The red and blue spots on faucet handles indicate the hot and cold water, respectively. This is not very common knowledge, and most faucets do not have these colored indicators, but it is something to be aware of.
The left handle is always supposed to be hot and the right handle is always supposed to be cold. If you turn on the right handle and get hot water, it means that the lines are hooked up incorrectly. This can be easily fixed by switching the lines.
This might not be a big problem for a sink faucet, but it can be a bigger problem for a shower or bathtub fixture because those are located in the wall and are not easily accessible for fixing.
Here are some bonus tips for maintaining your faucets:
Clean your faucet handles regularly with a damp cloth to remove dirt and grime.
Avoid using harsh chemicals or abrasive cleaners on your faucets, as these can damage the finish.
If your faucet handles are leaking, tighten the packing nut. If the leak persists, you may need to replace the faucet cartridge.
