I have the same problem with my Lennox G20 Johnson Control ignition control board as mentioned in the Dec 2001 post. Like previously mentioned, if I turn off the electric for awhile then the pilot may come back on.
My unit is 4 years old. Is this part covered under warranty by Lennox since the Johnson Control is a defective part?
Also, if this part is not covered by the warranty from Lennox then did you buy directly from Lennox for the replacement Johnson Control part (Honeywell conversion kit) or from which website?