You should expect your furnace to blow cool air only at the beginning of a heating cycle before the heat exchange process picks up. However, if your system has been running for at least half an hour or longer and it's still blowing cold air, you may have a problem. Note that this can be frustrating, especially on a cold evening when you need your heating unit the most. As such, you may want to learn why your system is blowing cold air and see if you can resolve the issue.
The air conditioner (AC) plugs into a circuit breaker that cuts off the electrical supply to the AC in case of a fault. Numerous faults can trip the circuit breaker, but you can classify most of them under the following two categories.
1. Short Circuits
An electrical short circuit occurs if electrical current flows through an unintended path. A short circuit is dangerous since it can cause an electrical fire, electrocution, or damage electrical components.
The heat exchanger is the chamber inside of a gas furnace where combustion takes place. Under normal circumstances, the heat exchanger transfers heat from burning fuel into the air around it, and then expels waste gas through the furnace flue.
Overheating, corrosion, and advanced age can all cause a furnace heat exchanger to crack. A furnace with a cracked heat exchanger is unsafe to operate because it may leak toxic gasses into your home's breathable air.
If you have an older furnace, you may still have a model that relies on a pilot light for ignition. Manufacturers have entirely phased out pilot light ignition from modern furnaces, but many homes still use older models with these systems. Efficiency is the primary disadvantage of pilot lights; these systems are otherwise fairly reliable and easy to understand.
Of course, the relative inefficiency of pilot lights is no reason to stop using an otherwise operational furnace, so you're probably looking for solutions if your light won't stay out.
What would happen if you failed to maintain or service your HVAC system? Well, nothing good comes out of negligence. HVAC services are crucial, and you should never take them for granted. Here are the consequences of taking HVAC maintenance lightly.
Low Air Quality
The air quality will be a massive problem if you haven't been servicing your HVAC system. Expect the quality to deteriorate as time goes by. This can be attributed to the dust, pollen, and pet dander accumulating in the ductwork.