-time planned maintenance service on residential HVAC system at vacant property in preparation for sale. Performed comprehensive inspection of forced air furnace in basement mechanical room, including examination of heat exchanger, burner assembly, blower motor, and air filter replacement. Verified proper operation of thermostat controls, tested heating cycle, and confirmed system functionality with temperature set at 73°F. Inspected refrigerant lines, ductwork connections, and plenum components for proper sealing and condition. All equipment found to be in normal operating condition with no deficiencies noted. System left in proper working order and ready for property transfer.
Responded to service call for 10-year-old heat pump system experiencing repeated freeze-up issues following previous refrigerant leak repair. Conducted comprehensive system evaluation and documented existing equipment configuration, including indoor air handler with upflow plenum arrangement and outdoor heat pump unit. Provided detailed replacement estimate for complete heat pump system to address ongoing reliability concerns and avoid continued repair costs on aging equipment.
# Electrical Panel Service and Basement Wiring Installation Serviced and upgraded outdoor electrical meter panel mounted on exterior brick wall. Installed new circuit breakers and routed additional electrical cables through panel enclosure, including heavy-gauge red conductor and multiple black service wires. Secured all cable entries with proper clamps and connectors, ensuring code-compliant installation. Added curved metal conduit connector to left side of panel housing for additional circuit routing. Verified grounding connections to existing vertical conduit system. Completed basement electrical rough-in work, running multiple flexible conduit circuits through exposed ceiling joists. Installed new electrical panel on basement wall with proper mounting and clearance requirements. Added secondary electrical enclosure for circuit distribution. Installed new electrical outlet on lower wall section for basement utility service. All wiring secured to structural members per code require
Completed installation of 3-ton, 23.5 SEER heat pump system with 99% AFUE upflow gas furnace, including iWave air purification system with polarized filtration technology. Installed 50-gallon State Industries natural gas automatic storage water heater (Model 1600) with expansion tank, complete copper and PVC supply plumbing, red-handled shut-off valves, and proper venting in accordance with CSA/ANSI Z21.10.1/CSA 4.1-2019 standards. All systems tested, operational, and performing to manufacturer specifications.
Responded to cooling complaint on 1-year-old Lennox system struggling to maintain setpoint. Upon arrival, found thermostat calling for cooling with indoor temperature at 72°F and setpoint at 70°F, while outdoor temperature was 87°F. Inspected outdoor condensing unit and confirmed proper operation of compressor and condenser fan. Checked refrigerant pressures, airflow, and electrical connections. System operating within manufacturer specifications. Advised customer that unit is functioning properly but may experience extended run times during peak outdoor temperatures, which is normal for the equipment size and ambient conditions. No repairs required at this time.
Completed Platinum Level annual maintenance on a 5-year-old HVAC system during the first scheduled visit. Performed comprehensive inspection of furnace unit, verified proper operation of all components, checked ductwork and insulation integrity, inspected condensate drain pan and PVC drainage lines, and replaced air filter per maintenance protocol. System operating within manufacturer specifications with no issues identified.
Conducted comprehensive assessment of existing HVAC system including Robertshaw digital thermostat and attic-mounted air handler unit with refrigerant lines and ductwork. Documented current system condition through detailed photography and discussed replacement options with homeowner, scheduling follow-up appointment for new system estimate with financing information.
Conducted follow-up site visit to assess and document incomplete HVAC installation work. Inspected ductwork and insulation materials in attic space, photographed tan-colored metal duct components and reflective flexible insulation material to document current installation status for completion of outstanding work items.
Completed full HVAC system installation consisting of a 3.5-ton, 15.5 SEER air conditioning condenser unit and 97% AFUE furnace with blower assembly. The outdoor Lennox condenser was positioned on gravel bed against exterior siding with copper refrigerant lines properly routed and secured to the structure, while the indoor air handler was installed and verified operational with all components labeled and accessible for future service.
Conducted comprehensive assessment of existing HVAC system for complete replacement estimate. Inspected current Robertshaw digital thermostat displaying 77.8°F and evaluated ceiling-mounted supply/return vent system with standard white metal grille in drop ceiling configuration. Documented existing equipment conditions through detailed photography to support Green-rated A+ replacement proposal specifications. System evaluation completed to provide customer with accurate equipment replacement recommendations and energy-efficient upgrade options.
Responded to no-cool service call on single-story residential property where system had frozen evaporator coil. Upon arrival, found air handler in interior closet with ice buildup that had been previously identified by handyman, unit was already shut down per recommendation to allow defrosting. Inspected Robertshaw thermostat showing 77.2°F reading, verified system was off and assessed HVAC equipment located in utility closet alongside water heater. Documented existing conditions with photos showing air handler unit with visible manufacturer labels and connected ductwork, confirmed active water leakage from melting ice with no structural damage reported at time of service.
Conducted comprehensive site assessment for complete HVAC system replacement. Documented existing outdoor condenser unit showing significant age and weathering, and created detailed technical schematic of current ductwork configuration including furnace dimensions, return air measurements, and airflow pathways to provide accurate equipment sizing and installation specifications for Green A+ tier replacement proposal.
Responded to no cooling complaint on 25+ year old residential HVAC system. Upon arrival, thermostat displayed 79°F with setpoint at 70°F, indicating significant temperature differential. System was off at time of service due to recurring freezing issue at outdoor condenser unit, similar to previous year's failure. Performed comprehensive diagnostic evaluation and completed EDS load calculation for 1,519 square foot residence to assess system capacity requirements. Documented current system conditions including low airflow concerns and freeze-up symptoms at condensing unit. Provided technical assessment and recommendations for aging equipment replacement based on system age, recurring failures, and proper sizing requirements for the structure.
Completed first scheduled maintenance visit on HVAC system, replacing 16x25x5 filter as part of three-month service interval. Verified system static pressures using dual-port manometer, recording supply and return readings of 165 and 162 respectively, confirming proper airflow and system balance. Inspected installation levelness and mechanical components, ensuring all equipment operates within manufacturer specifications.
Completed installation of a 2.5-ton, 15.5 SEER Lennox air conditioning system with matching evaporator coil at residential property. The outdoor condenser unit (model 13ACX-LQ30-230A03) was positioned on a concrete pad against the building exterior with proper clearance for airflow and service access, electrical disconnect box mounted on siding with conduit run to unit, and refrigerant line set connected with insulated wrap at penetration point.
Conducted comprehensive assessment of 18-year-old cooling system located in basement crawl space of large residential property exceeding 2,200 square feet. Evaluated existing air handling unit, ductwork infrastructure, and overall system condition to provide complete replacement estimate. Documented equipment specifications, existing installation configuration, flexible duct conditions, and accessibility constraints within confined crawl space environment for full system replacement proposal.
