My brother hired a York dealer who installed a hybrid system for him (my brother heats on propane) and the company totally screwed my brother. His hybrid part never worked (the heat pump) and he was always heating on a gas. What a joke.
I've looked at a couple online contractor directories, but they want you to fill out forms and such. Where should homeowners go to look up companies along with their credentials?
Yelp is out - they filter reviews based on what companies pay them. Angies List says they don't charge, but they do. None of these are really truthful.