Remove the faucet s bonnet nut.
Delta sink faucet bonnet nut stuck.
Apply heat to the stuck fixture or.
Here are some nut freeing tricks from richard trethewey.
Put a wrench on the fixture or nut and strike the handle sharply with a hammer to loosen the fixture.
If the fixture or nut hasn t loosened go to step 2.
Any time you replace an old faucet you have to take off the locking nut that holds the faucet tight to the countertop.
Sometimes you need a hammer to break the nut.
The easy way to access a corroded basin faucet fixing nut for removal.
To remove the bonnet nut turn it in a counterclockwise direction with a wrench until the nut is free from the threads on the valve then lift the nut up and over the valve to complete the removal process.
The stroke by billy squier permission to use in this video by the legend hims.
Make sure that the surrounding area is free of any valuable items as the action to strike the motion against the plumbing nut.
Removing a stuck on bonnet nut when changing a cartridge on the delta shower valve.