Field Rules · Core Field Rules

Callback Prevention & Verification

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The verification routines and common mistakes that separate a finished job from a callback.

Callbacks come from unverified work. The fix is a verification routine you run on every job — prove the fault, prove the repair, and re-check what you disturbed.

Verification routine

Prove the fault before you repair.
Prove the repair before you leave (readings back in range).
Re-check any fitting you disturbed.
Re-check access points after reinstating.
Record the readings on the job sheet.

Common callback causes

Resetting a safety without finding the cause.
Topping up refrigerant without finding the leak.
Leaving a service valve in the wrong position.
Disturbing an access fitting and not rechecking it.
Not evacuating properly after opening the system.
Setting controls from memory.
Guessing a leak location from the oil stain.

Field Rules

01
"A job isn't finished until the readings are recorded and back in range."

Cross-references

The Field Rules Commissioning Evacuation & Micron Diagnosis Rotalock & Pressure-Path Diagnosis Leak Diagnosis — Find It, Prove It, Clean It