Dometic Furnace Vibrating

[bobekey6@gmail.com]

We have a 2020 17A, which we have thoroughly enjoyed and used quite a bit.
This fall the Dometic furnace has developed a slight vibration, which we hadn't experienced before. The furnace still goes on and off as it did before, and works.

The slight vibration can be felt on the counter and stove right above the furnace, and you can hear that the air flow is different.

I recently replaced the Suburban stovetop that had been recalled with the Dometic stovetop(a nice upgrade). I also have removed the intake cover and the outflow cover and there doesn't seem to be anything constricting air flow.

Has anyone experienced this and have a recommendation? Any ideas?
Thanks

[Iowa Dave]

Could be that the fan is no longer balanced for some reason.
Iowa Dave

[bobekey6@gmail.com]

To check that I'd need to pull the heater out. Is that a tough task. With the 2020 we have a large exterior opening. Am I right that I can pull the heater out there?
Many complications to checking this fan?

Thanks for all your help.