(NAPSI)—When temperatures drop, many homeowners turn on their heating systems, sometimes for the first time in months. That seasonal startup is a good opportunity to pay attention, not just to whether the heat works, but to what your HVAC system may be telling you.
A strange odor, an unusually dirty filter or debris near a register doesn’t necessarily mean your HVAC system needs to be cleaned. However, certain signs may indicate that it is time to have the system professionally inspected.
Here are a few things to watch for as you turn up the heat this fall.
Dust or Debris Coming from Registers
A small amount of dust around a register is not necessarily unusual. But visible particles blowing from the registers, dark streaks surrounding them or debris collecting shortly after you clean may deserve a closer look.
A professional can look beyond the registers to help determine where the debris is coming from and whether cleaning or another corrective action is warranted.
Musty or Unusual Odors
It is not uncommon to notice a brief dusty smell when a heating system starts for the first time in the fall. That odor should fade fairly quickly.
A persistent musty, stale or otherwise unusual smell is different. Odors can have several possible sources, and covering them with air fresheners will not address the underlying issue. If the smell continues whenever the system operates, consider having it inspected.
Signs of Rodents or Insects
Unusual noises, droppings near registers, nesting material or unpleasant odors may indicate that rodents or insects have entered part of the HVAC system.
Because ductwork and other components are often behind walls, above ceilings or in attics and crawl spaces, homeowners may not be able to see the full extent of the problem. Any active infestation should be addressed by a qualified pest-control professional before HVAC cleaning begins.
Dust and Debris Following Renovations
Home improvement projects can create an enormous amount of fine dust. Drywall sanding, flooring installation, demolition and other construction activities can release particles that travel well beyond the immediate work area.
If registers and returns were not properly protected, or if the HVAC system operated while work was underway, construction debris may have entered the system. An inspection can help determine whether debris has collected inside and whether cleaning is necessary.
Uneven or Unexplained Airflow
Does one room suddenly feel much warmer or cooler than the others? Is there noticeably less air coming from a particular register?
Uneven airflow can have many causes, including closed dampers, blocked registers, damaged or disconnected ductwork, filter problems or issues with other HVAC components. It should not automatically be blamed on dirty ducts.
First, make sure registers are open and not blocked by furniture, rugs or curtains. If the difference persists, an HVAC professional can evaluate the system and identify the cause.
Filters That Become Dirty Unusually Quickly
Air filters naturally become dirty over time. How often they need to be changed depends on the type of filter, system use, household activities and whether the home has pets.
A filter that becomes heavily loaded much faster than usual, however, may be a clue that something has changed. The filter may be improperly fitted, air may be bypassing it or another condition may be introducing additional debris into the system.
Use the filter type recommended for your HVAC equipment and follow the manufacturer’s replacement guidance. If the rapid buildup continues, consider having the system evaluated.
Inspect First, Then Decide
None of these signs automatically means your entire HVAC system needs to be cleaned. Odors, dust and airflow changes can have many possible causes.
A professional inspection can help identify the source of the problem, document the condition of the system and determine whether cleaning or another corrective action is appropriate. If cleaning is recommended, ask what parts of the system will be addressed, how the work will be performed and how your home will be protected.
This information comes from Breathing Clean, a consumer resource from NADCA, The HVAC Inspection, Cleaning, and Restoration Association.
Learn More
Visit breathingclean.com to find a qualified NADCA member company nearby.
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