Tested system not heating for the main level. Found that the control board has failed and not sending any power to the R terminal which supplies power to the thermostat. I bypass the board with the jumper wire in order to get the system on to test all other components. While testing everything we found other issues, including a single wall, flue pipe, extremely dirty ductwork, a failing blower capacitor, condensate pump that needs replacing, and no flood protections installed on the system. In order to bring the system up to a good condition we need to complete all of these repairs which it may make sense at this time to look at what the replacement cost would be. Based on our findings today, it might be time to think about getting a brand new system.