Customer was noticing a loud rattling sound coming from the furnace. Furnace was operating normally upon arrival. Cleared drain lines to make sure nothing was stuck inside the line. Capacitor on blower motor is getting weak. And bearings for inducer and blower motor are both getting worn and causing some play in the motor shafts. Either one could be the cause of the issue but nothing noticeable happened during the inspection. Recommend customer watches furnace and try to record sound to help narrow down issue. System is operating normally at this time. 1/8/24 Returned after customer was able to record the furnace making noise but was not able to get it to occur while under observation. Most likely cause of the issue is the inducer assembly. The library board is going to vote on whether repairs are needed or if a new system is a better option. To replace the inducer motor and blower capacitor, the price given was $942 (including service call). If the blower or inducer motor should fail