abced650

Dear Mystery man, I have fitted new ionization sensor but nothing wrong with old one..4ohms resistance in sensor and .4ohms resistance in the cable from it to the PCB board.I stuck the sensor right in the flame as well .Sensor get hots.(burnt fingers to prove it) Could it be anything else , eg, just an eprom or some part of rather than the whole PCB board? I am not a DIY person,I have a mechanical/technical background.I would appreciate further ideas on this.Thank you,