John Wood water heater frequently cycles on and off, causing temperature swings at taps

Safety: Adjust thermostat carefully to avoid scalding temperatures.

• 1. Lower thermostat setting: Reduce the temperature setting slightly to increase cycle length and reduce short cycling.
• 2. Check recirculation system: If a hot water recirculation pump is installed, ensure it is properly controlled and insulated to prevent excessive heat loss.
• 3. Verify sensor placement (electronic models): Ensure the thermistor is fully seated in its well.
• 4. Consider capacity: If demand exceeds tank size, consider upgrading to a larger John Wood heater or adding a storage tank.