Original service call was to address an issue with Google Nest thermostat. Bypassed thermostat and rollout switch to perform combustion analysis. Found CO PPM levels around 3000 plus and immediately shut down the analyzer. Gas valve was also clicking on and off repeatedly and flames were rolling out. Shut off gas and power to the unit and advised the homeowner that the system will need to be replaced due to the multiple failures which include breached heat exchanger, failing gas valve. A company representative will be coming out to the property today between 12:30-1:30 to provide replacement options and discuss different financing options that we offer. The diagnostic charge can be refunded with a signed proposal for a new system. Chud will also determine if vent pipes are correct. There still may be an issue with the Google Nest thermostat as the homeowner put new batteries in it and it still was showing a fault of “no power” even with a common wire hooked up. Carrier high efficie