Notice the signs
Observe
Record the model and serial label, fuel or power, tank or tankless type, age if documented, error display, temperature at representative fixtures, recovery pattern, wait time, recent work, and the first wet point.
Note 39
Place the condition before choosing the work
Protect the room
Safety line
Stay away from gas odor, combustion concerns, hot relief discharge, wet electrical equipment, and leaking vessels. Do not open panels, relight, bypass a safety, or test the relief valve for diagnosis.
Material note
Local boundary
Cohasset plumbing, gas, electrical, and inspection paths can differ by the work proposed. The permit authority and licensed trades should define their own requirements before equipment is changed.
Service flow
Written scope
Ask the estimate to distinguish controls, heating components, venting, combustion air, gas or electrical supply, tank, valves, expansion control, drain, distribution, access, permits, disposal, and commissioning.
Close the loop
Verification
Verify stable operation through a realistic recovery cycle, fixture temperature checks, dry connections, error-free controls, safe discharge routing, and delivery at representative outlets. Preserve settings and maintenance instructions.
Current primary source