As long as the furnace serving your home was correctly sized when it was installed, you can expect to be able to receive the level of heating comfort necessary no matter how cold the outside weather gets. But at some point you may notice a drop in comfort, with some or all of the rooms not receiving the warmth necessary. You may be tempted to push up the thermostat setting higher than normal to compensate, but please don’t. When your furnace is having trouble keeping up, it likely needs repairs—or even a replacement.
Common Causes of a Decline in Furnace Heating Power
As we mentioned above, proper sizing for a furnace on installation means it can deliver the heating load required for the house. When it doesn’t, there are a number of possibilities:
- Clogged air filter: A congested filter can lead to many troubles for a furnace, and we recommend you always make a check on the filter when you have heating troubles. If the filter is clogged, change it for a new one—and then keep up with changing it every 1 to 3 months afterward.
- Miscalibrated thermostat: The trouble may stem from a malfunctioning thermostat that’s incorrectly reading warmer temperatures. The thermostat will shut off the furnace before it reaches the desired temperature.
- Dirty burners: The burners in a gas furnace must be clean to allow them to access the air they need to ignite. If dirt builds up along them, or rust, it will restrict some of the burners from firing and drop the amount of heat they produce. Cleaning a burner requires the assistance of HVAC technicians.
- Leaking air ducts: Duct leaks are common in ventilation systems, but often overlooked. Loss of heated air in the ductwork due to holes and breaches will cause the levels of heat coming from the ducts to drop along with a drop in air pressure, leading to a general loss of comfort. Technicians skilled in duct repair and duct sealing will need to remedy this.
- Short cycling: This is when the furnace is turning off before completing its regular heating cycle. There are many potential causes for this, but one of the effects is that the furnace will not stay on long enough to spread sufficient heat around the home.
- Aging furnace: If you have a furnace that’s been in service for more than 15 years, the problem may be that it has worn down far enough that it can no longer do its job the way it once did. Repairs may be able to restore it, but it’s often more cost-effective to have a new one installed.
When you believe you need repairs for a furnace in Bellevue, WA, always call on a professional HVAC contractor. Whether you have a gas or electric furnace, you must leave the repair services to skilled and licensed experts. You can trust to our technicians to fix your furnace fast and right: our HVAC professionals are NATE-certified so you know you’re getting quality work.