Do you have any moen brand faucet in your home?
The first thing I would do is go to each single handle faucet, one at a time and turn the hot shut off, off under the sink and then flush the toilet to see if the hot water is there. Do this at each faucet one at time until there is no hot water at the toilet. When the hot water is not present at the toilet this will tell you which faucet cartridge is bad. You also want to shut the washing machine hot water off also, i have seen washing machine go bad and cause the water to mix.
I will try this and let you know if it worked!
Ok I will be here if we need to trouble shoot more.
Yes we have both a cirulating pump and it is on the timer. Both seem to be working but I am not sure if I would know if they were not!
Thanks so much,
I did this and the circulating pump appears to be working as expected. I am not sure what this was supposed to show? I still have the intermittent problem with hot water coming out the cold in some faucets and hot water in the toilet.