Marey heater’s hot water pressure is significantly lower than cold water pressure.

Safety first: Turn OFF power and close water supply before opening any connections.

Steps:

• Clean inlet filter: Remove and rinse the cold inlet mesh filter screen.
• Check valves: Ensure all isolation valves on the hot and cold sides of the heater are fully open.
• Descale heat exchanger: Perform a descaling flush to remove internal mineral buildup.
• Inspect outlet piping: Check for kinks or restrictions in the hot water line leaving the heater.

When to call a technician: If flow remains low after cleaning and descaling, the heat exchanger or internal valves may need replacement.