There will be wear and tear, as with everything, including the human body, and heating and A/C systems will require tune-ups from time to time, if it needs an luxurious gas furnace/heater repair, it is wiser to invest in new heating and A/C equipment, especially if it is more than 10 years old, even if you maintenance the mechanical complications, bringing aging, for instance, the gas furnace back to peak efficiency, is almost impossible. The component has to work harder, breaking down more often, and you fall into a vicious and costly cycle. A new heat pump may cost a lot initially, but it will save you money on future repairs and your utility bills plus help with indoor comfort. You could save a large percentage on your energy cost by upgrading to a component with current heating and A/C technology. The other thing that may spell out disaster for your device is the sounds coming from it. A hum when the plan is running is okay, but when it turns loud and aggressive, it could indicate a serious malfunction. A component will often need help to provide quality heating. The temperature inconsistency could result from several complications such as a damaged or faulty control unit, low fluid levels, blocked gas furnace filters, cracked ducts, or serious motor damage. Another problem is if you are experiencing bad indoor air conditions. All cooling plus heating devices need proper heating and A/C maintenance done by an heating and A/C serviceman to run efficiently, prolong their lifespan, and avoid the complications mentioned above, then if you have observed some of these complications, contact your heating and A/C supplier immediately plus have an heating and A/C repairman maintenance the underlying complications, but please do not wait too long to maintenance it because the longer you delay, the worse the problem gets, when you learn more about heating, you realize that heat pump maintenance is non-negotiable to achieve a comfortable home.