Can't seem to find the model number on the furnace. Where should I look?
Model No. NUH5100BFB1
OK , I have a manual. Now Heil used 3 different controls for bringing blower on on these furnaces. I am going to need you to look in the furnace and tell me which of these they used, One says "CAMSTAT" and has a fan on and off adjustment taht can be adjusted with a small screwdriver Second says "HEATCRAFT" and has a Fan adjustment also Third says "HONEYWELL ST9120 which is a control board that controls the fan on and off. Can you look and see which one you have. We can go from there.
HONEYWELL ST9120 Just to let you know just had furnaced cleaned just over a week ago. The guy that did the cleaning had all the wiring off at that time. Before he left the furnace did work properly but quit working after he moved the wire in the thermostat to G for the fan to run.
My furnace is running at the moment because I got it to work by playing with the FAN on and Heat on/off button. I set the temp back so the furnace will stop. Be about 5 minutes before I can reply back again.
I stopped the furnace made sure thermostat set to higher temperature and auto for Fan. Heat on for system and the furnace at the moment is working properly again. Fan and burner kicked in and now working normally. The wiring on the thermostat side has only 3 wires one on G, one on R, and one W. The same has been connected at the thermostat.
I going try one more time on the thermostat to see if the furnace will kick in properly again. It has so not sure why earlier today it wasn't working. The board is probably faulty. I assume that is costly?
OK I guess that answers my question. I need to try one more case where the temperature drops below the setting set on the thermometer that is where I noticed the furnace didn't kick in. I just raised the temperature and that seems to work at the moment.