Performed furnace diagnostic, found furnace on at tstat but not running outside at the package unit. Removed panels to look for error code, found error code 23 or 32 it’s a pressure switch error code. System had locked it self out. Reset unit, checked inducer capacitor 1@1 ok, checked motor is getting power, then tested system, system running at this time. Inspected pressure switch tubing ok for now. Tested system forcing it to turn off and on. System running for now. Something might have blocked tubing clear for now. If problem consists, might have to change pressure switch. Ran house temperature up from 69 to 72 degrees. Recommend resigning up for another year of maintenance. Resigned maintenance plan, and client at doctors office will call in credit card when she gets on 3pm today.