During any service-related call or when gas is turned on, a certified gas technician must inspect the natural gas equipment. This is to ensure it is installed as per the Natural Gas and Propane Installation Code, the manufacturer’s certified instructions, and that the equipment is operating safely.If your equipment is no longer safe to operate or it needs to be repaired or replaced, a warning tag is placed on the natural gas appliance or piping by the certified gas technician. They are required, by law, to issue the warning tag as a safety measure to protect the residents of your home or business.
Two Types of Warning Tags: A and B
If a warning tag is issued, the certified gas technician will provide both verbal and written notification of the infraction to the customer.
- An “A” tag is issued when the appliance or work creates an immediate hazard. As a result, the supply of gas to the appliance or building is shut off. Common examples include a cracked heat exchanger (that cannot be repaired) and improper ignition.
- A “B” tag is issued when the appliance or work does not create an immediate hazard. The customer is provided a limited time frame for repairs or replacement. If corrective action is not taken, the natural gas supply will be shut off. Common examples include improper clearance to combustibles and insufficient pipe supports.
Why have I received a warning tag?
Warning tags are issued on any appliance and piping system that uses natural gas when a licensed gas technician has identified a hazardous issue. One reason for a warning tag to be placed on a furnace is when a defective heat exchanger is identified. A defective heat exchanger can be a hazard because it can produce carbon monoxide; an odorless and colorless gas that can cause serious health problems if undetected. Carbon monoxide is harmful because it can rapidly accumulate in the blood, depleting the blood’s ability to carry oxygen.
If the contracting company and technician did not adequately explain or show their findings in issuing a tag, sometimes it’s best to get a second opinion. Learn more about second opinions from our Service Manager, Chris Martin
Martino HVAC serves the GTA along with Durham, Halton, Peel, York, and Quinte & Kawartha regions. We provide reliable heating and cooling installation and repair to residential, commercial and industrial customers.