The answer to 'heat exchanger short cycling' is that the heat exchanger in your HVAC system is turning on and off rapidly, a condition known as short cycling. This can be caused by several common issues, including a malfunctioning thermostat, a clogged air filter, or a problem with the heat exchanger itself. Short cycling wastes energy, puts strain on the system, and can lead to further damage if not addressed.
Some key symptoms of heat exchanger short cycling include the system turning on and off frequently, inconsistent temperatures in your home, and higher than normal energy bills. If you notice these issues, it's important to have a professional HVAC technician inspect the system to diagnose and repair the underlying cause. Trying to fix the problem yourself may do more harm than good, so it's generally best to call in an expert.