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 March 2026 and April 2026.
The most recent job was on April 6, 2026.
A+ Derr Heating & Cooling has completed 123 jobs in Princeton, IN in the last 12 months.
Job Locations and Reviews
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.
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.
# HVAC Service Completed Responded to service call for 5-year-old air conditioning system with inoperative fan and complete loss of heating and cooling capability. Upon arrival, performed visual inspection and diagnostic testing of outdoor condensing unit. Identified failed contactor as primary issue preventing compressor and condenser fan operation. Contactor showed signs of electrical failure with burned or pitted contacts preventing proper circuit closure. Verified all wire connections at contactor terminals for proper seating and condition, noting multiple color-coded wires including line voltage and control circuit wiring. Utilized Fieldpiece SMAN digital manifold gauge set to assess system pressures and temperatures. Connected refrigerant hoses to service ports and recorded operating parameters. Display readings indicated abnormal pressure conditions consistent with non-operational compressor. Monitored both high-side and low-side pressures along with corresponding saturation
Completed follow-up visit to repair duct seals on furnace exhaust and intake connections. Inspected Lennox furnace installation, resealed PVC intake and exhaust piping at connection points to ensure proper airtight operation, and verified system functionality upon completion.
Completed maintenance callback to diagnose system malfunction and identified failed control board requiring replacement. Performed electrical diagnostics using multimeter to test circuit breaker connections and verify voltage readings at air handler control panel. Documented equipment model and serial number information, captured photos of defective control board and system configuration for part ordering purposes, with estimated 90-minute installation time upon part arrival.
Conducted comprehensive assessment of existing basement cooling system for residential property sized between 1001-1599 square feet to provide replacement estimate. Evaluated current unit configuration, ductwork infrastructure, and installation accessibility in confined crawl space area with exposed structural elements. Documented existing HVAC system conditions including flexible duct routing, electrical connections, and clearance requirements for equipment replacement. Photographed installation site showing spray foam insulation, metal piping runs, and available workspace for new equipment installation to ensure proper sizing and configuration recommendations for replacement cooling system.
Responded to no cooling complaint on 2-year-old residential HVAC system. Upon arrival, verified adequate airflow at registers with no ice buildup on evaporator coil. Performed diagnostic evaluation of thermostat operation and temperature differential between thermostat reading and actual room temperature. Inspected control board, wiring connections, and electrical components within air handler cabinet. System found operating within normal parameters with proper cycling and no mechanical or electrical faults detected. Advised on thermostat calibration and proper temperature expectations for optimal system performance.
# HVAC Service Completed Responded to service call for 9-year-old air conditioning system running but not cooling properly. Upon arrival, performed comprehensive diagnostic evaluation of the cooling system and indoor air handler unit. Conducted visual inspection and measurements of internal components, including refrigerant lines, electrical connections, and junction box terminals. Opened furnace access panel to examine heat exchanger and internal ductwork configuration. Documented system measurements and component conditions with detailed photographs for service records. Identified failed component affecting cooling performance and completed necessary replacement to restore proper system operation. Verified all electrical connections at terminal block were secure and properly fastened. Inspected condensate drain lines and PVC venting system for proper drainage and clearance. System returned to normal cooling operation following repairs. Customer requested name of replaced part and
Completed installation of 2-ton, 18 SEER air conditioning system with 97% AFUE upflow furnace in basement location. System commissioning verified proper static pressures with manometer readings of 169 and 160, confirming optimal airflow through ductwork and equipment operation within manufacturer specifications.
Responded to warranty service call for noisy blower motor. Upon inspection, confirmed blower motor is currently operational but producing excessive noise indicating bearing wear or internal component degradation. Documented electrical connections and motor wiring configuration. Blower motor replacement required to prevent future failure; system remains functional at this time with green priority status.
Completed initial planned maintenance visit at commercial office space. Performed comprehensive inspection of outdoor condensing unit, verified proper operation of all components, and checked refrigerant line connections and electrical disconnect. Replaced air filter with new Filtrete 2000 allergen-rated filter (20x25) at indoor air handler location.
Completed comprehensive HVAC system evaluation for full replacement estimate at residential property. Assessed existing outdoor condensing unit positioned on concrete pad against brick exterior and inspected Nest thermostat with multi-stage wiring configuration including Y1, Y2, G, O/B, RC, W1, W2/AUX, C, and RH terminals. Documented current system condition and provided detailed replacement options with financing information based on previous recommendation from another contractor that complete system replacement was necessary.
Completed planned maintenance on residential HVAC system, replacing 16x25x5 filter media in air handler unit. System has been on monthly maintenance schedule for five years, showing expected wear and aging on interior components with visible surface deterioration and discoloration on access panels. Verified proper filter fitment and confirmed unit operational status following filter replacement.
# Service Summary Completed scheduled annual maintenance on Lennox HVAC system. Replaced 20x20x5 air filter per manufacturer specifications on one-year-old unit during second service visit. Performed standard preventive maintenance inspection, verified proper operation of all components including condensate pump assembly, checked refrigerant lines and PVC drainage connections, and updated maintenance records on unit.
Performed first maintenance visit on a 5-year-old HVAC system under Gold Level service plan. Inspected furnace unit in utility closet, noting proper installation and functional condensate drainage system. Replaced 20x20x2 filter and documented system specifications for future reference.
Performed annual platinum level maintenance on a single HVAC system (installed 12/15/25). Verified system level and inspected control board connections for proper operation. Replaced 16x25x5 filter during this first visit; system is not due for renewal. All components functioning properly with no issues detected.
Completed monthly maintenance service on Platinum Level HVAC system, including replacement of 16x25x5 filter (now in its 4th year). Observed and documented interior duct deterioration at wood-concrete junction showing possible moisture damage. Thermostat was operational, displaying 64°F during inspection.
Completed scheduled Platinum Level maintenance on residential HVAC system, replacing the 16x20x5 filter as part of the second visit in a four-year maintenance plan. Visual inspection of the furnace unit in utility closet confirmed proper installation with all safety labels intact and no visible issues.
Performed diagnostic inspection on customer's one-year-old Lennox HVAC system covered under home warranty. Examined mechanical closet setup including air handler unit, ductwork insulation, condensate drainage, and control components. System was operational during inspection with no immediate concerns identified.
Completed second maintenance visit of Gold Level agreement on 7-year-old HVAC system. Inspected furnace system, connections, and ductwork in basement mechanical room. Noted 16x25x5 filter replacement and confirmed annual renewal is due. Left voicemail for customer regarding scheduling next maintenance appointment.
