Furnace keeps cutting off approx. 1 min. after I turn it on. Could it have something to do with my fan limit control? I had someone come in and look at my air conditioner at the begining of the summer and i think they adjusted the fan control limit at that time.What is the proper settings for my TRAN-Forced Air Furnace-Model:GUCDA-10-B, Type:174-470-2-A?? Fan Limit Control current settings are (90-140-190). I am FREEEEzing!!!!!
I'm not familiar with this unit, but if it is a newer gas unit with electronic ignition vs. the older pilot light method, one possibility is that the "glow-plug" has gone bad and the furnace isn't igniting. If the furnace tries to light, but doesn't, after a short amount of time, this lack of ignition is detected and the whole thing shuts down. Just a guess - I had similar symptoms a couple winters ago. Good luck
If it is a newer model, there will be a control board in the blower compartment and it has an LED on it that will flash a code if there is a problem with the unit. You can tell if it does by looking at the lower cover, there will be a little round window on it to view the light. If you see it flashing take off the front panel where the burners are ad there will be a diagnostic list on it. Count the flashes and read the code. Not knowing the type of furnace, if it is an 80% or a high efficiency unit, I couldnt help any further.