Diagnose heater, delivery, and temperature separately

DECISION GUIDE 31

Make the next action fit the evidence

Use the condition described here to narrow the first safe action, the responsible contact, and the written authorization.

Do not pay for certainty that the observable pattern does not support.

OBSERVE

Preserve the useful clues

Record model and serial labels, age if documented, fuel or power, error code, water location, affected fixtures, temperature behavior, and recent service.

Write the time, fixture, room, and use that preceded the change.
Photograph the wider context before taking a detail view.
Keep model labels, bills, prior repair records, and test results together.

CONTAIN

Choose the safe boundary

Keep away from gas odor, combustion concerns, hot discharge, wet electrical components, and leaking tanks. Use emergency or utility guidance when those hazards apply.

Containment should reduce harm without erasing evidence or transferring risk to gas, electricity, wastewater, finishes, or utility equipment.

AUTHORIZE

Put the first scope in writing

Separate diagnosis, component repair, tank replacement, gas or electrical work, venting, drain pan, expansion control, permits, testing, haul-away, and instructions.

Ask what is included, excluded, and still unknown.
Set the price or authorization boundary before work expands.
Define the test or record that will show completion.

SANTA ROSA SOURCE

Check the current public guidance

CPSC tap-water scald guidance

CPSC explains residential tap-water scald risk and temperature precautions.

Before the visit Preserve the pattern and clear only safe access.
At diagnosis Ask what observation or measurement supports the conclusion.
Before repair Verify the legal provider and compare the complete written scope.
At closeout Review tests, remaining limits, permits, cleanup, and documents.