Heat stopped working on a 10 year Weil McLain CGA Gold Came within 2 hours of initial call, but by that time the heat started working again. Technician spent 1 hour trying to find a problem but thought it worked. Charge was $200 w/ tax but was after hours. Stopped working again a week later. Appeared to be a faulty damper. Charge was $400 w/ tax. Technician called an hour before coming and came on time. 2 days later, heat stopped working again. Came within 1 hour of the call. Was a faulty sensor which technician replaced. Did not charge for visit. Very fair, very responsive. Technicians are professional and owner is a pleasure to deal with. Would have been great for problem to be found on first time, but life doesn't work that way sometimes. Plus, there were multiple issues which make it more difficult to diagnose. Would absolutely use them again. I can't imagine how much more difficult it would have been had I needed to wait 2 days between each appointment as PSEG usually requires.