You can make sure that the spark ignitor / flame sensor is positioned so that the part with the 90 degree bend is right in the blue flame. Its held on by a sheet metal screw and sometimes it can shift. Make sure that screw is tight. The burner is also held on by screws and can shift, but this is much less likely.
You can also disconnect the spark ignitor wire from the module and plug it back in to make sure the connection is solid.
Try those things first before letting anyone replace a DSI module $$$
Randy - Manhattan, Kansas
2015 Vista 27N
2016 Honda HR-V