Need a little help

Today I dropped the furnace off at the dealers shop and left it with them for a few hours to have it checked out. When I returned they had checked the entire unit out and did not find anything wrong. They ran the unit through it's cycle while I was there and it performed great. I brought it back and reinstalled it in our unit and replaced the crimped wire connections with wire nuts and we now have a working furnace. So I don't know if their checking and unplugging and reconnecting connectors or my eliminating the crimp connectors repaired the issue or not but we now have heat and are happy campers! In any case the more I mess with our rolling home the more I am learning about it which will help while we are on the road. Thanks to all for your help! This sure is more fun than bricks and sticks :-)