&gt; But your thermostat can request heat 24&#x2F;7 and unless the furnace control board is broken, it&#x27;ll the cycle the system as necessary to keep up with the requests.<p>I have a hot water boiler. Even when constantly calling for heat, I can hear the element relays click on and off to avoid over-pressuring. The recirculation pump stays on the whole time.<p>(I&#x27;m agreeing with you; just pointing out that my system does cut out under normal operation, while calling for heat.)