Furnace issues in winter and how to address them

Dealing with furnace issues in the winter is not only inconvenient but also potentially dangerous. Here are common furnace problems and steps to address them:

1. Furnace Won’t Turn On

  • Cause:
    • Thermostat issues
    • Tripped circuit breaker
    • Clogged air filters
  • Solution:
    1. Check if the thermostat is set to “Heat” and the temperature is set higher than the current room temperature.
    2. Inspect the circuit breaker or fuse box for a tripped breaker.
    3. Replace or clean dirty air filters.

2. Inadequate Heat

  • Cause:
    • Dirty air filters
    • Blocked vents or ducts
    • Faulty burners
  • Solution:
    1. Replace or clean air filters monthly during high-use seasons.
    2. Ensure all vents and ducts are unobstructed.
    3. Contact a professional to clean or repair burners.

3. Short Cycling (Turning On and Off Frequently)

  • Cause:
    • Overheating due to clogged filters
    • Improperly sized furnace
  • Solution:
    1. Replace air filters regularly.
    2. Have an HVAC professional inspect the furnace’s size and functionality.

4. Pilot Light or Ignition Issues

  • Cause:
    • Dirty or faulty thermocouple
    • Pilot light is out
  • Solution:
    1. For older furnaces, relight the pilot light by following the manufacturer’s instructions.
    2. Clean or replace the thermocouple.
    3. For electronic ignition systems, check for error codes and consult a technician.

5. Blower Runs Constantly

  • Cause:
    • Fan switch set to “On”
    • Malfunctioning limit switch
  • Solution:
    1. Ensure the thermostat fan setting is “Auto.”
    2. If the blower still runs, have a technician inspect or replace the limit switch.

6. Strange Noises

  • Cause:
    • Rattling: Loose components
    • Whistling: Airflow obstructions
    • Grinding: Motor or blower issues
  • Solution:
    1. Tighten loose panels or screws.
    2. Replace or clean air filters to improve airflow.
    3. Have a professional check motor bearings or blower assembly.

7. Furnace Produces Unpleasant Odors

  • Cause:
    • Dust burning off after disuse
    • Mold in ducts
    • Gas leaks
  • Solution:
    1. Run the furnace for a few minutes to burn off dust.
    2. Clean ducts and check for mold growth.
    3. If you smell gas, shut off the furnace and call your gas provider or HVAC technician immediately.
    4. Can also contact your local gas supplier. most have emergency line, click here for ATCO

8. Carbon Monoxide Leaks

  • Cause:
    • Cracked heat exchanger
  • Solution:
    1. Install carbon monoxide detectors near sleeping areas.
    2. Turn off the furnace and evacuate if CO levels rise.
    3. Replace a damaged heat exchanger promptly.

9. High Energy Bills

  • Cause:
    • Poor furnace efficiency
    • Leaks in ducts or vents
  • Solution:
    1. Schedule annual furnace maintenance.
    2. Seal duct leaks and improve insulation.
    3. Upgrade to a more energy-efficient model if necessary.

Preventative Measures:

  • Schedule annual professional maintenance.
  • Change air filters every 1-3 months.
  • Use pleated filters in winter, and if you have an AC best to use fiberglass mesh in summer
  • Inspect the furnace before the heating season begins.
  • Keep vents and ducts clean and unobstructed.

By addressing these issues promptly and following regular maintenance routines, you can keep your furnace running smoothly and your home warm throughout the winter.

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