Unit blower runs when the thermostat is turned to a heat setting but the heat never comes on. Furnace did get wet in late spring (in a crawl space). All electric to unit is on, it also gets used a whole-house fan in summer at times. I don't have any paperwork on unit because it was in the house at purchase. Can I still get parts if they are needed? All I can think of is that the igniter went bad and I don't even know how to repace/find it!

Some of the parts might still be available but you will need the number off the part for a match up. If the furnace got wet I suggest having a professional HVAC person look it over since many different problems can surface especially since it was flooded especially electrical problems. It would also be a good idea to have the heat exchanger tested if gas or oil operated.