Didn't have a chance to troubleshoot which item was bad but as another reviewer mentioned, the cost of all three was reasonable enough and I just replaced them all.
Took me about one hour start to finish including pulling dryer out of its closet location.
This is the third time since owning the dryer for 12 years I have taken it apart. I find it much easier taking everything off from the top down. Removing the drum allows free and unhindered access to the components in question. Ran a repair in February to replace a thermistor when we were noticing low heat symptoms. During that repair I had vacuumed all of the built-up lint inside the dryer so this time there was nothing really to clean out. Highly recommend cleaning out lint from dryer and the exhaust tube as well. Helps in the efficiency of it all.
After replacing all parts in the "Low or no Heat" recommended list with exception of the humidity bar the dryer is working correctly with full heat needed to dry clothes quickly.