30 32 top and bottom panels 34 36 front and rear panels 38 40 and that together define a combustion chamber 42 portions of the ignition system 18 and burner 26 are positioned within the combustion chamber the valve 16 ignition system 18 blower 20 blower control module 22 and power source 29 are positioned within the plenum space 24 the ignition system 18 is configured to generate a pilot flame that is used to ignite a main flame of the burner 26 operation of the ignition system 18 is coordinated with opening and closing of features of the valves 16 to provide gas flow to the ignition system and to the burner for ignition of the pilot flame and the main burner flame typically the valve 16 receives electronic on off signals for operation of valve features that control fuel flow through the valve 16 the blower control module 22 monitors receipt of the on off control signals at the valve 16 when the blower control module 22 identifies receipt of an on control signal at the valve 16 the blower control module can initiate a sequence of controls related to on off control of the blower 20 likewise when the blower control module 22 identifies an off signal at the valve 16 the blower control module can initiate a further sequence of on off controls for the blower 20 in other embodiments one or more sensors may be used to detect the actual presence of a main burner flame at the burner or the presence of a pilot flame of the ignition system to determine the on off state of the heat generating features of the heating appliance an example monitoring and control system that describes the use.