So this morning I had a bird get in the chimney again for the wood stove and well he got his goose cooked in a rather disgusting manner so no pics of that one. smelled good though . I had to fire up the furnace and it has had some issues I have not noticed before so I will try to explain them. The first issue is there is no manufacturer stamp anywhere I can find and from the HVAC guy down town he says that it is a 25 year old furnace. ( I have no idea if that is true or not and cant find any info online ) It already runs like crap makes a lot of noise squeeks and shakes the hole darn house too. 1) Turn on the furnace and warms up the house. 2) Furnace completes cycle. 3) Thermostate goes to cold temp to start new cycle. 4) Furnace does not turn on. 5) Turn thermostat off & on 6) Furnace turns on and sometimes completes cycle sometimes does not. Ok so my first thought was it is a faulty thermostat so I went and bought a basic spring one to replace the digital and see. So far it has worked better but not well ! I have had to turn the thermostat off & on twice to get it going. My next conclusion is it must be something in the furnace. Anybody have ideas ? Here are some pics of the furnace and thermostats. At this point I do not have the money to replace it and refuse to take a loan seeing as we use a wood stove only really need it for backup anyhow so we would like to fix it if possible. Thanks Pete EDIT ) I just found a manual taped to the back of the water heater and it looks like the manual for the furnace . ( Previous owners put a lot of things in really odd places too ! ) It says Models GY85 / GM8s / LY8s / LM8s / LF8 ( single stage uplfow / Horizontal / LoNOx ) What does this all mean ? There is still no name on the manual either !