Your HVAC filter should be located under the hood, on the right side of the vehicle, and against the firewall. I believe the W900s all use the same cab filter as the T600 and T660, so it'll be encased in a plastic cover which is hinged at the top and held in at the bottom with a rubber strap. There's no need to replace it if it isn't damaged - it can simply be washed out and reused.
blowing things up.
there must be no air blowing
Is it blowing cold air only or not blowing any air at all.
You ain't dead from it blowing up , that's how..
The AC isn't working.
If it's a working vehicle, whether plated as a farm vehicle or commercial vehicle, no.
The fan is not working.
by working,running businesses and blowing up atm's.
you have a vac. leake or the oneway check valve is not working.....
Cindy Jenkins has written: 'Beads of glass' -- subject(s): Glass artists, Glass beads, Glass blowing and working, Technique 'Making glass beads' -- subject(s): Glass beads, Glass blowing and working
Jammed blend door or blockage in the ducts if you mean to say air isn't blowing through at all.
Your heating coils are most likely clogged.