Cold Moodlet Indoors

Do your sims have a thermostat? If not, you should buy one and set it to warmer so your sims can be comfortable in their house. You can also use the thermostat in the summer and set it to cooler.

Here's a link with a picture of the thermostat if you need help finding it in the build catalog https://goo.gl/images/jc4Ycn

Thank you, I bought a thermostat and they are now cozy as can be. o:)

You can also add a fireplace and light it -- that should help as well. Makes for nice atmosphere as well.