An unkempt HVAC system can result in high energy costs and also a decrease in the lifespan of the appliance. The system could also put your family members at risk hypothermia and other health issues.
Hire an expert to heat your home if adjust your thermostat, but you don't notice any cool air coming out of the vents.
Furnace Won't Turn On
If your furnace isn't turning on then the first thing to do is verify that the electric power that is connected to your unit is in place. Inspect your breaker box for the circuit breaker which regulates the furnace. It may be tripped, either by an accident or because of a malfunction in your system. You can try turning it off and run the heater.
Verify that gas is flown. An open gas valve can pose the most dangerous safety risk and will keep your furnace from starting it, and you'll be able to identify if the valve is closed just by looking at the small handle that is located parallel or perpendicular to the pipe. The valve is always opened, but it may be shut off by accident or caused by workers who work with utilities lines.
If you're using a standard, older furnace, there's chance that the pilot light has gone out. Read the user's guide for more information on how you can light it again if this occurs. You can also try removing the top panel of your furnace to find one small lever that allows you to restore the pilot light. If you think there is a serious problem, it's best to call a professional. They'll evaluate the condition of your burner and make the necessary repairs.
The furnace won't stop.
A furnace should run for a certain period of time in order to heat your home up and then shut off. This isn't just annoying however, it can increase your bills because your house is not being heated effectively.
There are a variety of solutions to the problem before you call a technician. Make sure that the power switch to your system is on. The basic power switch on all furnaces close to the appliance. Check the circuit breaker and fuse on your furnace in order to be sure they aren't turned off.
Another possibility is that someone inside your home may have set your thermostat too excessively high and the furnace is constantly running to meet that. If this is the case, simply lower your thermostat settings.
If you're still having this issue, it may be an ignitor that is dirty or a sensor, which is relatively easy to repair and will only cost a couple of dollars. Start by shutting off the gas on the furnace and then remove the front panel of the unit to access the ignitor/sensor (refer to your manufacturer's user manual to locate the specifics on the location).
Follow the instructions to clean the ignitor and sensor. If you're not successful it is possible that you need to consult an expert.
Furnace Smells
At the beginning of turning your furnace on, you could notice a slight burn or smokey scent. The dirt on your appliance is being forced through the air vents that are part of the furnace. It will be gone in 2 hours. Close your heater and use two windows to let air circulate through the house If it's not.
The heater could be in trouble when you still smell burnt oil or smell of plastic. Heating wires from older models can crack and expose naked wires. These short each another when the appliance is turned on. Contact a technician right away if you suspect that this is an issue.
It is possible that mold has been developing in your air ducts if you notice a musty odor. The result could be serious medical issues, and it is important to have it fixed as soon as possible.
A sulfurous or rotten egg smell is a major health hazard. Gas leaks could cause this smell. It is recommended to heating system service near me turn the system off and keep away from your house until the technician has cleared the issue. Gas lines are likely to leak. This must be repaired as soon as possible.
Furnace Won't Turn Off
Thermostats control the heating system and turn them off and on as needed. An unfunctioning thermostat could make your heating unit constantly running. If you want to check the thermostat to determine the problem, first compare the temperature setting with the room air temperature. If the temperature setting is higher than that of the ambient temperature it will keep operating until it has reached the set temperature. If this is the situation, simply changing it to "auto" can fix the issue.
Filters that are blocked is another frequent issue. Air filters that have become dirty block airflow through the furnace and also over your heat exchanger. This can trigger the high limiter switch to activate and shut off your furnace. It is often a sign of a more serious issue that requires the help of an expert.
At the end of the day, it is possible that your fan limit switch is set to manual. In order to test this, you must remove the cover that covers the front of your furnace and look at a button of white color which manages that fan's limit switch. If the switch is pushed in, it must be reset into automatic mode to stop your furnace's fan from continuously running.
If the heat isn't turning off even after checking these items, then you might need to replace the limit switch of your fan, or thermostat. Only a professional in heating with a solid understanding of electricity is capable of tackling these problems. The risk of causing damage to your heating appliance or, worse still, cause an electrical fire if trying to solve these problems yourself.