The furnace that I have has the round thermos stat, when I turn it to 80 or up the furnace don't ignite, but if I. Go to the furnace it's a button to turn on manual, it start blowing. Now as the furnace is blowing its cold air coming out the ducks, an the pilot light is lit, what can I do?

I just changed thermostat battery now you can not almost feelthe air blowing

Ventor motor not blowing

How do I get quatro furnace 9500 to light up its blowing cold air/ no heat