Have HVAC Questions? Ask an HVAC Expert for Answers
Good Morning Coleen, I am Kevin one of the Tech's here on JA.
Can I get the model # ***** your furnace?
HI, it's Kevin from JA, I just got your message, reviewed your manual, and a code 4 2 does not exist. I don't know which direction to point you in at this time. I would have a technician come out and begin testing the circuitry, the original tech may be right, there may be something missing from the board, but I cannot be sure of this without doing some testing with a meter to actually see what is holding out the flame.
Everything I saw did not have a code 4 2. You got the furnace up and running now?