Arrived to find system not heating but unit throwing any error codes. When jumped at the board unit worked, then jumped at the wall unit worked so thermostat was replaced. After installing the 824 unit began throwing a pressure switch error code and briefly continued acting erratic which suggest thr board has or is beginning to fail. This was explained to the customer and since were headed back out Thursday I'm putting the charge in an estimate and told him to pay on Thursday if he didn't have any further issues. Can confirm heat is running at this time