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Furnace noise
We have a 09 3605RL and recently have started using the furnace. The furnace starts and runs properly, with the exception of a bang that occurs about 2 min into the operation. The fan starts and then ignition and about 1-2 min later there is a "bang" that sounds like someone has hit the bottom of a #3 washtub with a wooden spoon. I contacted the selling dealer and he told me that he was "2weeks out" in schedule and that any dealer could work with the Suburban furnace. Upon contacting a closer dealer, the service person listened to me and told me that what he thought the sound could be was something to do with the ducting heating and expanding, and that if that was the case, that Suburban wouldn't cover repairs under warranty. I must add that neither dealer actually heard the noise because we didn't take the monty to them to diagnose.
Has anyone else had this noise and if so, what was the corrective action. Thanks in advance.
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