01
Cold baseline
Note ordinary cold flow at the affected fixture before describing a pressure loss.
Sheet 19 / Diagnostic set
Compare sides without opening the heating system
Compare hot and cold flow without opening water-heating equipment.
A hot-side change with normal cold flow is a different inspection branch from low flow on both sides. Record both at a few fixtures while leaving equipment covers and fuel or electrical components alone.
Call about the symptom877-702-1610
INPUTOBSERVETRACEVERIFYOUTPUTRECORD
S-01Symptom named
S-02Access mapped
S-03Provider unverified
S-04Scope pending
Identify the symptom
Five callouts for this drawing
Each note describes an action, not a diagnosis. Leave unsupported branches open.
02
Hot baseline
Separate weak hot flow from adequate flow that lacks expected temperature.
03
Fixture spread
Check a limited representative group instead of running every outlet.
04
Equipment exterior
Record only visible lights, codes, labels, or moisture from a safe position.
05
Recent event
Add service, outage, vacancy, or control changes to the drawing.
Trace the source
Follow evidence through the branch
Add the last normal use, fixture spread, visible equipment display, recent outage or service, and simultaneous demand. Stop comparisons that create unsafe temperature or water movement.
Repair route and access map
Define the boundary before authorization
Retain the locations checked, readings explained by the provider, component or system finding, completed work, and fixtures or equipment left outside scope.