Furnace Troubleshooting: Frequent Heating Issues & Repairs

Furnace Troubleshooting: Frequent Heating Issues & Repairs


In the course of the winter, your furnace helps guarantee your loved ones’s consolation and security. However what are you able to do when your furnace isn’t adequately heating your own home on a chilly winter’s day?

When you can all the time name an HVAC service technician, typically you’ll have to attend a number of days or extra. And even in case you bundle up within the meantime, the chilly can nonetheless trigger points for your loved ones and residential.

At Fireplace & Ice, we get a whole lot of service requires furnaces every week in the course of the winter months. So when you wait in your service appointment, let’s undergo some frequent points that may impression your furnace’s means to warmth your own home.

A number of articles on furnace troubleshooting give attention to jargon-heavy points that require an intensive understanding of HVAC. This isn’t a kind of articles.

On this article, we give attention to frequent components that trigger heating issues you possibly can acknowledge simply by dwelling in your house.

This text could possibly assist if:

  • Your furnace isn’t offering sufficient warmth
  • Your furnace retains turning on and off with out operating a full cycle
  • Your furnace isn’t operating

In some circumstances, you could possibly tackle these points with out the assistance of an HVAC service technician.

Your Furnace Isn’t Offering Sufficient Warmth

When your furnace is operating however isn’t offering sufficient warmth, there could also be a problem with airflow.

Your HVAC gear’s main job is to maneuver air all through your own home. When there’s a problem with airflow, it’s possible you’ll discover a big temperature distinction. However decreased airflow can injury your HVAC gear if it isn’t addressed rapidly.

Frequent points that may have an effect on your furnace’s efficiency:

  1. Provide registers
  2. Soiled furnace filter
  3. Air duct dampers
  4. Undersized furnace

Luckily, many of those points are pretty minor at this stage. You possibly can even tackle a number of of them with out consulting an HVAC service technician.

Provide Registers

In the course of the heating season, provide registers ship heat air to the rooms all through your own home. Your provide registers could also be positioned on the ground or within the ceiling.

If one room is colder than the remainder of your own home, examine that the next are true:

  1. The provision register isn’t coated or blocked
  2. The vent on the register is open
  3. When your furnace is operating, air is coming from the vent

If the provision register is uncovered and open however airflow continues to be weak (or there’s no airflow in any respect), your provide registers probably aren’t in charge.

We’ll cowl two extra frequent heating points that might be proscribing airflow later on this article. However there’s one other much less frequent situation that’s price mentioning right here.

Over time, your ductwork can accumulate filth, mud and different particles. And since heated air travels by means of your ductwork, the buildup of filth in your ductwork can limit airflow.

The Nationwide Air Duct Cleaners Affiliation recommends having your ductwork cleaned each 3 to five years to advertise good well being and airflow.

For extra info, take a look at this text that covers one of the best practices for ductwork cleansing.

Soiled Furnace Filter

Your furnace filter helps take away filth and different particles from the air in your house year-round. This helps defend each your loved ones’s well being and your HVAC system.

However the extra particles your filter removes from the air, the extra it restricts airflow.

When your filter begins to considerably have an effect on airflow all through your system, it’s possible you’ll discover three issues:

  1. It takes your furnace longer to heat up your own home
  2. Temperatures are uneven all through your own home
  3. Weaker airflow coming from all provide registers

These might be the primary indicators that your filter must be modified. The longer a unclean filter stays in your system, the dirtier it is going to get. It will result in extra critical issues, which we’ll focus on later on this article.

I can’t stress sufficient how essential it’s to vary your furnace’s filter frequently. Soiled and clogged filters are the primary reason behind airflow points.

How typically your filter needs to be modified depends upon the kind of filter and your own home. One-inch filters usually must be modified each 30 days (or much less). In the meantime, some four-inch filters can last as long as a yr with out being modified. Your filter’s packaging ought to embrace further info on when it’s best to change it.

Chances are you’ll want to vary your filter sooner if:

  • You reside in an space with a variety of mud or development
  • You will have indoor pets that shed or molt
  • You often gentle candles

Whereas these are the commonest components we see right here in Central Ohio, there could also be further components relying on your own home. For finest outcomes, monitor your system’s efficiency. In case you discover among the points above, examine your filter.

For extra info, take a look at this text that breaks down how, why, and when it’s best to change your filter.

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Air Duct Dampers

Like your provide registers, air duct dampers help you regulate how air strikes to particular areas of your own home. However your system’s dampers are positioned near your furnace.

Dampers are usually set in another way for the heating and cooling seasons. These settings can assist compensate for seasonal modifications. In case you discover that a part of your own home appears chilly, your dampers is probably not positioned for the heating season.

You possibly can reposition your dampers your self. However repositioning your dampers can contain a variety of trial and error in case you’ve by no means completed it earlier than.

In case you aren’t comfy adjusting the dampers your self, an HVAC service technician can assist. Ask your technician to regulate your dampers for winter throughout your furnace’s annual tune-up.

Undersized Furnace

Whereas undersized gear doesn’t all the time have an effect on airflow, it might probably damage your furnace’s efficiency.

On this case, an undersized furnace refers to a furnace that isn’t highly effective sufficient to adequately warmth your own home.

When your furnace is just too small in your dwelling, it’ll run extra typically than it ought to in an try and warmth your own home. However regardless of operating often, an undersized furnace gained’t have the ability to adequately warmth your own home.

In case your furnace is undersized, it’s possible you’ll discover:

  • Uneven temperatures all through your own home
  • Higher flooring and rooms farthest out of your system stay chilly

Whereas oversized gear tends to be extra frequent, undersized gear continues to be too frequent right here in Central Ohio and all through the nation. (We’ll discuss outsized furnaces later on this article.)

Your Furnace Retains Turning On & Off

When your furnace activates and off with out operating an entire heating cycle, we name this quick biking.

In case your furnace is brief biking attributable to ignition points, your furnace might try to begin thrice with out operating. In newer furnaces, this usually leads to a delicate lockout. The furnace will undergo this course of two extra occasions.

After the ultimate try, a more moderen furnace will enter a onerous lockout, which solely an HVAC service technician can tackle.

However older furnaces might go into a tough lockout after the primary three makes an attempt to ignite.

When your furnace enters a lockout, it gained’t produce warmth. But when a problem doesn’t set off a security function, it could produce warmth even whereas quick biking.

Frequent points that trigger quick biking:

  1. Soiled furnace filter
  2. Soiled flame sensor
  3. Soiled burners
  4. Outsized furnace

Soiled Furnace Filter

When your furnace begins quick biking, this could be a warning signal that your furnace is overheating.

Within the earlier part, we mentioned how soiled furnace filters can have an effect on your furnace’s efficiency by proscribing airflow. With sufficient airflow restriction, your furnace will overheat.

Overheating can majorly have an effect on your furnace’s life expectancy. If left unchecked, overheating can injury your furnace’s parts, just like the warmth exchanger, a steel half that heats the air that circulates all through your own home. Warmth exchangers can value as a lot as $3,500 to exchange.

Overheating may also injury your furnace’s security options, like restrict switches. Restrict switches shut down your furnace when it overheats. However restrict switches may also get caught in case your furnace overheats.

Soiled Flame Sensor

A flame sensor is a security function that turns off the gasoline in case your furnace’s burners don’t gentle. This ensures that gasoline doesn’t fill your furnace cupboard.

However as a result of a flame sensor sits in open flames from the burners, it accumulates soot over time. If the flame sensor isn’t cleaned off, ultimately it gained’t acknowledge whether or not the burners are lit or not.

Fortunately, this tends to be a fast repair. Your HVAC service technician ought to have the ability to clear off a unclean flame sensor rapidly.

Your HVAC service technician must also clear your flame sensor throughout your annual furnace tune-up. This helps be certain that you don’t get caught with out warmth on a chilly day.

However as straightforward as this repair is, I like to recommend leaving the flame sensor cleansing to knowledgeable. Flame sensors have to be positioned at a particular angle. In any other case, your furnace will proceed to kick on and off with out heating your own home.

A Fire & Ice HVAC service technician cleans a flame sensor during a furnace tune-up.

Soiled Burners

Your furnace’s burners assist channel the open flames that warmth your own home.

Like flame sensors, burners can accumulate soot over time. This soot can clog the burners. When the burners don’t gentle, the flame sensor turns the furnace off. 

Additionally like flame sensors, your HVAC service technician can tackle soiled burners by cleansing them.

Outsized Furnace

Outsized gear might not expertise lockouts. But when your furnace is outsized, it probably gained’t run a full heating cycle.

On this case, an outsized furnace refers to a furnace that’s too highly effective in your dwelling.

Exterior of HVAC gear, we are inclined to favor larger and extra highly effective choices. However the measurement of your HVAC gear isn’t an possibility. To get essentially the most out of your system, your HVAC gear have to be the precise measurement.

In case your furnace isn’t the precise measurement in your dwelling, you’ll lose out on extra than simply consolation. Chances are you’ll want to exchange an improperly sized furnace as a lot as 10-15 years earlier than an precisely sized furnace.

To be sure to get essentially the most out of your furnace, take a look at this text that breaks down how your HVAC associate ought to measurement your HVAC gear.

Your Furnace Isn’t Operating

There are few issues fairly as worrisome as a furnace that stops operating throughout winter, particularly in case your furnace quits throughout a time when HVAC service technicians are in excessive demand. I imply, HVAC gear all the time appears to interrupt down once you want it essentially the most, proper?

There’s a purpose for that. In case your furnace is below pressure, it’s already working onerous to warmth your own home. However throughout chilly snaps, a strained furnace has to work even more durable.

However there are small points that may trigger your furnace to close down. You could possibly tackle a few of these your self and switch the warmth again on rather more rapidly.

Frequent heating points that may stop your furnace from operating:

  1. Thermostat settings
  2. Soiled furnace filter
  3. Tripped breaker
  4. Malfunctioning igniter

Thermostat Settings

Your thermostat settings aren’t all the time in charge, in fact. But when you must wait a number of days for a technician, it might probably assist to examine among the components you possibly can management.

Thermostat troubleshooting guidelines:

  • Ensure that your thermostat is switched to “warmth,” particularly if it’s early within the heating season.
  • In case your thermostat has batteries, strive changing the batteries.
  • When you have a wifi thermostat, ensure that it’s related to the web. In case your thermostat gained’t join, it’s possible you’ll must restart your router.

Soiled Furnace Filter

In earlier sections, we’ve talked about minor signs and warning indicators that your furnace filter must be modified. If left unchecked for lengthy sufficient, a unclean furnace filter can go away you with out warmth solely.

Within the earlier part, we talked about how a unclean furnace filter could cause your furnace to overheat and quick cycle. Finally, this may set off a onerous lockout in case your furnace doesn’t have sufficient airflow. And as we mentioned earlier, solely your HVAC service technician can unlock your furnace after a tough lockout.

In case your furnace stops operating attributable to a unclean filter, your service technician must also examine on the situation of your furnace’s parts.

A Fire & Ice HVAC service technician inspects a furnace's heat exchanger during a furnace tune-up.

Tripped Breaker

Generally your furnace can journey your circuit breaker. When you can reset the breaker, likelihood is that it’s going to occur once more. A service technician will probably want to check out your system.

One purpose your furnace might journey a breaker is because of a strained blower motor, a element that’s chargeable for circulating air all through your own home.

Your blower motor can develop into strained due to some components, together with:

  1. Diminished airflow all through the system. Soiled furnace filters and closed or blocked registers can topic your blower motor to pressure. You possibly can tackle these by frequently altering your furnace filter and checking your registers (which we mentioned earlier on this article).
  2. Particles buildup on the blower fan. Like your furnace filter, your blower fan can accumulate filth, pet hair and different particles over time. Your HVAC service technician can tackle this by deep-cleaning your blower fan.

Malfunctioning Igniter

Your furnace’s igniter supplies the spark that heats your own home. However your igniter can put on out over time.

Many trendy igniters can final between 10-20 years (relying on the kind of igniter).

Luckily, your HVAC technician ought to have the ability to substitute your igniter rapidly.

How Improper Set up Impacts Your Consolation

An improper set up units your furnace as much as fail from the start.

Your HVAC associate ought to set up your furnace in accordance with producer specs and native constructing codes. This helps arrange your furnace to function safely and effectively.

Selecting an HVAC contractor that follows trade finest practices is one of the best ways to make sure that your HVAC gear is put in correctly.

In line with these finest practices, your HVAC contractor ought to carry out a load calculation and pull permits earlier than they set up your new HVAC gear.

Permits are required by legislation. However on prime of protecting you legally, permits additionally assist guarantee your security. As soon as your HVAC contractor installs your gear, a third-party inspector checks that the set up complies with native constructing codes and producer specs.

For the whole lot you’ll want to find out about your furnace – from set up to day by day perform to routine upkeep – take a look at our information to dwelling furnaces.

Three Steps that Assist Forestall Frequent Heating Issues

Sadly, you probably gained’t have the ability to fully keep away from furnace repairs or heating issues. However you do have the ability to stop them for so long as attainable.

Three steps that assist stop frequent heating issues:

  1. Change your filter frequently
  2. Schedule a furnace tune-up yearly
  3. Select an HVAC contractor that follows trade finest practices

These steps can assist you get essentially the most out of your HVAC gear, particularly when mixed.

In case you’re on the lookout for an HVAC firm to assist defend your system, we’d love to talk with you!

At Fireplace & Ice, we’re devoted to your consolation and your HVAC system. We have now expert service technicians and educated consolation specialists on employees that will help you customise your HVAC system. And all of our workers take the time to know your wants and totally clarify all attainable options.

To schedule a service appointment in your furnace, enter your zip code beneath.

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