Start with the concern and the equipment
Tell the technician about alarms, odors, operating changes and previous findings. A current CO alarm or suspected poisoning is an emergency, not a service appointment. After the home has been cleared, professional follow-up can investigate equipment-related causes.
Measurements need context
Depending on the equipment and agreed scope, evaluation may include inspection of combustion air and venting, draft checks, combustion measurements and checks of relevant operating conditions. The technician should explain the instruments used, where readings were taken and which manufacturer requirements apply.
A reading is part of the evidence
Conditions can change as equipment and exhaust devices operate. A low CO reading at one moment does not establish that a damaged heat exchanger is acceptable for use. Some concerns require further inspection or additional investigation.
Ask for a documented explanation
Ask what was confirmed, what remains uncertain and which corrective steps are needed before equipment operates again. Confirm the testing scope and documentation when arranging the visit. Routine maintenance and a focused combustion investigation are not necessarily the same service.
Planning a non-emergency visit?
These service options are for routine evaluation or follow-up after emergency responders have cleared the home.
