Recently bought an old beverage air bm23c, was built 3/14/77 it was a wood panel design that someone painted, took me too long to figure that out, but otherwise good condition.
So I plugged it in and it did get cold, 12 hours later when I came back to it was warm. I heard the clicking noise so I replaced the starter relay but not the overload, while I was down there I cleaned the coils out really well and the area in total. Found a few dead mice..yay. Plugged in the new starter relay, it ran like a top all day. Put in the wall thermometer that we have in the shop and it gets coldmid 20’s on 7, I know water temp vs air temp is different I’ll get to that tomorrow. Seals up ok around the door and such. Came in this morning, heard the clicking sound again and inside air temp was 60+. So I unplugged it, an hour later plugged it back in and it’s running like a top. I have the t-stat set at 4.5 out of 7.
My question is, does this seem like it is a thermostat problem?
Compressor and coils turn on and get warm in the back, all fans come on. Compressor also seems to cycle ok. Not on too long or off too long. No weird noises.
Also, it seems that I don’t have a thermostat wire coming out to test the temp. I’ve seen pictures of others bm units with it. Mine doesn’t seem to have ever had one.
Thank you in advance for the help. I am super new at this but a proficient DIY-er.