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In that case, you will need to feel the inside of the furnace. If it is cool, the cause of the problem is most likely to be the furnace control board, the thermostat, the gas valve or limit control. The pilot may be lit, but the main burners fail to come on. Check to see if the furnace has a pilot light. The flame should be touching the tip of the thermocouple. If you notice that the light is missing, get a thermocouple replacement guide to diagnose the problems that might be affecting it.

If it is working, there will be a flashing green light. If the breaker or fuse is functioning properly, you will need to look into the inspection window of the furnace's blower compartment. If there is no light, either green or red, then the cause of the problem is most likely to be in the thermostat, transformer, the blower motor, furnace control board or the run capacitor. If you notice that the breaker has been tripped, leave it off and then check its wiring to see if there are any lose connections.

If you turn on the fan but it fails to start running, check the breaker, fuse, or the gas furnace's switch. If they there are, you will need to replace board, and then replace the breaker. Check the control board of the furnace to see if there are any burn spots. The next thing you will need to do is How to fix furnace check if it has been correctly connected to power. The cost to replace a draft inducer motor is moderate to high, but protecting your family's life is priceless.

Also remember that you will need to pay for service and installation of your new draft inducer motor, so be sure to add that cost into the overall price. If you own a gas furnace, you can expect to pay anywhere between $500 and $800 for this part, but prices vary depending on make, model, and retailer. For commercial units, prices may be higher. And so it having sufficient heat in the winter! If so, it is wise to take your HVAC contractor's advice since it could save your life.