How do I choose a professional for maintenance & prevention?
Choose a properly qualified and insured professional whose written scope identifies diagnosis, permits, parts, labour, exclusions, warranty, cleanup, and total price.
What this means
Maintenance & prevention covers filters, alarms, seasonal work, recurring checks, and planning. Relevant observations include When should I change the furnace filter?, How often should alarms be tested?, What should I check before winter?, What should I check each spring?, I need a complete maintenance plan. The correct response depends on age, design, climate, usage, installation, recent work, and the exact manufacturer instructions; these observations narrow next steps but do not prove a failed part.
Safe checks
- Verify the licence or certification required locally for work on maintenance & prevention.
- Compare at least two written scopes when the situation is not an emergency.
- Confirm insurance, permits, parts, labour, warranty, exclusions, cleanup, payment schedule, and change-order rules.
Stop and get help if
- Leave or isolate the area for fire, gas, carbon monoxide, electrical exposure, collapse, sewage, or rapidly spreading water.
- Get qualified assessment when a hidden, growing, recurring, or structural condition is suspected.
Which professional to call
Use a qualified qualified maintenance professional when the condition exceeds safe user access or the visible checks do not explain it.
Find the relevant tradeSource and method
This answer combines HomeSOS's structured triage with safety boundaries supported by a public source. It does not replace inspection.
Health Canada: Home safetyReviewed August 12, 2026