The homeowner guide
Keep the symptoms, equipment history, and project goals together. Use independent guidance to compare recommendations without trying to repair hazardous equipment yourself.

Ask for an equipment-specific checklist and keep the service record. Clarify whether a maintenance visit includes repairs or whether additional approval is needed.
Compare maintenance and tune-up questions with the manufacturer’s instructions and independent advice.
Compare independent advice on equipment, installation, and seasonal care in ENERGY STAR’s heating and cooling guide.

Ask how the system will be sized, what installation work is included, and what the contractor has excluded. Compare controls, related work, permits, and service access as well as model numbers.
Read ENERGY STAR’s contractor-hiring checklist when organizing proposals, and explore our repair and replacement questions.
If you suspect carbon monoxide exposure, get outside to fresh air and call 911. A website form is not an emergency service. Follow official guidance rather than waiting for a reply.
The CPSC carbon monoxide information center explains alarms and exposure safety.
Do not handle refrigerant, open electrical service panels, modify fuel connections, or adjust equipment safety controls. Arrange appropriately qualified help.
Before installation or conversion work, contact the Oakland Construction and Code Enforcement for current project requirements. Confirm responsibilities in the written scope.
For independent guidance on pollution sources, ventilation, and filtration, visit the EPA indoor air quality resource center.
Your next step
Gather your equipment details, the symptoms you notice, and your project goals. Scope, pricing, and scheduling require direct confirmation.