One more diagnostic measure will be taken by confirming that thermostat is properly wired up. This will confirm diagnostic and Zone valve will be replaced. February 16, 2023 – arrived on site to customers home and took thermostat off the wall to ensure that issue was with zone head for bathroom. Unwired zone head and found that N switch was shorted and valve was stuck shut. This is believed to be the reason why the pump failed due to constantly having a call for heat with no path for flow. provided and installed new zone head and re-pressurize system and tested for leaks. No leaks present. Bled air from system and wired zone head. Tested zone head by turning on and off thermostat multiple times to ensure proper function of zone head. Tested all thermostats and insured all zones were opening. Raise water heater temperature to approximately 115°F. System is now functioning as designed. Thank you for choosing CPI Plumbing and Heating!