Arrived onsite to investigate insufficient heat on a recently installed propane boiler. The system was equipped with a smart circulator, which was displaying a yellow warning light indicating reduced operation. Possible causes include air in the system, low flow, a restriction, or low system pressure. System pressure was within normal range and no air was detected in the system. I replaced the smart circulator with a Grundfos three-speed circulator and verified proper operation. The system is working properly at this time. This visit is covered under Jerm’s warranty.
