Thanks to all the neighbors who made recommendations for HVAC services. We were able to get J & A Heating to come out immediately and fix our problem, even at the late hour. Below are all of your responses. Sarah Metro Heating and Cooling. We use J & A Heating. They’ve been awesome to work with. 412-885-5579 <(412)%20885-5579> bill Brody, Brody's Heating and Air We use Tedesco on Hampton. Very nice I've been using Wade Heating & Cooling for the last dozen years, and have been pretty happy. I do have to warn you that they're almost certain to be backed up ... but anybody else who's any good will be too. First cold snap of the season is crazy time for that trade. Paul Tedesco is my go-to heating guy and my neighbors, and neighbors across the street, and others. He lives in Highland Park and has taken very good care of me and my furnace needs. (412) 441-7747 Daryl Shawfield 724 339 0743 <(724)%20339-0743> Leave a message if they dont answer - Tell Him Debi From Highland park sent you Paul Tedesco of Tedesco Heating has done the annual service and inspection on my furnace for several years. He is also a Highland Park resident. We've used Day & Night HVAC - 412-488-3962 <(412)%20488-3962> and have always had positive experiences with them ... and their prices are exceptionally reasonable. I use Schulteis Brothers