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Quick Troubleshooting Guide for Furnace Issues
Posted On: December 9, 2024
A malfunctioning furnace can be a major inconvenience, especially during colder months. Below is a simple guide to help identify and potentially resolve common furnace issues before calling a professional.
1. Furnace Won’t Turn On
- Check the Thermostat: Ensure it’s set to “Heat” and the temperature is set higher than the room temperature.
- Power Supply: Verify that the furnace is receiving power. Check the circuit breaker and reset it if necessary.
- Pilot Light or Ignition System: For older models, ensure the pilot light is lit. Modern furnaces might have electronic ignitions, which may need resetting.
2. Weak or No Airflow
- Check the Air Filter: A clogged filter can restrict airflow. Replace the filter if it’s dirty.
- Inspect the Blower Motor: Ensure the blower motor is functioning. Listen for unusual sounds or inspect the belt for damage.
- Blocked Vents: Make sure all supply and return vents are open and unobstructed.
3. Furnace Blowing Cold Air
- Thermostat Setting: Double-check that the thermostat is set to “Auto” and not “Fan.”
- Pilot Light or Ignition Issue: If the pilot light is out, relight it following the manufacturer’s instructions.
- Gas Supply: Ensure the gas valve is open and the supply is uninterrupted.
4. Frequent Cycling (Turns On and Off Repeatedly)
- Dirty Air Filter: Replace if clogged.
- Thermostat Placement: Ensure the thermostat is not placed near a heat source, as this can cause incorrect temperature readings.
- Overheating: A clogged filter or dirty blower wheel might cause the system to overheat and shut down as a safety precaution.
5. Strange Noises
- Rattling: Check for loose panels or screws and tighten them.
- Squealing: This might indicate a worn-out blower belt or motor bearings needing lubrication or replacement.
- Banging: Could signal a delayed ignition or ductwork expansion; consider professional inspection.
6. Furnace Leaking Water
- Condensate Line Blockage: Ensure the condensate drain line is clear and unclog it if necessary.
- Clogged Drain Pan: Check and empty the drain pan if it’s full.
- Condensing Furnace Issues: Inspect the exhaust vent or condensate pump for malfunctions.
7. Furnace Not Producing Enough Heat
- Thermostat Calibration: Ensure the thermostat is accurate and functioning correctly.
- Dirty Burner or Heat Exchanger: Clean these components carefully or schedule professional maintenance.
- Ductwork Issues: Check for leaks or blockages in the duct system.
When to Call a Professional
If troubleshooting doesn’t resolve the issue or if you notice signs of a more serious problem (e.g., gas smells, persistent leaks, or electrical issues), contact a certified HVAC technician immediately.
Regular maintenance and timely filter replacements can prevent many of these common issues!
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See What Our Customers Are Saying:
Aug 14, 2022
I had them replace my furnace last year. When it came time for the air conditioner this year, I did not hesitate to call Twintech again. I will also have them perform regular maintenance on them.
Aug 13, 2022
We required a new HVAC replacement after running the old
system for 18 years.
Dave understood our requirements and gave us a quote that
covered all the necessary items.
Installation was fast and very tidy. Everything works as
it should. Our thanks to Greg, Mitch and others for their
excellent work. Recommend this family owned business to
anyone else, considering HVAC or other work.
Aug 12, 2022
I needed a new furnace and A/C to replace my 21 yr. old units, and went to the internet to view potential companies in May, I received 3 quotes,
and chose Twintech based on their salesman Dave who was very detailed and covered off everything on what Twintech was all about,
an extremely dedicated company with so many years of experience, and after reading the on line reviews I was sold on Twintech, who did not disappoint as the installation team were top notch with Greg leading,
I would highly recommend this company without any doubts, in my books they are first class all the way. Our new Amana furnace and A/C are working perfectly !
Aug 11, 2022
Flawless transaction. They did exactly what they promised, showed-up on time, cleaned-up, and were highly professional. Highly recommended.
Aug 10, 2022
Salesperson and 2 man installation team were all professional and
knew their stuff. All three were friendly and helpful, answering all
my questions. The quality of their work demonstrated their experience
and expertise in their field.
Aug 9, 2022
A dear late cousin of mine recommended this company and I have been happy with the service.
Aug 8, 2022
We are very pleased with the work done by Twintech. They were very professional from start to finish. Dave came to our home and gave us a very competitive quote for new high efficiency furnace and air conditioner. The installers were very courteous and professional. We would highly recommend them.
Aug 7, 2022
Great experience getting an old furnace replaced.
Sales Guy (Dave) was great - honest, responsive, and friendly.
The work itself was done quickly and we are very happy with the outcome, thank you! We recommend TwinTech!
Aug 6, 2022
This review is late coming so my apologies to the amazing Twin Tech team! I contacted Dave at Twin Tech for a quote this past Feb (as I was collecting a few) and his recommendation was excellent. From the first meeting with Dave to the team installing the new furnace, not once did i feel uncomfortable . The team were extremely professional yet personable and clean and tidy. Decent companies still exist!
The new furnace just purrs and its just amazing the difference it has made!
(PS my sibling ended up getting a furnace from them as well)
Aug 5, 2022
The service was Twintech was excellent.
Dave our salesperson was easy to talk to and was professional. The unit recommended meets our needs and budget.
Greg and his team arrived on time for the installation and even got rid of the garbage the contractors left in our furnace.
Would definitely recommend Twintech.
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