I am dealing with a Lennox EBVSTNM. I Replaced a high limit and the thermopile. It came on and stayed lit with just the burner plan in place. I re-installed the logs (per the mfgr log placement guide) and it will come on for a few minutes and shut off. the thermo pile is reading around 174mv, and the high limit is not opening. Is my problem in the gas valve circuitry? I don't want to throw parts at this thing. Thanks for the help and happy holidays.