Why Furnace Problems Often Appear in Late Fall
Tacoma’s warm summers mean most residential furnaces sit unused for most of the season. Over that time, dust settles on the burners, and the filter can trap the season’s wildfire smoke. A weak ignitor or worn blower bearing might not cause trouble the first time you run your furnace, but they can fail when the system starts cycling several times a day.
The Pacific Northwest climate also adds to the wear. Puget Sound winters are long and damp and put constant wear on parts over several months, with moisture adding to the strain.
Your Furnace Is Running, but the House Isn’t Getting Warm
If you hear your furnace running but your house is still chilly, start by checking the thermostat. Make sure it’s set to heat and programmed a few degrees above the current room temperature.
Next, check the air filter. Clogged filters can restrict airflow and cause less warm air to reach your rooms. Hold it up to a light and replace it if you can’t see through it. If your furnace still isn’t heating the house, you likely have a duct leak or burner issue that needs professional attention.
Your Furnace Is Blowing Cold Air
Your furnace blowing cold air often comes down to a thermostat issue. If it’s set to on instead of auto, the blower runs between heating cycles, and you’ll feel cool air whenever the burners are off.
If the air stays cold, the burners may not be lighting or may be shutting off early. A dirty flame sensor, a failing igniter, or a clogged condensate drain can cause this and may require professional furnace repair.
Your Furnace Keeps Turning On and Off
Restricted airflow is the most common reason your furnace keeps turning on and off, since an overheating furnace shuts itself off for safety. Try replacing the filter and opening any closed vents. If the furnace short cycling continues, a technician can check for a dirty flame sensor, failing limit switch, or an oversized system that needs replacement.
Airflow From Your Vents Feels Weak
Notice barely any air coming from your vents? Furniture, rugs, or curtains may be blocking registers and causing furnace airflow problems. Make sure all vents are clear and fully open to allow for proper airflow. If the airflow is still weak, you may have leaky ductwork or a dirty blower wheel that needs cleaning.
Your Furnace Is Making New or Unusual Noises
Your furnace making strange noises usually means something has broken or worn out. Common sounds Pierce County homeowners hear include:
- A boom when the burners light, signaling delayed ignition.
- Squealing from a worn belt or motor bearing.
- Scraping or grinding from a loose blower wheel.
- Repeated clicking with no flame because of an ignition problem.
Your Heating Bills Are Increasing Unexpectedly
If you’re having to budget more and more each month for heating bills, your furnace may be losing efficiency. If usage is much higher than the same month last year, clogged filters, duct leaks, short cycling, or aging equipment are likely to make your furnace work harder than it should.
Your Furnace Won’t Turn On
If your furnace won’t turn on, start by checking the thermostat batteries, a tripped breaker, or a service switch near the unit that someone may have bumped. Also make sure the front panel is fully closed and latched. If your unit still won’t turn on or a status light is blinking through the panel window, write down the blink pattern and call a technician.
Which Furnace Problems Can You Check Yourself?
Not all heating system problems need a repair call. If your system is blowing cold air or not turning on, try these furnace troubleshooting steps to rule out a quick fix:
- Remove the furnace filter and replace it if you can’t see any light through it.
- Open the vents and clear any furniture or belongings away from registers.
- Reset the breaker if it trips, and call a technician if it trips again.
- Clear leaves or debris from the vent pipes on high-efficiency furnaces.
When Is a Furnace Problem an Urgent Safety Concern?
A few furnace issues require immediate action. Act right away if you notice:
- A gas smell: Evacuate immediately and call 911 from outside.
- Carbon monoxide alarm: Get everyone out of the house and call emergency services.
- Burning plastic smell or smoke: Turn off the furnace at the switch or breaker and call for emergency heating repair.
How a Thorough Furnace Evaluation Finds the Real Problem
While warning signs can give you insight into what’s wrong, most furnace problems have several possible causes. A professional evaluation from Kliemann Brothers diagnoses the true source before recommending any repairs. Technicians test ignition, gas pressure, airflow, and safety controls, then explain their findings so you know exactly why your system isn’t working.
Repair or Replace? What Happens If the Furnace Has a Bigger Problem?
Most common furnace problems can be repaired if you catch them early enough. Issues like a dirty flame sensor or worn igniter often need only a quick cleaning or part swap and can be fixed the same day. Furnace replacement becomes worth considering when your unit is over 15 years old, you’ve searched for “furnace repair near me” multiple times over the past couple of seasons, or the heat exchanger is cracked.
Frequently Asked Questions About Furnace Repair
Why Is My Furnace Running Without Heating My Home?
Start by checking that the thermostat is set to heat and the temperature setting is above the room temperature. A clogged filter can also restrict airflow. If those checks do not restore heat, schedule a professional diagnosis.
Why Does My Furnace Blow Cold Air Between Heating Cycles?
If the thermostat fan setting is on, the blower can keep circulating air while the burners are off. Setting the fan to auto lets it run with the heating cycle. Air that stays cold during a call for heat needs further evaluation.
What Does Furnace Short Cycling Mean?
Short cycling means the furnace repeatedly starts and stops before completing a normal heating cycle. Restricted airflow, overheating, or a control problem can cause it. Check the filter and vents, then call a technician if it continues.
What Should I Tell a Furnace Repair Technician?
Describe when the problem happens, whether the furnace produces warm air, and any unusual sounds. If a status light is visible through the panel window, write down its blinking pattern without removing the panel.
Should I Repair or Replace an Older Furnace?
Age is one consideration, along with repair frequency, the condition of major components, and overall performance. Ask your technician to explain the repair findings and compare repair and replacement options before deciding.
Don’t Wait Until Winter to Address Furnace Problems
When the first few cold mornings hit Pierce County, schedules fill up and wait times grow as heating problems start to surface. If you notice any warning signs your furnace needs repair, call Kliemann Brothers today to get ahead of the late-fall rush. Our family-owned company has been serving Puget Sound homes since 1998, and we know what to look for when a furnace starts acting up.
Call us or book online to schedule furnace maintenance, inspections, or HVAC repair in Tacoma, Puyallup, Gig Harbor, or nearby communities today.
