Obviously hooked up wrong, or the faucets are mismarked . Usually cold on the right, hot on the left.
cold water tub facuet is corroded bye hard water builtup and needs to be replaced. Hot water is okay. Its the right one with the cold water coming out
The shut off valve under the sink, the faucet itself, or most likely, the screen in the end of the spout is plugged. If neither hot or cold is coming out, it is kind of unlikely both shut off valves and both sides of the faucet would go bad at the same time. The screen being clogged would stop any water from coming out. The screen just unscrews out of the spout.
if it is a single lever faucet the cartridge needs to be replaced. check the supply valve under the sink first,
If you have an instantaneous hot water heater, and your faucet doesn't flow enough water it won't turn on the water heater. Thus requiring another faucet to be turned on.
Because you are using the Hot water faster than the boiler can produce it. Turn the tap/faucet off a bit. Get the proper sized boiler
I'm no plumber, but I would imagine that (if the hot faucet is giving you cold water) that the hot and cold pipes leading into the bathroom have been somehow switched.
cold water tub facuet is corroded bye hard water builtup and needs to be replaced. Hot water is okay. Its the right one with the cold water coming out
Odds are that the cold water lines to the faucet you are trying to use are shut off but the hot water lines coming from the water heater are not. That is why you have hot water but no cold water.
Yes
Assuming that you tuned the faucet to hot and let it run until the hot water should have reached it, you may want to check your water heater and make sure that it is working.
If water is only drawn from the cold faucet, then no, the water heater is not involved. However, if water is drawn from the hot faucet- even for a few seconds- hot water IS withdrawn from the heater, and fresh cold water drawn in to be heated- even if the hot water did not make it all the way through the pipe to the faucet- and the water heater will work to heat that fresh cold water.
true, the water is going to get hot either if you use cold or hot water You did not answer my question of if it was "true" or a "myth" that the water had to be from the cold water faucet. From what you did respond to it sounds as if the question I generated means it is a myth that the water "has" to be from the cold water facuet.
Kitchen faucet? If so, the sprayer attaches to the underside of the faucet in the middle.
Burn your tongue and throat is about the only issue. Hot faucet water is no different than cold water you heat on the stove or drink in your coffee.
You have a cross connection on a faucet somewhere in the house. That means the hot is overriding the cold because of a malfunctioning faucet. Usually happens at the tub/shower diverter if it is a single handle.
Possibly a cross connection
because there no backflow perventer on laves and toilets