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There is a control board in blower compartment with 2 green lights and an ***** *****ght.Look and tell me what the lights are doing. (EX middle light flashing 2 times then pausing)
OK turn thermostat to call for heat and watch lights.If furnace fails to light the middle green should flash giving us an error code indicated by number of flashes between pauses.
Ok does the little inducer vent motor where vent attaches come on?
OK next does the ignite light?
OK if igniter glowed or sparked you would not know just based on not blowing warm I need you to verify each thing I ask 100 per cent to know how to guide you. You will need to listen for the little motor, then look in top panel to see if igniter glows or sparks. Not being rude, but I think so or pretty sure, will not allow me to help troubleshoot.
No problem hopefully we can get it figured out
OK the next thing that should happen is gas valve should open. Do you hear a click from the solenoid on the valve? Also do you have a multimeter to see if we are getting 24v to valve?