Tit-bits About Maintaining A Furnace

Furnaces in most situations do not exhibit frequent malfunctions. The units operate quite smoothly and are easy to maintain. Furnaces are of various types such as units running on gas, oil or electricity etc. There are various types of room heaters too. No matter what type of heating solution you have for your house, there are several things that you should do to keep it at the top of its efficiency. Read on to know how to service and troubleshoot your furnace, regardless of the type.

The parts of a furnace can be broadly divided in two three categories - heat source, distribution system, or thermostat. If the unit is malfunctioning then the fault lays in either three. If the unit is not running, the defect probably is present lie in the source. There could be lots of reasons for the non-functioning units.

They are

• The furnace or air conditioner may have lost power
• Fuel may not be reaching the unit
• If the fuel is gas or oil, it may not be igniting

Sometimes the fault could be in the distribution system. In that case the furnace will turn on, but hot air will reach your room. The cause could be:

• Dirty ducts
• Leaky ducts
• Dirty filters
• Faulty blower

And a faulty control, or thermostat, could keep the system from turning on or could cause it to turn on and off repeatedly.


If the furnace is not running at all, first check if it is getting power. Check if it is plugged to a working power panel. Check for blown fuses or tripped circuit breakers at the main entrance panel. Look for a reset button. It should be near the motor housing. Press the reset button. If the furnace does not turn on, wait for 30 minutes. Press the reset button again. Repeat at least once more. If the problem persists the motor could be burnt. It requires professional intervention.

Sometimes fuel does not reach the burner. This generally happens due to faulty valve. If this is the case the valve requires to be changed. The fuel also does not get ignited sometime due to a misaligned burner. The burners could also be clogged with debris. You can use a stiff-bristled brush to clean the rust or soot from the burner face. In case the condition is that bad, then you have to call a technician. They might use air pressure or dry nitrogen to blow out the burners and burner vestibule area. Dirty and dusty burners can make furnaces susceptible to carbon monoxide leakage. Replace severely rusted burners.

Also check if the igniter and flame sensor working. Inspect the heat exchanger and the flue for excessive rust, cracks, or holes. You have to depend on your naked eyes. A professional would use inspection cameras and dye penetration inspection systems.

Sometimes the furnace comes on but pilot light gives a frail yellow flame. This could be due to Carbon monoxide leakage. Contact servicing technician immediately.

In spite of troubleshooting if you are not able to restore the furnace then call a servicing technician. They will check the static pressure of the device. They will do a combustion analysis and many more.

If the heating levels are not adequate, could be due to dirty and leaky ducts, Contact a professional cleaner to get it cleaned. Leaky ducts need to be sealed with mastics and layers of insulation. A faulty blower motor can also impact the circulation of hot air to rooms. Locate the blower motor and examine its belt to check if it is cracked, frayed or broken. Simply replace the belt to get the blower motor operational again. Check if the motor is overheating. In that case it requires to be inspected by a technician.

Also check if the thermostat is working. The batteries should have run out. Also see if it is set at high level for hearing. Check the terminals of the thermostat that connect it to the machine. If the unit uses gas or oil make sure that there is enough supply of fuel.

Before doing the troubleshooting and tune-ups, make sure all power to the system is turned off. Lubrication and belt adjustment at the furnace are also important.



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