Before heating season, find the equipment manual and filter information, keep vents and equipment access clear, and schedule qualified pre-season service when appropriate. Do not open or repair gas, oil, electrical, or combustion components.
Prepare the information first
Record the equipment make, model, service history, filter size, and the name of a qualified service provider. Clear ordinary household storage away from access panels and follow manufacturer clearance and operating instructions rather than a generic diagram.
Use professional maintenance for the system
ENERGY STAR recommends annual pre-season check-ups and identifies gas or oil connections, burner combustion, heat exchangers, electrical connections, and controls as contractor maintenance items. Those items are not beginner maintenance tasks.
Know when to stop
If you smell gas, see damage, have an unfamiliar warning, or the equipment does not operate normally, follow your local utility and emergency guidance and contact qualified help. Do not repeatedly reset, bypass, or disassemble a heating appliance.
When to call a professional
Stop and contact a qualified professional if the work involves electrical wiring, gas, structural damage, roof access, major plumbing changes, mold, lead, asbestos, or another hazardous material.
Related guides
Sources
Affiliate disclosure
No affiliate links appear in this guide. If a reviewed recommendation is added, the disclosure will appear beside it.