Heating and cooling specialists are urging people to make sure they check up on systems in their homes.

Now that systems are catching up, specialists are receiving a large number of calls. They advise people to do the check-up before extreme cold or extreme heat.

Regular maintenance helps avoid common isues. They said the heating and the cooling should be checked at least once a year.

Experts also recommend recording any sound your house makes with a cell phone if possible. That way, if the house makes a noise, they will know what to listen for.