It can be very frustrating dealing with a furnace that is not heating your space as expected.
In most cases, such a furnace has a severe issue that needs to be rectified.
More often than not, it is not something you can fix on your own and may require the services of an HVAC technician or HVAC contractor. It is even more complicated if the furnace is a gas furnace. To fix it, one has to open the registers. This will be the first thing the HVAC serviceman will check, especially if you have kids. They are likely to close most of them as they play, leading to a buildup of heat in the furnace. This, in turn, causes the furnace to overheat and trigger a sudden shutoff, sometimes even unexpectedly. Sadly, closed vents in registers can cause more issues than just overheating. They are likely to trigger system breakdown and worsen existing leaks since they tend to force the furnace to work harder than it should. The HVAC professional will also check the furnace settings and clean the thermostat. A slight deviation from the standard setting may direct the furnace to act differently when it shouldn’t. Be careful not to miss it as the thermostat accumulates dust. Always clean the thermostat and ask the HVAC technician in charge of the occasional tune-ups to do the same when they come for the session. It is also essential to check the furnace power. Whenever the circuit breaker is off, the furnace tends to shut down and not heat as expected. If you are familiar with such electric works, please leave it to the technician .