The heater is making so much noise

During the past three days the A/C has not been working and the temperature outside has been horrendously hot! News has reported people fainting from the heat! Inside my house everyone has resorted to being dressed with a little clothing as possible along with sitting in front of fans trying to stay cool. This Air Conditioner and Heater unit really needs to be fixed! We called the HVAC company and the technicians were backed up. It seems that everyone had difficulties with their A/C units. It was going to be two days before anyone could come to the house and take a look at our A/C system. Luckily, we caught a break when the weather changed and things cooled off slightly. The weather changing allowed us to open our windows and place fans in front of the windows to pull in the cooler temperatures. I was so thankful that we had fans and that we had plenty of ice to make cold drinks while waiting for the A/C repairman to come and take a look at our unit. I am going to ask them to go ahead and replace the Air Conditioner and Heater unit before the summer gets here. If the past three days is any indication of how miserable things could be, then I want to take away any risk of that occurring this summer. I already spoke to the local HVAC company and scheduled an appointment for the A/C technician to come out and give me an estimate on how much a new Air Conditioner and Heater system will cost.