NEST gen 3 calls for hot water even though not set to come on

[Pgaudit]

My NEST controller is turning the boiler on and calling for hot water (not rads) at the same time in the evening when it should be off.  I normally only have water Heating on for an hour in the morning, and heating is off completely as it's Summer. The NEST app, states everything is off even though NEST has turned on the boiler. Seems to happen same time every night. Is it true that NEST needs the boiler to heat water for a minimum of 2 hours a day of Legionella protection is on, or is it just a malfunctioning BEST Gen 3

[Jenelyn_O]

Hi Pgaudit,

Thanks for reaching out. A few questions: do you see any messages or codes on your thermostat or in the app? Also, in what states are you located? Please check your thermostat Energy History to see what your thermostat is doing previously. You can visit this support article on how to check Energy History in the thermostat or in the Nest app.

Best,

Jenelyn

[Pgaudit]

Hi thankyou, I think I have sorted out the problem. The thermostat was only set to come on one hour twice a day. I read when the thermostat is in legionella protection mode it needs the system to heat for at least two consecutive hours every 48 hours, which I wasn't allowing the system to do. 

Pguaudit

[Jenelyn_O]

Hi there,

Cool, I'm glad to hear that. It looks like you have come to a solution, so I'm going to lock this thread in 24 hours. If you have any other concerns or questions, please feel free to create a new thread, as we'll be willing to assist you from there. 

Cheers,

Jenelyn