Blodgett oven diagram of ignition module and related parts.
Tip: In the event that the intermittent ignition will not light check the following.
1) Check igniter for broken coil, also check for break or short in igniter wire leads.
2) Examine ceramic wire nuts for good connection on igniter wires.
3) Check thermal delay for proper operation.
4) Check solenoid valve for proper operation. Replace if necessary.