I have a trane XE1000 HP (Model #TWR0366100A3) that's been making a shut off banging noise for many years and the past HVAC guys simply said it was the compressor moving when it shuts off. A new HVAC guy came yesterday for maintenance and noticed the loud bang noise on shut off and says its the fan blade mount with 1/8" play in it when it starts and stops. I told him it's been doing the same noise for 6-7 years with no problems but he said fan could be it and come loose.
After he left I noticed the compressor seems to bounce around on the its mounts when I wiggle the HP unit. I thought the mounts and compressor should be solid to the floor but seems to be on flexible rubber feet allowing for this movement.
Now, is this normal for a flexible mounting like this for the compressor and do you agree with the possible fan issue?
Could it be the compressor pipes hitting as the unit moves on shut down and start up? I do not want to unnecessarily replace the fan blade for $when that is not the real issue.
Any immediate advice is appreciated!