For equipment that us as sturdy and steadfast as HVAC units, it is always tough to realize when it is finally time to part ways with a reliable heating system that had effectively kept you warm during cold winters and cool during summers.
On the other hand, as hard as it might be to get rid of a apparently functional appliance, all manufacturers of the appliances claim that replacing the system is a process that should be carried out by the end of the listed anticipated service life of a product. This time line is generally estimated to be approximately a decade for the air conditioning units and fifteen to twenty years for boilers and furnaces.
Nevertheless, mostly people overlook these simple guidelines, or are reluctant to act upon them given the expensive costs of such units. As service age is a serious aspect while determining heating replacement, some signs make replacing the HVAC units evident, explaining that the unit is too far gone to be rescued via repairs. Such symptoms are basically the stark indicators that the time for replacement for the units has arrived.
Core of any gas – fired furnace is its heat exchanger. The heat exchanger allows the heat to transfer from the gas burners to that it can circulate although the system. This is why the heat exchanger gets damaged in anyway, it is vital that you get it replaced.
Damage generally takes place in the heat exchangers in the form of holes and cracks. These occur as the exchanger heats up beyond their endurance capacity and eventually expand beyond their original design capacity.
Heat exchangers are very susceptible to rusting is there is a high amount of moisture in the area or if the furnace is closely bound to the central AC. Rusting may also occur in case the interior exchanger on the AC has an issue with its condensate drain or pan, which causes water leakage and dripping onto the furnace exchanger.
Signs that show a faulty heat exchanger include bad smelling that exhaust emanating into the living area and soot sinking into the orifices around the house or gathers around the furnace itself. It is vital that you get it fixed as a breach in the exchanger lets the noxious exhaust gases to mix with the circulated air of the system which can result in CO2 poisoning.