I have a Firebird-S 50-90 ... He works all the time very well but now he suddenly stop, and the red RESET button is red. But when I press the reset button then the burner starts but after 3 - 5 sec. switch the burner again off and this all the time... I did clean everything but no chance

Oliver, November 2015

http://www.justanswer.com/hvac/1t0ye-boiler-firebird-s-50-90-when-switch.html#re.v/326/

XXXXX, November 2015