HVAC & Plumbing Repair & Accurate Diagnostics
The right repair starts with the right diagnosis. We investigate the problem with advanced testing gear, explain our findings in plain language, and prioritize practical repairs for the equipment you already own.
We Test. We Don't Guess.
Modern HVAC equipment—especially inverter heat pumps, ductless systems, and high-efficiency boilers—involves complex electronics and microprocessors. Swapping random parts until the unit turns on is costly and ineffective.
At NexPro, our 15 years of technical experience allows us to systematically verify sensor tolerances, communication buses, and electrical loads. We isolate whether a fault is a $150 electrical component or a deeper mechanical failure.
Our Diagnostic Fee Policy:
We charge an upfront diagnostic fee to inspect, test, and pinpoint the issue. This guarantees your technician is focused on a thorough analysis rather than rushing to sell you a replacement system.
What We Inspect During a Diagnostic Call
Electrical & Inverter Board Testing
Using calibrated digital multimeters to measure supply voltage, capacitor microfarads, control transformer output, sensor resistances (thermistors), and inverter communication signals.
Refrigerant & Pressure Verification
Connecting digital manifold gauges to verify subcooling, superheat, saturation temperatures, and expansion valve operation without unnecessary venting or guess-work.
Airflow, Static Pressure & Draft Check
Checking static pressure across coils, blower wheel balance, filter restrictions, and combustion draft on furnaces or boilers to confirm safe venting.
Mechanical & Hydronic Integrity
Testing circulator pumps, zone valves, expansion tanks, condensate lines, safety float switches, and plumbing connections for leaks or mechanical binding.
Told You Need an Immediate $15,000+ Replacement?
Before committing to a complete system overhaul, let NexPro inspect your equipment. We frequently discover that systems condemned by sales-driven companies can be reliably restored with an isolated repair.
Book a Diagnostic or Repair Visit
Describe your symptoms. We service Newton, Wellesley, Needham, Weston, Brookline, Waltham, and Watertown.