Home Heater Adjustment?

Every time it drops into the 40's and lower there seems to be a issue with the home heater. I'll put it at say 72, but the temp reading is 64 or 65. It's pretty damn cold.

It seems as though it just can't get the house warm and it doesn't click on like it does when it's a bit warmer outside. It's a 3-level townhome. My room being on the first floor.

I've never experienced this before. Is there a setting that may need to be tweaked somewhere or is it just the fact the floors are concrete?

 

Thanks Chas.

That's another thing I thought about. It's a 3-story townhome and it's throughout the house. There is only one a/c unit which has always seemed odd to me because it's not a big unit either. The problem exits throughout the house from what I've noticed. But I'm not sure about my roommates room since he's on the 3rd and heat rises.

But it's certainly a issue on the first two. The living room/kitchen is one big open space so it takes much more to warm up and the vaulted ceiling doesn't help.

I think you're probably right about the unit being low capacity. Thanks for you help.