hi,
the furnace that clicks and then doesnt light is a common problem for the ignitor control board being bad. it usually will try 3 times then stop trying. it might even once in a while almost light, then not. i have posted in another post about repairing my 3 furnaces. i put in the dinsosaur boards and they work great.
the one that doesnt do anything could be anyone of a number of problems.
i hope you can find time to come to mesa, az to visit us while you are here for a while. it isnt that far from yuma.
tom
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