No hot water at some fixtures but other fixtures get hot water normally

Safety first: Turn OFF water supply to fixtures you are working on. Use caution when checking for hot water to avoid scalding.

Steps to check:

• Test multiple fixtures: Identify which fixtures have the problem. If only one or two are affected, the issue is likely in the local plumbing.
• Check for crossover: Turn OFF the cold water supply to the suspect faucet and open the hot side. If water still flows strongly, cold water is crossing into the hot line through that faucet.
• Repair or replace faucet: Replace the faulty mixing cartridge or faucet that is causing crossover.
• Inspect recirculation check valves: If you have a recirculation system, ensure check valves are installed and functioning to prevent backflow.

When to call a professional: A plumber may be needed to correct complex crossover or recirculation piping issues.