Upon arrival downstairs unit operational. Client concerned with noise and little heat. Adjusted blower speed, removed old filter from grille and removed foil blocking airflow from register. Noise and system performance improved. Adjusted settings in tstats from natural gas to propane. Upstairs unit not operational. Blower cycles. Inducer comes in sometimes, but unit never lights. Tstat showing pressure switch error. Tried jumping out pressure switch. No change. Per Matt ordering control board. Scheduled for a technician to come out Monday to try talking with tech support.