Heaters are mechanical systems, and that means that occasional operating problems are inevitable. Routine heating maintenance will certainly help to keep any such problems to a minimum, but you are eventually going to require professional heating repairs in Phoenix, AZ. The fact that our winter season is so mild does not mean that you can just ignore problems with your home heating system. While annual maintenance is a must, there is also one maintenance task that you should handle on your own, much more frequently than once a year.
That task? Changing your air filter. If you use a forced-air heater, such as a furnace or a heat pump, then you need to make sure you are keeping a fresh filter in that system at all times. Typically, it will need to be changed somewhere in the range of every 1-3 months. These filters are cheap and very simple to swap out, and the benefits of doing so as needed cannot be overlooked.