Single Run Evaluation
Calculate single motor run capacitor values from P1 to P2 voltage and conductor amps.
Capacitor diagnostics built for HVAC pros.
Test single and dual run capacitors in the field using live voltage and conductor amp readings. Built for trained HVAC/R technicians who need quick, clear results without extra guesswork.
Built around the way technicians test capacitors.
CapCheck keeps the workflow simple: enter the rated value, measured voltage, amps, and tolerance, then compare the result against an allowed range.
Dual Run Evaluation
Check HERM and FAN sides separately for a clearer view of dual run capacitor health.
50Hz & 60Hz Support
Switch line frequency in settings for work across different equipment and regions.
Custom Tolerance
Use the default 10% tolerance or enter manufacturer tolerance values when needed.
Enter readings. Compare results. Move forward.
CapCheck keeps the capacitor test workflow focused on the values technicians already collect in the field.
Enter rated µF
Start with the capacitor rating from the data plate or manufacturer specification.
Add live readings
Input voltage and conductor amp readings for single run or HERM/FAN dual run checks.
Review the range
See calculated capacitance, deviation, allowed range, and a clear diagnostic status.
Less guessing. More confidence.
GOODPass/fail clarity
µFCalculated capacitance
±%Allowed range
Clean inputs. Clear results.
Designed for quick field use with large values, dark-mode visibility, and direct result cards.
Built for HVAC pros.
Download CapCheck HVAC and test run capacitors with fast, field-ready calculations.