Besides Angies List- are there any other sites that recommend/do not recommend working people/companies? Any other online?
In my area, the Washington DC and surrounding suburbs in VA and MD, there is a consumer magazine and associated website that rates Heating and A/C contractors.
Like anything else, you still must do your due diligence and investigate. The Better Business Bureau and in my case, my County provides an on-line source to determine complaints made and resolution for all businesses within the County.
Your neighbors are usually the most reliable sorce there is.
I really should proofread....