Furnace seems to have lost air volume and heat

[JBHarper]

We recently purchased a 2017 Reflection 337RLS. On our trip home we have had lots of occasions to use the furnace. It seemed to be working fine this morning. Now the volume of air is significantly reduced and the air temperature is also significantly lower. Any thoughts on what might be happening?

[FT4NOW]

I would start by looking at the ducting coming out of the furnace and anywhere else you can see it. It either could have fallen off somewhere or developed a hole.

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