I'm trying to repair a leaky single handle shower/tub faucet assembly. I can't see any markings on it, so I don't know the brand. It's a lever type handle that rotates to turn off and on.

I've removed the set screw from the handle, but the handle won't come off to allow me to get to the cartridge. Have tried a heat gun, but that didn't work. Would appreciate suggestions as to how to get the handle off without damaging the plumbing.

As an alternative, I was wondering if I could cut the handle off and replace the entire handle & cartridge with a new faucet?