App Support
HVAC Charge Check
HVAC Charge Check is an offline superheat and subcooling calculator for HVAC field service calls. It helps technicians compare pressure-temperature readings against target charge conditions and get a simple Add, Hold, or Recover verdict.
Launch scope
- Superheat checks for fixed-orifice, piston, and cap-tube systems
- Subcooling checks for TXV and EEV systems
- Common refrigerants including R-410A, R-22, R-32, R-454B, R-407C, and R-134a
- Local saved job checks for quick field notes
- No account, subscription, ads, analytics SDK, or network requirement for the core workflow
FAQ
Does it work offline?
Yes. The launch build performs its core workflow on device and does not require an account.
Does it collect my data?
No. The launch build does not include ads, analytics SDKs, or remote account storage.
How do I report an issue?
Email the support address with your device model, iOS version, app version, refrigerant, pressure, line temperature, and the steps you used.
Product note: HVAC Charge Check is a field math utility. Always follow equipment manufacturer charging procedures and stabilize airflow and load before relying on a charge decision.