I had some difficulty getting advice and starting work with a contractor to replace an aging water heater in a simple hydronic system. I received either misinformation, excessive quotes or faced a genuine lack of interest and follow-up. In the end, two companies were responsive.
In the case of the Heating Specialist, I was confident they understood my system- they claimed to have installed it for the original builder. However their quote was excessive. A fixed price quote, I could never get a clear answer on what the approximate labor hours would be and I believe I received misinformation on the scope of the job. After I objected to the lack of detail- they decided to not follow-up further.
Fortunately I eventually received two very professional quotes, and was able to successfully move forward.