Outdoor water spigot

Just purchased my home in January, and have recently run into an issue with the outdoor water spigot. I had frequently filled up the dog's water dish with the hose outside, watered the plants, etc. About a week ago, I went to fill the dog bowl and waited a minute because the water was hot. I assumed it was from sitting out in the sun, but then it got hotter. Ultimately the water got to the point of near-boiling hot, and I turned it off. Concerned, I . checked my sink inside, and showers to see if I had a similar issue, but no, it's just the outside spigot.

Ideas on what happened?

 

Welcome to the forums.

Has the spigot worked fine in the past and this is a new problem or have you never tried it before ?
It would be hard to figure what could possibly cause just that spigot to produce hot water only unless it was intentionally connected to the hot water supply.

 

It's possible the outdoor spigot is connected to your hot water lines and to the water heater... though it's frankly unlikely.

Are you sure it wasn't just really hot from sitting in the sun?

Can you follow the pipe in the basement and see how it's connected?

 

Is there a hose attached to the spigot? Sometimes the water coming out of my garden hose gets hotter the more you run - for the first few minutes. Sunlight can really heat up a hose, especially if it's a dark color hose.

 

If it used to provide cold water, and now it's hot, it could be one of several things, and I don't think we'll be able to tell by looking at our monitors.

I would look for a cross-over in a nearby single-handle fixture (with a hand on the cold pipe to see if it's getting hot) or a failed/missing check valve.