I woke up last week, and when I tried to switch on the multi-split air conditioning system, it would not turn on. I wondered what the problem was. The air conditioning company told me they would send an a/c serviceman three days later as they were fully booked. It was mid-summer, and the HVAC companies were hectic doing various jobs, including HVAC installations. I went online to get information on what the issue would have been, but I still needed help to figure it out. The unit came on when I was about to give up and put myself in a hotel. I thought not to switch it off lest it not come back on. The unit was on for three days. When the air conditioning technicians finally showed up, they immediately assessed the unit through the HVAC maintenance and replaced a couple of worn-out parts. When they installed new filters to improve the air quality, the head engineer came to me and let me know the issue. The thermostat was shot, circuiting the quality air conditioner. I inquired for more information on how that would be possible, and the workman knew more about air conditioning than I explained. Quality HVAC equipment spends a good amount of energy simply turning on and off. However, the right thing is to let the unit run for at least 15 minutes before shutting off. There are numerous types of regulators in the cooling industry, but I chose a wireless one from the air conditioning provider’s store. It was also quite affordable. The workman advised that whenever a technician tuned up the unit or did any air conditioning repairs, he should check on the regulator to ensure it was functioning optimally.