Marey heater’s hot water output smells like rotten eggs (sulfur odor).

Safety first: Odor is usually a water quality issue, not a heater safety issue.

Steps:

• Confirm source: Check if cold water also smells. If yes, the issue is with the incoming water supply.
• Flush plumbing: Run hot and cold taps for several minutes to flush stagnant water.
• Treat water: Consider installing a whole-house filter or water treatment system designed for sulfur and bacteria.
• Storage tank (if present): If you have a separate tank with an anode rod, consult a plumber about replacing the anode with a different type.

When to call a technician: If odor persists and you suspect contamination in the heater or complex plumbing issues.