The answer to 'water softener no hot water' is that a problem with the water softener can sometimes cause issues with hot water supply. This is because the softener may be incorrectly installed or malfunctioning, which can disrupt the flow of hot water throughout the home.
Some common causes include a clogged or stuck softener valve, a problem with the brine tank, or an issue with the water heater connection. Symptoms may include reduced hot water pressure, lukewarm water, or complete loss of hot water. The solution often requires troubleshooting the softener system and may involve adjusting, repairing, or replacing components. For more complex issues, it's best to call a professional plumber who can properly diagnose and fix the problem.