I have a Heil brand gas forced hot ait furnace. It comes on & heats up, but doesn't blow hot air in the house. The blower comes on, but usually doesn't blow very hot air.
I had a tech come out four times. He said it is heating up to the right temp of 140 degrees. He replaced the fan control switch, and then the electronic thermostac. It is still doing it. Now he says that we do not have enough vents and wants to run another return.
The problem I have with that is the furnace is 10 years old and we lived her 4 years. It was never a problem before. Until this winter it would get very hot. I'd be swetting at 75 degrees. Now it feels cold and damp at 75, if it even reaches that temp. I'll have it set for 78 degrees and it will never show more than 69 or 70 at night. During the day it gets warmer, but I think that's from the sun coming in the windows.
Could sombody please share an opinion of what to do. It's going to start getting colder at night here in New Jersey. Thanks.