Have a Brivis Buffaulo 85 ducted system (under house). Working fine, went away for a week, turned of the heating at the thermostat. Came home, and unit will not fire up.

Pilot light is on. Gas valve was replaced last winter. I have a spare electronic control unit (Tek321) which I fitted and still doesn't fire up. Replaced the thermostat and still no joy.

The weird thing is that the fan unit is constantly on. Its blowing cool air throught the house. I have the FAN and O/HS LED lights on the control unit.

Any ideas?


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