no hot water in shower but fine everywhere else
hi.
so I know NOTHING about plumbing. The water that comes from my shower is lukewarm at best. All the sinks and the other shower are fine so I figured it's not the hot water heater. I've looked online a bit and discovered it might be "debris" in the valve. However, I don't know exactly how to fix this. I've seen suggestions of: turn off valve (which I can do - I think), disassemble value and check for debris. I'm lost at the disassemble part. How do I do that? Water really won't come gushing out? Should I turn off all the water in the whole house?
is this even the right solution.
I noticed this to be a problem last winter but seemed to go away until recently again - or did I just not notice it because it. I'm a new homeowner with little cash and ambition to learn so can you help me do this myself or do I have to call a plumber?