Intermittent hot water; Takagi unit cycles on and off rapidly, causing temperature swings.

Safety first: Water may be hot; avoid scalding when removing aerators or showerheads.

Steps:

• 1. Increase flow: Open the hot water tap further or open an additional hot fixture to see if the unit stabilizes.
• 2. Clean aerators and showerheads: Remove and clean debris and scale from faucet aerators and showerheads to restore proper flow.
• 3. Check inlet filter: Clean the cold water inlet filter screen on the Takagi unit to improve flow.
• 4. Adjust temperature setting: Lower the set temperature on the remote. This can reduce cycling by requiring less modulation at low flows.
• 5. Professional evaluation: If short cycling persists, a technician should check the flow sensor, flow adjustment valve, and system design (e.g., recirculation, mixing valves).