Welcome! Here are the website rules, as well as some tips for using this forum.
Help for complete amateur
Completely new homeowner with almost no knowledge of home heating systems. My combi boiler is short cycling, with a new ignition cycle starting every minute. I wake up, Adjust the thermostat from 55-63 (its -35 outside if that matters). It seems to run smoothly at 10-20% for about 30 minutes. But eventually it starts to short cycle (prepurge/ignition/flame up to about 70%/postpurge/setpointmet/anticycling) every minute. There are seemingly random periods where it will settle into another smooth 10-20% burn for a few minutes before another period of short cycling. The call for heat isn’t being satisfied - thermostat temp is currently showing 59 when set for 63. I don’t even know where to start. There is a Honeywell 3 speed circulating pump currently on setting 3. Could adjusting it to 2 make a difference? Please help. This boiler has gone through over 450 gallons of propane, nearly $1600 in just over 2 months of us owning the house.