Phase B diagnostic tool

HVAC Diagnostic Assistant

Technical Review RequiredAI-assisted content

Mandatory diagnostic disclaimer

This tool organizes observations into possible causes and confirmation tests. It does not provide a confirmed diagnosis, replace manufacturer information, or authorize unsafe operation, component replacement, or refrigerant adjustment.

Privacy

Do not enter customer-identifying information. Do not enter customer name, address, phone, email, payment details, or serial number.

Equipment typeEnter the measured or observed value; do not guess.RefrigerantEnter the measured or observed value; do not guess.Metering deviceEnter the measured or observed value; do not guess.Operating modeEnter the measured or observed value; do not guess.StagingEnter the measured or observed value; do not guess.Customer complaintEnter the measured or observed value; do not guess.Outdoor dry bulbEnter the measured or observed value; do not guess.Return dry bulbEnter the measured or observed value; do not guess.Indoor wet bulbEnter the measured or observed value; do not guess.Supply dry bulbEnter the measured or observed value; do not guess.Evaporator saturation temperatureEnter the measured or observed value; do not guess.Condensing saturation temperatureEnter the measured or observed value; do not guess.Suction-line temperatureEnter the measured or observed value; do not guess.Liquid-line temperatureEnter the measured or observed value; do not guess.Suction pressureEnter the measured or observed value; do not guess.Discharge pressureEnter the measured or observed value; do not guess.SuperheatEnter the measured or observed value; do not guess.SubcoolingEnter the measured or observed value; do not guess.Electrical readingsEnter the measured or observed value; do not guess.Motor/compressor nameplate readingsEnter the measured or observed value; do not guess.Return staticEnter the measured or observed value; do not guess.Supply staticEnter the measured or observed value; do not guess.Equipment maximum staticEnter the measured or observed value; do not guess.System observationsEnter the measured or observed value; do not guess.Stabilization timeEnter the measured or observed value; do not guess.Recent service historyEnter the measured or observed value; do not guess.