In the event that you are discussing a wire free close by the circuit might look great with the visual test then, at that point, still coherence/ohmmeter test is required.
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Check the fuse in your furnace to see if it has blown.
If your furnace has a blown fuse, you should first turn off the power to the furnace and then replace the blown fuse with a new one of the same type and rating. If the fuse continues to blow, it may indicate a larger issue with the furnace that requires professional repair.
Yes, a blown fuse can cause your furnace to not turn on. Check the breaker box and see if any of them have tripped.
Sounds like you might have a blown transformer, or a blown fuse on the transformer. Hope for the fuse. Its on the Furnace. Be sure your white wire is on the heat side of the thermostat, and the red wire is on the correct terminal also. The transformer can be checked with a voltmeter.
You know your car has blown a fuse if whatever the fuse is for suddenly quits working. For example if your radio is playing and for no reason quits it may be a fuse has blown.
A furnace may not kick on due to issues such as a malfunctioning thermostat, a blown fuse or tripped circuit breaker, a faulty ignition system, or a clogged air filter.
If the furnace only blows cold air the pilot light may be out. It may also be a fuse that has blown. However, you may need to contact a licensed electrician to find the problem.
Has the AC fuse blown in your system?
Pull it out an look at it. Most of the time you can easily see it is blown. If not check it with an ohm meter.
Put a continuity check on it. This can be done with an ohm meter. If there is no reading then the fuse is open.
Remove the blown fuse. Replace it with a new fuse.
Your furnace fan may not be turning on due to a faulty fan motor, a malfunctioning thermostat, a blown fuse, or a tripped circuit breaker. It is recommended to check these components and consult a professional if needed for further diagnosis and repair.