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 April 2026 and July 2026.
The most recent job was on July 1, 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 25-year-old packaged cooling unit for small residential property (0-1000 sq.ft.). Evaluated existing system condition, noting aged equipment purchased used and nearing end of service life. Documented crawl space installation with evidence of moisture intrusion and water damage to surrounding structural components, including deteriorated flex ductwork with compromised insulation. Photographed basement area and underfloor access points to support replacement recommendation. Provided detailed estimate for complete HVAC system replacement with energy-efficient equipment suitable for property size and packaged unit configuration.
Completed second annual planned maintenance visit on single-system HVAC unit as part of Gold Level service agreement. Performed comprehensive system diagnostics using digital multimeter to verify electrical performance, measuring capacitor functionality and voltage readings on outdoor condensing unit. Replaced 16x20x5 air filter and conducted full system inspection to ensure optimal operation and efficiency.
# HVAC Maintenance Completed Performed planned preventative maintenance on residential HVAC system. Conducted comprehensive electrical diagnostics using clamp meter to verify system performance. Measured and recorded compressor amperage draw at 8.18 amps and supply voltage at 522 volts, confirming equipment operating within manufacturer specifications. Inspected capacitor connections and verified all electrical terminals secure with proper wire routing. Examined refrigerant line insulation for deterioration and checked copper tubing for signs of wear or damage. All components functioning properly with no deficiencies noted at time of inspection.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
# 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
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.
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.
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.
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.
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.
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.
