Common Winter Heating Equipment Issues

February 20, 2021

This year we are finding many issues occurring with NTI boilers and Navien Tankless water heaters, two commonly used brands.


Here are some frequent issue with NTI heating equipment:

1)     Boiler display showing an error code 6, “Flame Lock Out”. This error is caused by problems with the ignition sequence.

2)     Boiler display showing an ASC/ASO error code. This error means the Air Switch Closed or Air Switch Open, caused by age of the unit, calcium buildup, etc.


Here are some frequent issues with Navien heating equipment:

1)     Flow Sensor issue due to rusting

2)     Control board issues due to power or voltage fluctuations

Nothing says Canadian winter like a broken down boiler or furnace. Though many of your heating equipment units come with warranties, many of those warranties are only beneficial if your equipment has been maintained annually.

Maintenance will provide you with the safety checks and cleaning that your heating equipment needs in order to function at optimum levels during the harsh winter months.

Give us a call and one of our qualified technicians will be happy to diagnose your heating system issue. We offer NTI boiler repair and Navien water heater repair as well as new boiler installation and new water heater installation.

Whether you choose to repair the parts of your current NTI boiler or Navien water heater or you want to look into the popular & energy efficient brands we carry, Green Heating and Air Inc., will always ensure your seasonal needs.

Boiler and Furnace Repair, Replacement & Installation
Nothing is worse than having your boiler or your furnace breaking down on you. In the winter months, it can cause your pipes to freeze and break. Green Heating & Air provides you with fast, 24/7 emergency boiler and furnace repairs within the Toronto area.
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