Termet Combustion Air / Venting Interaction

Furnace starts but shuts down when another large appliance (e.g., range hood) runs.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Insufficient combustion air, Negative pressure in mechanical room, Shared flue issues with Termet furnace, Blocked air intake

Safety: Combustion air problems can cause CO buildup. Use caution.

Check air intake: Ensure the Termet furnace air intake is not blocked and that the terminal is clear.
Room ventilation: If the furnace is in a small room, ensure there are adequate ventilation openings.
Avoid competing exhaust: Do not run powerful exhaust fans without providing make-up air.

Complex venting or combustion air issues should be evaluated by a qualified heating contractor familiar with Termet systems.

Hard 4/5