I have a bryant 394gaw02405 gas furnace calls for heat pilot lights but no main flame... pilot clicks/ignites but gas valve doesn't open replaced ignitor lh680005 last year worked all winter new season same problem help

Need to find out why the gas valve not opening, at the time it should be opening, is there power going to valve? You need a multi-meyer to find out,, are there any limit switches open,, some /most have a reset button on them ,sits right between where the wires connect,, let us know