Anthony — TSSA-Certified G1 Gas Technician
TSSA G1 licence #TBD · 15+ years in gas and mechanical trades · Service area: Greater Toronto Area, Ontario
Last updated: 2026-08-03
Is a landlord responsible for a red-tagged furnace or water heater?
Generally, yes. Under the Residential Tenancies Act, 2006, and municipal property standards bylaws that apply across Ontario including the Greater Toronto Area, landlords have a duty to maintain a rental unit in a good state of repair and to keep vital services — heat is explicitly one of them — functioning. A red tag that shuts off a furnace removes a vital service, and that generally puts the obligation to correct it on the landlord, not the tenant, regardless of who called the gas company or found the tag.
This is general information about how these obligations typically work, not legal advice for a specific tenancy. Landlords and tenants with a dispute should consult a paralegal, lawyer, or the Landlord and Tenant Board directly.
How fast does heat need to be restored?
There is no single province-wide number of days written into the Residential Tenancies Act for this specific situation, but municipal property standards bylaws in most Ontario municipalities, including Greater Toronto Area municipalities, treat lack of heat as an urgent matter requiring prompt action, often measured in a small number of days rather than weeks, especially during the heating season. A landlord who is aware of a red tag and does not act promptly to arrange correction by a certified gas technician risks a maintenance complaint to the municipality or an application to the Landlord and Tenant Board.
In practice, prompt generally means contacting a certified gas technician the same day or the next business day after learning of the tag, since delay compounds both the tenant's hardship and the landlord's exposure if a complaint is filed.
What can a tenant do if a landlord isn't acting?
A tenant without heat or hot water due to an unaddressed red tag generally has a few paths available in Ontario, though which is appropriate depends on the specifics of the situation.
- Notify the landlord in writing of the red tag and the lack of heat or hot water, keeping a copy
- Contact municipal bylaw or property standards if the landlord does not respond promptly, since heat is typically covered under local property standards bylaws
- Apply to the Landlord and Tenant Board for a remedy if the issue continues, which can include an order for repair or a rent abatement
- Keep all documentation — photos of the tag, dates of contact with the landlord, and any technician correspondence
Who is responsible if the appliance is a rental unit, like a rented water heater?
Ownership of the appliance itself and responsibility for the rental unit's habitability are separate questions. If the water heater is rented from a utility or third-party provider, that company is generally responsible for defects in the tank itself under the rental agreement. But the landlord, as the party responsible for the rental property, is still generally responsible for making sure the unit has hot water restored promptly, which may mean coordinating with the rental company or a certified gas technician on the venting or piping side, since red tags on rented tanks are frequently caused by venting issues rather than the tank itself.
What documentation should a landlord keep after clearing a tag?
Keeping clear records protects a landlord if a tenant complaint or a future sale raises the issue again. This documentation is also generally useful evidence of a landlord meeting their maintenance obligations promptly.
- Date the tag was discovered and how the landlord was notified
- Date a certified gas technician was contacted
- Invoice and written confirmation of the defect and the correction performed
- Confirmation the appliance passed inspection and the tag was cleared
- Any communication with the tenant about timelines and temporary arrangements
Can a landlord pass the repair cost to the tenant?
Generally no, unless the defect was caused by tenant damage or negligence, which is a fact-specific question. Ordinary wear, aging equipment, or a venting condition unrelated to tenant conduct is typically a landlord maintenance cost, not something that can be charged back to rent. Any attempt to withhold maintenance or shift cost to the tenant in a way that delays restoring heat can itself become a maintenance standards issue. This is general guidance, and specific disputes should go through the Landlord and Tenant Board or legal counsel.
Frequently asked questions
Is heat considered a vital service in an Ontario rental?
Yes, heat is generally treated as a vital service under Ontario's Residential Tenancies Act and municipal property standards bylaws, meaning a landlord is generally required to maintain it and act promptly if it is interrupted, such as by a red tag on a furnace.
Can a landlord be fined for a red tag left unaddressed?
Municipal property standards enforcement can result in orders or fines if a landlord fails to maintain vital services like heat after being notified. Tenants can also apply to the Landlord and Tenant Board for remedies including rent abatement in cases of prolonged loss of service.
Who pays to clear a red tag in a rental property — landlord or tenant?
Generally the landlord, since maintaining the property's mechanical systems and vital services is a landlord responsibility under Ontario law, unless the defect was directly caused by tenant damage or misuse, which is a fact-specific determination.
Is this page legal advice for my specific tenancy situation?
No. This is general information about how landlord obligations for heat and vital services typically work in Ontario. Specific disputes should be directed to the Landlord and Tenant Board, a paralegal, or a lawyer.