_:n52029fc1de6a4b73aad8aed143030fe1xb0
<http://schema.org/description>
"I have a potential SHW customer that has a Vaillant boiler (about 10-12 years old). When I was looking over the boiler system, the boiler would fire every 10-15 minutes. All zones were closed and t-stats satisfied (it was about 70* outside). The temp in the tank was at the set point temp. The boiler will fire for a minute…"
<https://forum.heatinghelp.com/discussion/comment/1198852/>