I have early 1990’s Rheem furnace in the new house I moved to this year. It worked OK until today. The unit’s induction fan comes on, hot plate lights up, but the unit doesn’t turn the gas on. Checked the units 24V is OK, both over temperature sensors have continuity, but the valve solenoid is not getting energized. I need advice to point if this is faulty control board or it still could be the hot ignition (since the blue wire goes from board to the hot plate ignition unit and also to the valve solenoid). I do not have a technician I can trust here yet (Orland Park IL) so would really appreciate help.