Answer: furnace
Insufficient heating can be caused by inadequate insulation, incorrect furnace size, and dirty or blocked air ducts.
Banging sound: Loose parts Squealing sound: Malfunctioning motor Rumbling sound: Delayed ignition
Lack of maintenance can lead to higher bills. Dirty filters also force the furnace to work harder, hence more energy.
Ignition issues can prevent your furnace from starting and is usually caused by an interrupted gas supply and a faulty igniter.
Overheating and clogged air filters can lead to constant cycling wherein your furnace runs without reaching the desired temperature.
Water leaks near your furnace can often be attributed to a blocked condensate line.
Attempting DIY repairs beyond your skill level can worsen the problem.