The pressure switch could be the issue, but the most likely issue is the fluid, so we need to start there.
Let's check the fluid and find out if that is full and in good condition.
If it is, then we need to move onto check the line pressure to find out what the next steps are.
You can try and replace the switch but at this point that would be a guess so I would suggest running through this material and let us know what you find.
Please let me know if you have questions and we can go from there.
Images (Click to enlarge)
Wednesday, December 22nd, 2021 AT 7:34 AM