Have reason to believe that your furnace might be broken? Better get that fixed before the weather gets colder. Luckily, there are some things you can do yourself to investigate the problem before paying a professional to come out.
Begin by checking the thermostat, making sure it is on “heat” and that the temperature setting is sufficiently high to make the heater come on. Turn the dial a little higher to see if that turns the heat on. If you have a programmable thermostat, make sure the time and date settings are correct. Follow the thermostat wires back to the furnace, checking for breaks.
If you have a programmable thermostat, try replacing the battery. If that doesn’t fix the problem, open up the thermostat and blow out any dust or debris. Make sure it’s firmly attached to the wall and that it doesn’t have any loose wires.
Your next action should be to check the shutoff switches and breakers. Find the standard wall switch near the furnace and check whether it’s on or off. Check the circuit breaker or the fuse near the furnace as well. See that the panel in front of the blower motor is fastened securely (for the furnace to work, the switch must be completely pushed in).
Check whether the furnace filter is clogged, and if so, replace it – a clogged filter can cause the furnace to shut off completely.
You’ll also want to make sure that the gas is on by tracing the gas line from the furnace to the meter and checking that the handle is parallel to the gas pipe. Remove the front panel to the pilot light and check to see that the burner is lit.
Still not working, huh? Make sure the chimney exhaust flue is clear. To do this, turn the furnace off and the thermostat all the way down. Then, take apart the duct where the exhaust flue connects to the furnace and check for debris.
It’s also good idea to flush out the furnace drain lines, since the furnace will shut down if the drain lines are blocked by mold or sediment.
Ensure that all of the room registers are open, and then take a look at the duct work. Check for blocked ducts and seal any gaps.
Lastly, remove any debris or leaves from the intake and exhaust vents on the outside of the house to make sure nothing is obstructing them.
Well, you’ve done about all you can do! If you still haven’t found the source of the problem, it’s probably time to call in a professional.
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The Making Cents of Energy blog is written by published by Thompson Plumbing Heating & Cooling. Visit our website at http://www.333Help.com.
(Flickr Photo by jronaldlee)