This is getting excessive!
So last year I realized that the greenhouse I was working in was a poor choice and I switched over to the smaller greenhouse attached to the chicken coop.
This was a GOOD IDEA! The plants have lived out here all winter and have been happy, which means I have been happy!

The furnace was pretty reliable… until a couple of weeks ago.
And then it died. First I thought that maybe the oil filter and screen needed to be replaced. I did that – no luck. So I tried taking it apart since I figured that I hadn’t cleaned the oil nozzle in the three (almost) years we have been here and I had no idea what the previous owners did. It was not pretty:

I replaced the nozzle but not the electrodes since they didn’t have the correct ones at the plumbing supply store. Mainly, because, as I learned by googling the serial number I finally found it after cleaning off layer and layer and layers of gunk, this furnace is from 1957 and the company which made this furnace, International Heaters of Utica, went out of business and it is close to impossible to find any information about this furnace.
And then I tried to restart the damn and this thing BLEW UP – like literally sparks flying, thank goodness for circuit breakers that trip when things catch themselves on fire – blew up.

So this limit switch is busted, I don’t know where one finds a new one for a 62 year old furnace, and I AM FED UP.
So I have decided that once I have two fully functioning legs I am going to attempt to move one of the other five, non-sixty year-old furnaces from one of the less useful greenhouses into this one and all will be well.
In the meantime Spring is almost here which means it hasn’t gotten too cold and this has actually been keeping the greenhouse warm at night:

This old fireplace insert the previous owners left on the porch which I moved into the greenhouse a couple months ago with the help of E, a willing friend, the tractor, and taking down one of the greenhouse walls (don’t worry – I put it back up). The cinder blocks are piled up all around it and filled with stones and it all makes a pretty decent heat sink. For now….