Arrived on site to diagnose no heat on propane boiler. Upon inspection, we found that the aquastat had failed after a power outage the previous day. We provided an estimate to replace which was accepted. We only had an oil aquastat on the truck so we ran to the supply house to grab one. Once back, we removed the old aquastat and installed the new one. Wired it up and tested operation. While testing the unit we found that the gas pressure was 4.5” w.c. The boiler needs 9.8”. We believe when the gas valve was changed out the person who did it did not adjust the pressure correctly. We adjusted it to 9.8” and boiler is firing well. We recommend having someone come out to service the boiler fully.
