The Heating, Ventilation, and Air Conditioning (HVAC) system in your house plays an integral role in keeping indoor temperatures at comfortable levels. However, despite your maintenance efforts, your HVAC unit might develop heating issues that would otherwise compromise its ability to function optimally.

While not every performance issue involving the HVAC unit requires the professional check up, there are cases where you ought to seek the services of a contractor. In this regard, if you notice any of the following heating issues with your HVAC, contact your technician immediately.

Burning Smell from Heater -- If there is a burning smell coming from your air-conditioning unit, then something is wrong. The first thing you should do is to put off the unit and unplug it from the mains supply. The burning smell might be caused by a dirt-clogged air filter or the buildup of dust in the furnace, which is easy to fix. However, despite these mild possibilities, it is critical that you do not try to find the cause of the fault by yourself for safety reasons. An HVAC technician will carry out a thorough check up and eliminate the causes of the burning smell.

The Heater Will Not Shut Off -- There are moments when the heater will not stop blowing hot air even after activation of the thermostat. In most such cases the thermostat is broken or the furnace has malfunctioned. Whichever the case, these are not issues you can fix without a solid understanding of the technicalities of an air conditioning unit. The risk of electrocuting yourself is high because of wiring complexities. A technician would ensure that they check and rule out all possible causes of the fault before commencing any repair work.

Uneven Heat Distribution -- One of the primary reasons that cause malfunctioning of an HVAC unit is a duct leak. In the case of an AC unit, a pipe leak is majorly caused by poor duct work. For instance, as air is heated along the unit's pipework, any spaces along the system would cause leakage and loss of heat. Consequently, some part of your house will get heated while others will not. Since it is tough for an untrained person to find a leakage in an air conditioning unit duct work, the chances of you finding one are very slim. As such a case, you should seek the services of a professional technician to avoid wasting time and energy trying to find the leak yourself.