RO# / Customer / VIN: Enter basic job identifiers. VIN auto-fills the Year-Make-Model. (Note: You can edit the Customer and the YMM fields.)
ZIP Code: Pulls local weather data to prefill ambient and RH fields. Tip: If the ambient value doesn't reflect your actual shop conditions, feel free to manually overwrite it.
Static Pressure: Engine OFF β Must open hood and allow system to acclimate (~10β20 min). Install low-side gauge and enter measured PSI. The tool uses ambient temperature to calculate the expected static-pressure range.
Evaluate Fill State: If static PSI is within spec, the system likely has adequate refrigerant.
If in Range: Enter the factory-charge spec and continue to dynamic testing.
If Out of Range: Pause! Print report and recommend recover & recharge before further diagnostic to avoid chasing symptoms.
Federal law requires Section 609 Certification to recover or service automotive A/C refrigerant.
ALWAYS verify the Refrigerant Type and System Label before connecting any recovery or recharge machine.
Use a quality manifold gauge set and calibrated thermometer to confirm static pressure.
Do NOT proceed unless refrigerant type and static pressure are both correct for this system.
Warning: Recovering or charging a system with contaminated or incorrect refrigerant (such as R-134a in an R-1234yf system) can permanently damage your equipment.
π Understanding Temperature Testing Points
π΅ TP #1 β Suction Line (Evaporator Outlet):
Place your temp sensor on the suction line just before the compressor. Used to calculate superheat and measure how much heat the refrigerant absorbed inside the evaporator.
π TP #2 β TXV Inlet (Liquid Line):
Place your temp sensor on the liquid line right before the TXV. Helps detect heat gain, routing issues, or ambient heat soak before refrigerant expands.
π΄ TP #3 β Condenser Outlet:
Place your temp sensor on the liquid line coming out of the condenser. Used for subcooling analysis to confirm proper refrigerant condensation.
Tip: Use all three points for complete thermal-loop validation and to catch blind spots like liquid-line heat gain or TXV imbalance.
Setup Your Shop Branding
βοΈA/C Triage
by Autotech Intelligence
𫧠Expected Static Pressure (Engine Off): Enter ambient temperature
Tip: Install low-side gauge on service port before measuring.
π§― Pressure Relief Observation
Action Required: Start the vehicle. Set A/C to MAX. Watch the high-side gauge and listen for an audible hiss.
Was a pressure relief (hiss) heard?
Tech Note: For best results, run the engine at 800+ RPM, A/C ON MAX, Vent to outside, Blower MAX, condenser fan active.