Upon arrival spoke with housekeeper. Proceed to check status of boiler in mechanical room. Customer is having issues with singular basement zone not heating. Twinned Burnham boiler with multiple zones. Boiler’s are on/running @ arrival. Checked basement thermostat to have zone call for heating. Gym thermostat is located in boiler room. Temperature is registering @ 85 degrees ambient for basement. Raised temperature above 85 degrees to have zone call for heating. Check flow @ supply and return to be ok. Found wireless sensor offline. Batteries needed to be replaced. Replace batteries and reconnected wireless sensor for gym room. Thermostat is responding to sensor room temperature once more. Spoke with customer via phone and informed her x2 wireless sensor battery needs to be replace. Game room & Talia room sensor. Also informed customer that maintenance is needed for their system. Customer or office to follow up and schedule heating maintenance for x2 Twinned boiler with x13 zones. View