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hi i am dan i can help you with this. first there is a flame sensor in the bottom near the burner that probably just needs to be cleaned. are you able to remove the panels and access the burners?
ok it will be to the left of the gas valve pointing down into the burner. it is just a metal rod with a ceramic insulator around it and a single wire connected to it. remove it and clean it with a piece of sand paper or steel wool.
yes it will look like this
yes there should be 1 sometimes 2 screws holding it in
ok try to find the screw if not any little screw about that size should work as long as it holds tight. i would usually use a sheetmetal screw and then turn it back on and we will see if that fixed it.
did the flame ignight?
ok and the flame sensor is clean nice and shinny and reconected with the wire and installed above the burner?
ok then there are 2 posiblities, one is the flame sensor is bad or the wire coming off it to the control. the other is the control board is bad. it would require a meter that can read Ma to determine what is bad but if you would like to try fixing it i would start with replacing the flame sensor and make sure the wire is good. if it still doesnt work then the control is bad.
if you want to have a company fix it for you you can search for any HVAC or mechanical contractors around your area. or you can order the part yourself and replace it.
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