Issues with water heater (silt and brown water). Contacted ASTAR with this plumbing issue asking that a plumber be sent out. Sent HVAC tech who was not knowledgeable about this issue, although this is not to disparage the tech as he may be wonderful for HVAC. My husband told him he thought we needed new anodes but was not sure. Tech left and placed order for anodes. When the anodes came in, we received call with installation date and time - Tues 04/26/22, 12:00PM-5:00PM. Kept the afternoon free for the tech by scheduling an app for that morning. Monday the 25th, call from the original HVAC tech stating he would be here on the next day. I asked why they were not sending a plumber. Said he was trained in plumbing also, but I questioned why he could not diagnose the problem when he was here, and that I would like a plumber. Said ok, he'd let them know. My husband called later that same day with a question, and confirmed the time, 12:00-5:00. The following day, I was on my way out the door for a 10:00 app when my husband forwarded to me a text stating the tech was on his way. I called the office and reminded them that our app was for the afternoon and I was on my way to an app. Sorry, but he needs 3 hrs for the replacement of the anode so needs to come now. I reiterated that I was on my way to a 10:00 app and he needed to come at the stated and confirmed time. Again, sorry but he must come now and did not know why we were not informed. We could reschedule for next week. NO! I rearranged my day to accommodate them and I expected them there no earlier than 11:30, at which time I was sure I'd be back home. Put me on hold and another women answered who I believe was a supervisor. No idea I was being transferred. Explained again and was greeted with a condescending and patronizing attitude....I apologize for the inconvenience but he must come now, not at 11:30 or 12:00-5:00. No concern for the fact that we were never informed of their change in time, or that I would scheduled an app't that I now needed to cancel just minutes before my arrival time. In the long run, I was forced to cancel my app't in order to have the silty, brown water corrected as we'd been living with it for several weeks already. The plumber was very knowledgeable and professional, taking care of the problem. He spent time testing the water and filling the tub mid-way in order to visually see the problem (something the HVAC tech did not do. He merely ran an inch or so of water and said it was not happening for him, which wasn't true since I'd informed him that it happens when the tub is filled quickly to capacity, not just an inch or 2). Noah also called the mfg of the water heater in order to help diagnose the problem. No other issue with the water so far, but we will see as time goes by since our total bill was for well over $800. Noah is the only reason I am giving 3 stars. I also do not blame the original HVAC tech for not knowing how to diagnose as this was not his area of expertise, although I was still charged the $200 plus tax for a diagnosis. The office supervisor/manager was unprofessional; uncaring; patronizing, rather than making it right. For that reason alone, I would not recommend this company. Also, if you are having a plumbing issue, be sure to insist upon, and verify that you will have an actual plumber, not an HVAC tech.