No Heat - Upstairs System stopped working after duct cleaning yesterday. Observed that the flood protection switches were tripped and there was no water present. The flood protection switches have failed. Homeowner approved replacing both flood protection switches. After installing new switches I tested them both and they are both operating properly. Checked heat exchanger and tested equipment. System is operating properly at this time! Thank you for choosing T.E. Certified, have a great day and happy new year!