As temperatures drop, your furnace becomes the unsung hero keeping your home warm and comfortable. But like any hardworking appliance, it can run into trouble, especially after months of sitting idle. Staying alert to early warning signs can help you fix small issues before they become expensive emergencies.

Here’s what to watch for in your furnace as winter sets in.

Few things are more frustrating than a cold morning and a silent furnace. If your unit won’t start, check the basics first. Make sure the thermostat is set to “heat” and has fresh batteries. Confirm that the power switch is on and the access panel is secure. Then, inspect your circuit breaker. If it’s tripped, flip it fully off and back on.

If the breaker trips again, you could have a wiring or overload problem that require

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