I think our heating plan is torn up because it’s stuck

Our heating plan is stuck in the on position.

I have the heating set to 79 degrees however the temperature in the lake house is already up to 85 degrees & it’s just getting hotter in here! I have never heard of this kind of thing happening before & it’s just crazy. It’s the middle of Winter here & the outside hot & cold temperatures are in the teens & twenties. However, inside of my house, it feels like a tropical rainforest! It’s so hot inside the lake house that I have on shorts & a tank top & no shoes, but not only am I dressed like it’s the middle of the summer, however I’m still dripping with sweat & wishing for the air conditioning even though it’s still the winter. It’s the weirdest thing that has ever happened to me. I don’t absolutely guess what to do about it, either. I have changed the batteries in the control component unit, however that didn’t seem to do a thing to help the situation. I don’t think that’s the problem, however I have no clue what the concern really is. I asked a couple of other people if they have ever heard about this kind of thing happening before, however no a single has. I really have the windows open & the temperature outside is still cold. I guess that I’m spending a fortune on heating a lake house that doesn’t need to be heated anymore at all! I suppose I’m going to have to call my local Heating, Ventilation plus A/C company & have them come to maintenance the gas furnace. Something is undoubtedly wrong & I can’t keep this up for much longer.

a/c tune up