7. Ducted heater burners come on, but do not stay on | Burners keep going off
a. On classic natural draught flue appliances - the problem could be a gas valve or main control board.
b. If it's a fan forced flue type unit, and the burners come on but do not stay on for more than 5 seconds, the flame sensor could be dirty or a flame sensing circuit is bad.
c. On a high efficiency condensing heaters, it could be a ROLLOUT or a backfire signal due to a trapped condensateor a sediment build up in a heat exchanger.
All of the above can cause the heater to operate abnormally. This issues may require a professional assistance.
When professional assistance is required, we are ready to help. Contact REPAIR Heating & Cooling and our Technicians will identify and solve the problem for you.