Called customer to informed him that we are doing a heating maintenance on his gas furnace. Inspected his eco bee thermostat and found it to, be working at this visit. Gas pressures coming from to the unit was reading 3.15 WC. Amp draw off draft motor was .33, reading was .5 amps. Blower motor reading was .26 amp, no capacitor due to being ecm motor. Preformed leak search and found no leaks. Blower motor had no oil leaks and bearings were smooth. Did not see any signs of arching from the wires, more any loose connections. Was able to look at heat exchanger and found no issues with that part. Did notice that the supply and return ducts are dirty, and informed that the customer should get their ducts clean. Spoke to customer about water heater he takes care of himself.