Munchkin boiler, help me understand this condensate issue

[TT_Vert]

So the other day the flame rectifier probe got a bit dirty and it wasn't detecting flame and shutting down. Cleaned the probe and all was well again. I had serviced the boiler about 5 months ago and it's been fine, i probably didn't clean the probe, just the igniter so no biggie.

However while I was in there while cleaning the rectifier probe I decided to check the condensate line which was fine. I woke up today to cold floors again. Figured the probe was just on it's last leg and it wasn't firing again. Upon inspection I realized my dumb *** left the condensate hose out of the drain and higher than the level of the condensate area so it had nowhere to go. I figured I may have partially flooded the boiler (Not sure why since it was at 140deg outlet temp when i looked at it) so I took it apart but it was dry. Blew out the condensate again just to be safe while I was in there. I fired it back up and all is well.

My question is what happened and why was the system not functioning if the outlet temp was 140 degrees, zone valves opening and pump pressure was good? I figured I had flooded the boiler and it wasn't firing but after discovering that was dry I was clueless as to what actually was happening here.

Anyone have any insight?


Thanks
Dave

 

[TurnipTruck]

My wall-hung condensing boiler has faulted three times in the 5 years I have been in this house. One was sand in the gas regulator causing an overpressure, the other two were caused by gunk on the float/check ball on the condensate drain, which caused a back up of water, which then blocked air to a permissive pressure switch during the next ignition trial.
Does your boiler have a sump or low point that can be cleaned out occasionally?

 

[TT_Vert]

My wall-hung condensing boiler has faulted three times in the 5 years I have been in this house. One was sand in the gas regulator causing an overpressure, the other two were caused by gunk on the float/check ball on the condensate drain, which caused a back up of water, which then blocked air to a permissive pressure switch during the next ignition trial.
Does your boiler have a sump or low point that can be cleaned out occasionally?

it does and it was clean. Like I said I pulled the hose out of the drain pipe that goes outside and wedged it so the exit was higher than the sump. Which caused this problem, I just don't know why it did or what it did. I had no back up of water into the boiler which is what i expected but didn't see.

Dave