This calculator is an assistant, not a final diagnosis. Always verify with service procedures, pressure-temperature relationship, frost pattern, airflow, and manufacturer documentation.
FZ °F
FF °F
✓ Pre-Check Passed
Airflow and operating conditions verified. Proceed to sealed system diagnosis.
Air Temperature
Filter Drier
Refrigerant Line Temps(Optional)
Evaporator Delta-T
—
Condenser Delta-T
—
Filter Drier Delta-T
—
Enter the cumulative amount added during the entire diagnostic test, not only the last addition. e.g. Added 1 oz → enter 1 · added 1.5 more → enter 2.5 · added 0.5 more → enter 3.0
Air Temperature Inputs — After
InitialAfter
LOW SIDE
Evap Sat. Tempfrom low-side pressure——
Suction Line Tempat compressor inlet——
↓
Superheat——
Suction Stateexpect: Superheated Vapor——
Evap Tempcoil surface clamp——
Evap Stateexpect: Saturated——
HIGH SIDE
Cond Sat. Tempfrom high-side pressure——
Liquid Line Tempafter condenser——
↓
Subcooling——
Liquid Line Stateexpect: Subcooled Liquid——
Evaporator TDbox temp − evap sat temp——
Condenser Splitcond sat temp − ambient——
Run analysis to see calculated values.
LOW SIDE
Evap Sat Temp—
Superheat—
Suction State—
Evaporator TDair in − sat temp—
HIGH SIDE
Cond Sat Temp—
Subcooling—
Liquid Line State—
Condenser Splitsat temp − ambient—
Compressor Protection—
Enter refrigerant and at least one pressure to begin.
Runs a fixed test case through the PT lookup and linear interpolation engine. Every arithmetic step is shown.
RefrigerantR-600a (isobutane)
Low Side0 psig
High Side140 psig
Suction Line Temp50 °F
Liquid Line Temp95 °F
History
No saved cases.
Run analysis to see debug values.
Estimate expected suction and discharge pressures from measured evaporator and condenser temperatures — no gauges required.
Refrigerant is taken from System Setup above.
Enter at least one temperature above to see estimated pressures.
Diagnose equalization behavior and detect restrictions from qualitative field observations.
Score observed conditions against Whirlpool fault profiles (PUB W10683203). Answer any combination — more inputs = more accurate results.
Access service documentation, wiring diagrams, and technical bulletins organized by brand and model. Full manual library coming soon.
In Development
Theme
Theme customization is coming in a future update. The app currently uses an optimized dark theme for outdoor readability.
Pressure
Temperature
Refrigerant Charge
Vacuum
Electrical
Volts (V), Amps (A), and Ohms (Ω) — standard electrical units used throughout the app.
✓ Units saved
Compact Mode
Reduce spacing between elements for more content per screen.
Large Text Mode
Increase base text size for better readability in the field.
Theme
Contact Support
For technical issues with the app, use the Feedback section. Cloud-based support and live chat are planned future features.
Report App Problem
Found a bug, broken link, or incorrect diagnostic logic?
Submit Data Correction
Incorrect service test information, wrong voltage specs, or missing model data?
🔧
Diagnostic Tool
Version 1.0 · Phase 23 Build
What's Included
Diagnostic Trees (Refrigerator / Freezer), Sealed System Analyzer with pressure-temperature calculations, How to Diagnose component guides, Service Modes & Tech Sheets (Whirlpool / Maytag / KitchenAid), and Case Library.
Coming Soon
Additional appliance categories (washers, dryers, dishwashers), more brand service data, manual import workflow, and cloud sync for case library and feedback.
Disclaimer
This tool assists qualified appliance repair technicians. Always verify readings and follow manufacturer service procedures. Data provided for reference only.
⚠ Manual import is not automated yet — this is a future feature.
Core Rule: Manuals → Technician Knowledge
Photos of manuals are never stored as document archives. Every page is extracted and converted into structured, searchable technician content linked across the entire app.
What gets extracted
Service Modes & Test Sequences → Service Modes
Error Codes & Fault Descriptions → Diagnostic Trees
Component Test Procedures → How To Diagnose
Thermistor Tables, Pressure Charts → Sealed System Analyzer
Wiring Diagrams & Connector Pinouts → How To Diagnose
Real repair cases & notes → Case Library
Planned Import Workflow
Photograph each page of the service manual or tech sheet.
Upload photos — app extracts structured data automatically.
Model is indexed and cross-linked across Diagnostic Trees, Service Modes, How To Diagnose, and Sealed System Analyzer.
Every future diagnostic session for that model surfaces the relevant data inline.
When it's ready
An "Import Manual" button will appear here. Photograph each page, submit for processing, and the extracted knowledge will be available throughout the app within the same session.
Language
Navigation labels update immediately. Technical diagnostic content (service tests, component specs) remains in English for accuracy.
Report an Issue
Feedback is saved locally on this device. Cloud sync will be added later.
✓ Feedback saved locally. Cloud sync will be added later.
Saved Feedback
💨
Diagnose Evaporator Fan
Guided evaporator fan diagnosis will be available here. Repair the evaporator fan system before returning to sealed system diagnostics.
In Development
🧹
Condenser Cleaning Procedure
Step-by-step condenser cleaning procedure will be available here. Clean the condenser coil and retest before performing sealed system diagnosis.
In Development
🔄
Diagnose Condenser Fan
Guided condenser fan diagnosis will be available here. Repair the condenser fan system before returning to sealed system diagnostics.