On April 12, 2018, 2:00pm, Chester, a Certified Technician for Baker Brothers, Plumbing and Air Conditioning located at 2615 Big Town Blvd, Dallas TX 75150, made a service call for routine scheduled maintenance. Needless to say, the original service call was scheduled for a time of 9am CST, followed by another service call time change which was set for 12pm, (both times in the same day). To me being on time is everything. Being late is something I do have a problem with, most especially when you have other things planned, but not doing the job correctly and trying to sell the customer on services that one is under the assumption of needing to me is something I'm not willing to comprehend and is another thing all together, most especially when I as the customer before this routine visit was sitting in a residence with a room temperature of 72 degree's {Record Hi was 93 degrees, (weather.com/weather/mont…)}, only to be left with a room temperature of 78 degrees and climbing over a day and half to 90 degrees, where the entire house felt like the 10th Level of Hell. The house was hot and the air conditioning system was completely out of whack after Chester's (Certified Tech for Baker Brothers) left. However, before that, and after he completed his inspection of the upstairs and down the stairs units, he presented his findings by means of notes, invoices, and images. First, he stated that both units were in the process of going out, that the house still had the original units dating back to 2004, and that there was the possibility of an organic substance upstairs within the attic, and that it was advisable that I replace my entire ac unit soon before summer hit. As Chester was running through his sales pitch not one time did he ever make eye contact with me which I found disturbing. He then closed his pitch by stating that he could have his guys out to the residence in no time and that they had different financing options. Nothing personal right, just $10K to $18K and you wonder why I'm not smiling at this point. These numbers that I'm referring too were the figures that came off his invoices that he had prepared. I politely explained to him that of the 2 units that he said were both old and about to go, one of the units, the Concord, was replaced as of last year in 2017, while the other ac unit, which just needed minor repairs was the original unit, however parts that were necessary were replaced. He again proceeded to express the condition of my situation with regards to the AC Units, only for my rebuttal to be that I would need to sit down with my fiancé where we would both take time to go over the documentation that was left for are review. As I previously mentioned earlier within this acknowledgement, after Chester's departure, the temperature of the entire house began to gradually increase. At first, I didn't think of it to be an immediate problem because after his departure he turned the air back on or so I thought. I noticed that the temperature during his visit was still at the levels while he was performing his analysis. In response to this I adjusted the levels of both units back to where they originally were before Chester came and I activated all the ceiling fans in the house (Upstairs and Down Stairs). Later that day, around 7:45pm, the heat was still constant, not hot but I noticed that the temperature was different than before, but not as severe as the next day. On 4/13/18 at time of 9am it was still hot. It was also during this time that both units, upstairs and downstairs were still running. At this point I did find it to be a little questionable because that never happened with either one of the units before. At that point I still didn't know what was going on. When I made my way back to both thermostats I noticed that the temperature on the down the stairs unit had risen to 80 while the upstairs unit was 74. I again adjusted the temperature down to 74 and then left the house to run some errands. I thought that if I did this that the temperature would climb down to decent levels and that things would be back to normal, but I was again mistaken. Around 7:45pm, the temperature was now at 90. I also noticed that it was too late to call Baker Brothers. At this point I began to go back over everything that Chester had touched in order to make sure that nothing was left out of place. The first place that I went to was outside in order to check on both the AC units where upon my inspection I came across a BLACK HANDLE where bottom of the handle was composed of 2 copper prongs. This device or fuse was left on top of the outside boxes that links to the old unit while the 2nd box connects to the Concord. It was only after opening the 2nd box and doing 10 minutes of research that I began to realize what the function of this peace was. Power was immediately restored to the old unit after plugging this component back in. It took a day and half to fix their mess.