rattling air conditioner

be careful, the seal might have flattened out and if you tighten it it may cause it to leak

I doesn't sound like the whole unit is rattling just maybe the compressor.

The hold down bolts secure the whole A/C unit to the roof.
Remove the complete ceiling grill. 4 corner bolts......they should just be 'snug' (40-50 INCH LBS----not foot lbs). The roof gasket should only be compressed to one-half of original thickness. Gaskets are roughly 1" thick so don't compress more than 1/2". Over compression can cause roof leaks AND can block evap coil drip pan drain holes....condensation from evap coil can then be pulled over into discharge plenum and leak into inside of rig.

Compressor rattling..then you will need to go on roof and remove shroud and check what is loose inside the A/C unit.

It could be the shroud. They get brittle and then break. I see them along the interstate all the time. If you look real good between Ohio and Tenn., you may find mine as all I had left were four small pieces under the screws that hold it in place. just a thought.

The AC on our Pleasureway excel TS is very noisy with clunking
sound. Normal?

Could the compressor make this clunking noise ?

Our AC had a defect from the factory. The bolts holding the motor to the compressor were loose from the time we bought the new PW Excel 2006. It was always noisy and finally started chattering really bad. I had a shop look at it and they found the problem and fixed it.