If you're concerned about your heating system's performance, here are a few simple things you can do to try and find the source of the issue:
* Check the thermostat settings and batteries
* Change the air filters
* Inspect the circuit breaker and power switch
* Look for leaks, cracks, or rust
* Clean out the vents and ducts
* Listen for unusual noises
If you discover an issue, it's best to contact professional contractors.