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Encountering Furnace Blower Problems? Troubleshooting Tips That Can Help

Monday, March 03, 2014

A lack of warm air coming from your heating registers can be a frustrating and stressful experience, but it doesn't always indicate a serious blower problem. There are simple fixes for some issues, so before you request a service call from an HVAC pro, try the following tips for troubleshooting furnace blower problems:

What to Look For Before Calling a Pro

Make sure the furnace is getting power. First, check your main electrical service panel to see whether the circuit breaker that controls the furnace has tripped due to a power surge, outage or storm. If everything is fine, check the furnace itself to see if there's an on-board fuse or breaker that needs replacing or resetting.

Check out your thermostat. If you're getting cold air from your registers, the thermostat's fan may be set to "fan only" or "on," so make sure it's on "auto" If the furnace blower doesn't kick on at all, check that the thermostat setting is 3 to 5 degrees higher than the displayed room temperature. If you have a digital, battery-operated thermostat, installing a fresh battery may be the solution.

Examine your furnace filter. If you haven't cleaned or replaced your filter monthly throughout the heating season, adequate airflow could be blocked by accumulated dust and debris. If so, your furnace's safety controls may have shut the unit down to prevent it from overheating. If you're feeling a decrease in warm air, your filter may be installed wrong. Make certain that it's in place with the arrow at the top, and pointed toward your furnace.

Look at the blower compartment. One possible culprit is the compartment cover panel. If it's not fully in place, it won't engage the power switch that's located behind it. If it's fine, flip the furnace circuit breaker so you can safely work inside the compartment. First, check the condition of the blower belt, and realign or replace it if necessary. Next, touch the blower motor itself to see if it's hot. An overheated motor can indicate a failure that requires a replacement.

For help with troubleshooting furnace blower problems, contact us today to find a West Texas contractor near you.

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