The answer to 'my system upgrade keeps shutting off' is that there are several common causes, including overloaded circuits, improper installation, or issues with the new equipment. This can result in the system shutting off intermittently or not turning on at all.
Some key symptoms to look for are the system cycling on and off rapidly, tripping circuit breakers, or not providing adequate heating/cooling. Solutions may involve checking electrical connections, ensuring the new equipment is the right size and properly configured, or troubleshooting other system components.