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ATAG one random call up

Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws

G

Grahame Tranmer

Hello I have an ATAG boiler controlled by an ATAG 1 thermostat been good for three years but now randomly called for heating on full temp ,not good with the current price of gas anyone got any ideas what’s causing this ?
Cheers
 
Is it coming on when really cold outside where you are?
Might be trying to achieve the next set temp in a reasonable time?
 

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