PCSA 2022 Heating Check Up Prepaid Customer was a little concerned with a smell she noticed upstairs and in the laundry room. Most likely cause is trace amounts of CO coming from the ventless fireplace. Didn’t smell or detect signs of a gas leak. Customer is going to check with fire masters and make sure there are no issues. Replaced WiFi thermostat with sensi. Everything else was clean and checked out well. System is operating normally at this time.