The clear answer

Follow the furnace manufacturer’s maintenance instructions and arrange qualified servicing appropriate to the system. Ask what inspection, cleaning and operating checks are included; a filter change alone does not describe a full furnace service.

Be specific about the appointment

Ask the provider to describe the maintenance scope and charges before booking. Tell them the fuel type, model if accessible, recent symptoms and the last service date. Share any warranty requirements so the appointment and records can address them.

If the furnace is already failing, explain that when requesting service. A routine maintenance appointment may not include the diagnosis, parts or time needed for a repair.

Keep a simple heating record

Record the model and serial number, installation date if known, service dates, work completed and warranties. This can make future diagnosis and replacement planning more informed.

Ask the technician to explain the appropriate filter type and replacement schedule for your equipment. A more restrictive filter is not automatically a better fit; airflow compatibility matters. Do not alter gas, electrical, venting or safety components yourself.

Plan before the heating season

Confirm appointment availability in advance and discuss access to the equipment. If the property is rented, managed by a strata or used seasonally, arrange the responsible contact and access instructions. No maintenance visit can guarantee that equipment will never fail, so keep the contractor’s contact and emergency information accessible.

Before you agree to the work

  • Manufacturer service requirements
  • A written list of included checks
  • Compatible filter guidance
  • A dated service record

Sources & further reading

Prepared by the BC Furnace Repair editorial team using the official sources linked above. Reviewed November 5, 2026. General planning information; a qualified contractor must assess the equipment and property.