Mandy - is your hav peeing in the same spot on the carpet? or is the place random as well?
Don't feel bad, every winter my little menace to society, decides it's too cold to go outside to do his business, and even though I have a puppy pad down for him, by the door to the backyard, he'll be lazy, and resume an old puppy habit and pee on the bathmat in my bathroom, 10 doggie steps from my bedroom. last week, I didn't have anything on the floor in the bathroom, thinking that it would deter him, and nope, he still pee'd there, on the tile. bogger!!!!
Does my little igit know better? of course, if I was standing over him, would he still do it? hell no. but it's in the middle of the night this stuff happens. sigh.
I'd just not give your dog access to where he likes to pee in the house.