Today yous're going to learn exactly how to find out why your furnace isn't turning on.

In fact:

This is the same approach I used to learn how my propane furnace needed a new pilot light.

Let's become started.

    • Step #i: Check your Air Filter
    • Step #2: Check Your Pilot Light
    • Pace #3: Cheque Your Thermostat
    • Footstep #iv: Cheque The Power
    • Step #5: Cheque Your Gas Supply

    When your furnace doesn't come on, it can be very aggravating because it's cold in your house. It's even more frustrating when you can hear the heater clicking on and getting ready to accident the toasty hot air…but and then goose egg happens.

    Most newer model furnaces are designed for reliability (assuming they've been maintained) over a long period and are one of the most expensive and almost needed appliances in almost every home.

    Reasons for your gas furnace non working tin be complicated or very simple. While you lot are probably improve off leaving the hard issues of thermocouples, wiring, heat exchanger, and blower motors to a qualified professional, there are a adept number of things y'all tin check earlier you phone a qualified HVAC contractor for furnace repair service.

    Earlier y'all attempt to fix a furnace that won't start, make sure you know what kind of furnace yous take. The nearly common in this area is a forced air and gas (propane, fuel oil, and natural gas) furnaces.

    Hither are five easy things you tin can practise on your own to troubleshoot why your furnace isn't working:

    Check to make sure the furnace filter is make clean.

    Clogged furnace filter

    If the air flow out of your registers seems low, bank check the air filter. A clogged filter can block air menstruum. Brand certain all your air registers are open and not obstructed with grit or objects.

    Cheque the pilot ignitions calorie-free.

    gas furnace diagram
    (Electronic ignitions volition non have a pilot lite). If your furnace clicks on or initiates the start cycle, merely does not burn upward, y'all likely have a faulty or dingy ignitor/sensor. This is one of the most common furnace bug. Nether normal conditions, the furnace is notified by the thermostat to click on, the ignitor gets carmine hot and then initiates the entire process of igniting the gas and blowing the warm air.

  • If You Feel Comfy: Bank check the error codes in your furnace user manual to make sure you do non accept a more astringent problem. To fix the furnace that won't showtime, turn off the power to the furnace-and turn off the gas. Remove the front end panel and await for the ignitor/sensor. Refer to your manufacturer's user transmission to locate the ignitor. It is usually found most where the flames shoot out of the burners. Basically, the furnace will not proceed in the starting sequence because the sensor/ignitor is dingy and needs to be cleaned.

  • Bonus Tip: Make clean Sensor

  • Removing the sensor with a screwdriver is easy. Clean the probe on the sensor by rubbing it with some medium grain sandpaper. Practice a precise job, but exist careful not to pause anything. Replace the sensor exactly the way y'all found it. Put the forepart panel back on, turn on the gas, and and then turn on the power. Turn up the temperature on your thermostat to see if your furnace will fire upward. If this doesn't solve the trouble, fourth dimension to give a technician a call.

    Check your thermostat.

    checking thermostat

    Make sure the temperature command selector is ready above the electric current room temperature, and the system switch is on the Automobile or HEAT position. The fan switch should be set to ON for continuous airflow or AUTO if you desire the blower motor to operate only while the furnace is operating. Attempt to become the furnace to turn on by raising the thermostat to its highest temperature setting.

    Check to brand sure power to the furnace is on.

    check furnace power
    At that place'south a power disconnect switch by the furnace, fifty-fifty gas systems utilize electricity. Check the fuse/circuit billow at the electric panel for the furnace to make certain the breaker has not tripped. Make sure the power switch next to the furnace is in the "On" "position.

    Finally, brand certain the propane gas supply (or other fuel) to the furnace is open.

    propane gas control valve
    Check to make sure the gas valve to the furnace is open. A disruption of the gas supply to your heating system could leave your heating system without fuel. If you olfactory property propane leak, leave your dwelling house immediately and then telephone call your propane supplier and a local HVAC contractor for emergency repair.